10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

                 For the fiscal year ended December 31, 2023

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number: 1-6686

THE INTERPUBLIC GROUP OF COMPANIES, INC.

(Exact name of registrant as specified in its charter)

Delaware	13-1024020
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

909 Third Avenue, New York, New York 10022

(Address of principal executive offices) (Zip Code)

(212)704-1200

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.10 per share	IPG	The New York Stock Exchange

Securities Registered Pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ý    No ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨    No ý

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý    No ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ý    No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☒

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐    No ý

As of June 30, 2023, the aggregate market value of the shares of the registrant’s common stock held by non-affiliates was approximately $14.9 billion. The number of shares of the registrant’s common stock outstanding as of February 15, 2024 was 378,725,237.

DOCUMENTS INCORPORATED BY REFERENCE

The following sections of the Proxy Statement for the Annual Meeting of Stockholders to be held on May 23, 2024 are incorporated by reference in Part III: “Election of Directors,” “Director Selection Process,” “Code of Conduct,” “Committees of the Board of Directors,” “Audit Committee Report,” “Delinquent Section 16(a) Reports,” “Executive Compensation,” “Non-Management Director Compensation,” “Compensation Discussion and Analysis,” “Compensation and Leadership Talent Committee Report,” “Outstanding Shares and Ownership of Common Stock,” “Transactions with Related Persons,” “Director Independence” and “Appointment of Registered Public Accounting Firm.”

TABLE OF CONTENTS

		Page
PART I
Item 1.	Business	2
Item 1A.	Risk Factors	10
Item 1B.	Unresolved Staff Comments	16
Item 1C.	Cybersecurity	16
Item 2.	Properties	17
Item 3.	Legal Proceedings	18
Item 4.	Mine Safety Disclosures	18
PART II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	19
Item 6.	[Reserved]
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	46
Item 8.	Financial Statements and Supplementary Data	48
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	98
Item 9A.	Controls and Procedures	98
Item 9B.	Other Information	98
Item 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	98
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	99
Item 11.	Executive Compensation	99
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	99
Item 13.	Certain Relationships and Related Transactions, and Director Independence	99
Item 14.	Principal Accountant Fees and Services	99
PART IV
Item 15.	Exhibits, Financial Statement Schedules	100
Item 16.	Form 10-K Summary	100

STATEMENT REGARDING FORWARD-LOOKING DISCLOSURE

This annual report on Form 10-K contains forward-looking statements. Statements in this report that are not historical facts, including statements regarding goals, intentions, and expectations as to future plans, trends, events, or future results of operations or financial position, constitute forward-looking statements. Without limiting the generality of the foregoing, words such as “may,” “will,” “expect,” “believe,” “anticipate,” “estimate,” “project,” “forecast,” “plan,” “intend,” “could,” “would,” “should,” “estimate,” “will likely result” or comparable terminology are intended to identify forward-looking statements. Forward-looking statements are based on current expectations and assumptions that are subject to risks and uncertainties, which could cause our actual results and outcomes to differ materially from those reflected in the forward-looking statements.

Actual results and outcomes could differ materially for a variety of reasons, including, among others:

•the effects of a challenging economy on the demand for our advertising and marketing services, on our clients’ financial condition and on our business or financial condition;

•our ability to attract new clients and retain existing clients;

•our ability to retain and attract key employees;

•risks associated with the effects of global, national and regional economic and political conditions, including counterparty risks and fluctuations in interest rates, inflation rates and currency exchange rates;

•the economic or business impact of military or political conflict in key markets;

•the impacts on our business of any pandemics, epidemics, disease outbreaks or other public health crises;

•risks associated with assumptions we make in connection with our critical accounting estimates, including changes in assumptions associated with any effects of a challenging economy;

•potential adverse effects if we are required to recognize impairment charges or other adverse accounting-related developments;

•developments from changes in the regulatory and legal environment for advertising and marketing services companies around the world, including laws and regulations related to data protection and consumer privacy; and

•the impact on our operations of general or directed cybersecurity events.

Investors should carefully consider the foregoing factors and the other risks and uncertainties that may affect our business, including those outlined under Item 1A, Risk Factors, in this annual report on Form 10-K and our quarterly reports on Form 10-Q. Investors are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. We undertake no obligation to update or revise publicly any of them in light of new information, future events, or otherwise.

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PART I

Item 1. Business

The Interpublic Group of Companies, Inc. ("Interpublic," the "Company," "IPG," "we," "us" or "our") was incorporated in Delaware in September 1930 under the name of McCann-Erickson Incorporated as the successor to the advertising agency businesses founded in 1902 by A.W. Erickson and in 1911 by Harrison K. McCann. The Company has operated under the Interpublic name since January 1961.

About Us

We provide marketing, communications and business transformation services that help marketers and brands succeed in today’s digital economy. Combining the power of creativity and technology, our approximately 57,400 employees and operations span all major world markets. Our companies specialize in insights, data, media, creative and production, digital commerce, healthcare marketing and communications. We create customized marketing solutions for clients that range in scale from large global marketers to regional and local clients. Comprehensive global services are critical to effectively serve our multinational and local clients in markets throughout the world as they seek to build brands, increase sales of their products and services, and gain market share.

The work we produce for our clients is specific to their unique needs. Our solutions vary from project-based activity to long-term, fully integrated campaigns. With operations in over 100 countries, we can operate in a single region or deliver global integrated programs.

IPG provides our agencies and clients with centralized resources, including unique assets in data, creativity and production, technology and artificial intelligence, which together form a foundation that enables our company to deliver ideas that drive growth for marketers and engage consumers at every touchpoint. Based in New York City, our corporate center sets company-wide financial objectives and corporate strategy, establishes financial management and operational controls, guides personnel policy, directs collaborative programs, conducts investor relations, manages environmental, social and governance ("ESG") programs, provides enterprise risk management and oversees mergers and acquisitions. In addition, we provide certain centralized functional services that enable operational efficiencies, including accounting and finance, research and development, technology, executive compensation management and recruitment assistance, employee benefits, market research, internal audit, legal services, real estate expertise and travel services.

Our Brands

IPG is a client‐centric company, and we seek to be essential partners to our clients in their own transformation journeys, providing them with seamless access to our best-in-class expertise across our entire portfolio. Our operations support the strategic position that marketers have access to the best and most appropriate Company resources to drive business success, and may access these capabilities from across the IPG network in an agile model called Open Architecture®. Consistent with this strategic principle, IPG’s agency brands are grouped into reportable segments based on the agencies’ primary capabilities.

•Media, Data & Engagement Solutions provides innovative capabilities and scale in global media and communications services, digital services and products, advertising and marketing technology, digital commerce, data management and analytics, strategic consulting, and digital brand experience. Our brands in this segment include IPG Mediabrands, UM, Initiative, KINESSO, Acxiom, Huge, MRM and R/GA.

•Integrated Advertising & Creativity Led Solutions provides advertising, corporate and brand identity services, and strategic consulting. The IPG brands include our leading global networks FCB, IPG Health, McCann Worldgroup, and MullenLowe Group as well as our domestic integrated agencies Campbell Ewald, Carmichael Lynch, Deutsch LA, The Martin Agency and others. These agencies have the leading role of ideation and the execution of creative ideas across complex integrated campaigns that are foundational to client brand identities.

•Specialized Communications & Experiential Solutions provides best‐in‐class global public relations and communications services, live events, sports and entertainment marketing, and strategic consulting. IPG brands include IPG DXTRA Health, The Weber Shandwick Collective, Golin, Jack Morton, Momentum and Octagon. These agencies create engaging experiences that allow consumers to build emotional connections and lasting relationships with brands.

All our brands leverage IPG’s unique assets in data and technology, creativity and production, media, consulting, technology and artificial intelligence to connect brand marketing and performance marketing, driving accelerated growth for our clients.

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We list approximately 80 of our companies on our website under the "Our Companies" section, with descriptions, capabilities and office locations for each. To learn more about our broad range of capabilities, visit our website at www.interpublic.com. Information on our website is not part of this report.

Market Strategy

We operate in a media, consumer and technology ecosystem that continues to evolve at a rapid pace. To help our clients win in a data-led and digital first world, we have made and continue to make investments in strategic areas including digital commerce, retail media, artificial intelligence, audience resolution, and production across world markets. In addition, we consistently review opportunities within our Company to enhance our operations through acquisitions and strategic alliances and internal programs that encourage client-centric collaboration. As appropriate, we also develop relationships with technology and emerging media companies that are building leading-edge marketing tools that complement our agencies' skill sets and capabilities.

In recent years, we have taken several major strategic steps to position our agencies as leaders in the global advertising and communications market. These include:

•Investment in leading talent: We believe our continued ability to attract and develop top talent and to be an industry employer of choice for an increasingly diverse workforce have been key differentiators for IPG. We continue to acquire and develop top strategic, creative and digital talent from a range of backgrounds.

•Growing our identity, data, digital commerce and platform capabilities: Our investments in talent and technology - growing data, identity resolution and platform capabilities - promise to drive further growth in this dynamic sector of our business. More than ever clients need audience-led thinking to solve for a widening set of business problems and opportunities in a digital-first world.

•Reinventing healthcare marketing: We have enhanced and strengthened our leadership position to deliver a comprehensive suite of services and global reach for healthcare clients. To do so, we have attracted and developed the industry’s most awarded and experienced talent, including scientists, strategists, creatives and engagement specialists across the entire healthcare marketing spectrum, enabling us to deliver healthcare information at speed, in ways that are highly personal, culturally relevant, as well as respectful of privacy.

•Retail media: We developed and launched a unified retail media network solution to provide brands with a holistic view of their performance across this fast-growth ecosystem of retail platforms. This capability, in turn, integrates with our commerce offering across the company, which extends to all core marketing functions – whether that’s media, creative, experiential, or PR and earned impressions.

Analytics teams, as well as modeling and decisioning tools, are core to all these strategic efforts. These are also areas where we continue to make investments in artificial intelligence. Combined with the latest advances in generative AI, we are now adding intelligence to the creation of content across the marketing spectrum. Together, these steps have built a culture of strategic creativity and high performance for marketers across IPG. We believe in the continued competitiveness of our offerings, the value of our long-term strategy, and the strength of our culture.

In 2023, IPG was once again ranked as the #1 most creatively effective holding company at the U.S. Effie Awards, the second consecutive year the Company has won this title. Altogether, 18 IPG agencies secured top honors across a range of categories and clients at the awards.

Data Offerings

IPG has incorporated data expertise into the core of the Company, as reflected most clearly in our acquisition in 2018 and subsequent integration of Acxiom, a leading enterprise data management company. Understanding data and its power is critical to the current and future success of our Company and our clients. We believe an ethical and conscious approach to data that respects consumer privacy will continue to be crucial as we navigate increased regulation in the digital media space.

Going forward, we plan to continue to enhance the technology layer within our offerings and to build tech-enabled marketing solutions, informed by a holistic understanding of audiences. This allows us to deliver personalized user experiences and more accountable marketing for brands. Combining the power of creativity and technology, we are able to provide marketing, communications and business transformation services that help marketers and brands succeed in today’s digital economy.

Diversity, Equity and Inclusion

IPG and our agencies are committed to diversity and inclusion, and we reinforce these values through a comprehensive set of award-winning programs. These include business resource groups that develop career building programs, as well as training around topics like unconscious bias. We seek to ensure accountability by tying executive compensation directly to the ability of

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our leaders to hire, promote and retain diverse talent, and we regularly measure the inclusiveness of our culture with a company-wide climate for inclusion survey.

We began our formal programs over a decade ago. Since then, IPG has seen notable improvements in the diversity of our workforce, and further progress is a management priority. We believe that an environment that encourages respect and trust is key to a creative business like ours, and that a competitive advantage comes with having a variety of perspectives and beliefs in our workforce.

We have been widely recognized for our efforts in this area. In January 2024 we announced that IPG had received several honors that recognize its initiatives and transparency around Environmental, Social and Governance (ESG) efforts this year. The honors include IPG’s fourth year on the Dow Jones Sustainability Index (North America), 14th year on the Human Rights Campaign Foundation’s 2023-2024 Corporate Equality Index, and recognition on “Best Places to Work for Disability Inclusion” by Disability Equality Index, among other accolades and ratings.

Acquisition Strategy

A disciplined acquisition strategy, focused on high-growth capabilities and regions of the world, is one component of growing our services in today's rapidly-changing marketing services and media landscape. When an outstanding resource or a strong tactical fit becomes available, we have been opportunistic over the years in making tuck-in, niche acquisitions that enhance our service offerings.

In recent years, IPG has acquired agencies across the marketing spectrum, including firms specializing in data and tech, e-commerce, mobile marketing, social media, healthcare communications and public relations, as well as agencies with full-service capabilities. These acquired agencies have been integrated into one of our global networks or specialist agencies. During 2023, IPG continued to further evolve our offerings, investing in new capabilities and innovation to help our clients succeed in today’s digital economy.

Our People

Because of the service character of our business, the quality of personnel is of crucial importance to our continuing success, and our employees, including creative, digital, research, media and account specialists, and their skills and relationships with clients, are among our most valuable assets. We conduct extensive employee training and development throughout our agencies and benchmark our compensation programs against those of our industry for their competitiveness and effectiveness in recruitment and retention. There is keen competition for qualified employees.

As of December 31, 2023, we employed approximately 57,400 people, of which approximately 23,800 were employed in the United States.

	As of December 31, 2023
Total	57,400
Domestic	23,800
International	33,600
United Kingdom	5,200
Continental Europe	6,800
Asia Pacific	10,500
Latin America	7,000
Other	4,100

We employ a balanced approach in managing our human capital resources. Depending on where a human-capital management function is most effective or efficient, processes are either managed at the holding company or designated to our operating units to adopt strategies appropriate for their client sector, workforce makeup, talent requirements and business demands.

The holding company retains oversight of all human capital resources and activities, setting standards and providing support and policy guidance and sharing programs. At the corporate level, centralized human capital management processes include development of human resources governance and policy; executive compensation for senior leaders across the Company; benefits programs; succession planning focusing on the performance, development and retention of the Company’s senior-most executives and key roles in the operating units; and executive development.

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IPG sets specific standards for human capital management and, on a yearly basis, assesses each operating unit’s performance in managing and developing its workforce. We undertake human capital initiatives with an aim of ensuring that employees have the high level of competence and commitment our businesses need to succeed. We formally assess our operating units against their efforts in the areas of people development, diversity and inclusion, performance management, talent acquisition and organization development in order to drive or support the units’ strategic business and growth goals. Accordingly, the operating units create and deploy skills-training programs, management training, employee goal-setting and feedback platforms, applicant-tracking systems, new-employee onboarding processes, and other programs intended to enhance the performance and engagement of the workforce.

As discussed above under Market Strategy — Diversity, Equity and Inclusion, diversity, equity and inclusion are essential priorities for IPG. Our goal is that our talent represents the diversity of our communities and consumers, with a corporate culture that drives belonging, well-being and growth. We believe that such a workplace will enable us to provide cultural insights to help our clients make authentic and responsible connections with their customers. The programs we provide in support of diversity, equity and inclusion include events, training and curated and bespoke content, research and tools, to foster awareness and action on an array of critical issues that we believe are vital for the recruitment, retention, advancement, well-being and belonging for people who are part of under-represented groups. We also foster business resource groups that offer programs on all facets of diversity and inclusion in support of our employees.

Environmental Sustainability Initiatives

IPG understands that climate change has consequences for all of us, bringing challenges for environmental protection, social wellbeing and good governance. It is a priority for our company to take action to address both causes and impacts of climate change. Our commitment includes measuring our carbon footprint and working toward limiting that footprint.

We believe that an integrated approach to ESG – which pursues environmental protection, social protection and good governance simultaneously – brings mutual benefits to our people and the communities where we live and work. To further its environmental goals, the Company works to limit carbon emissions by focusing on areas that include:

•using energy efficiently,

•managing travel with a sustainability lens,

•employing green building practices in our real estate holdings,

•tracking progress on sustainability metrics, and

•working toward greater responsibility for waste and consumption in the spaces we occupy.

In June 2021, Interpublic announced that as part of its commitment to environmental sustainability, the Company is moving forward on an ambitious climate action plan that consists of three simultaneous quantitative goals:

•Science-Based Targets: The Company's near-term emissions reduction targets have been submitted to and validated by the Science Based Targets initiative (SBTi). This commitment also makes Interpublic a signatory to the Business Ambition for 1.5°C and a member of the United Nations-backed Race to Zero campaign.

•Renewable Electricity: The Company also committed to sourcing 100% renewable electricity by 2030 for its entire portfolio.

•Net-Zero Carbon Emissions: Additionally, the Company formally joined The Climate Pledge, a commitment to reaching net-zero carbon across our business by 2040.

As part of our sustainability efforts and to record our commitments and progress, we currently report annually on our energy use and greenhouse gas emissions. This data, which we began measuring in 2015, is reported in line with frameworks that include the Global Reporting Initiative (“GRI”), the CDP (formerly the Carbon Disclosure Project), the Sustainability Accounting Standards Board (“SASB”) and the Task Force on Climate-Related Financial Disclosures ("TCFD").

In our 2020 GRI report, IPG, for the first time, reported the operational emissions (scope one and scope two emissions) across its entire global portfolio. For 2021, we expanded our assessment of and reporting on scope three emissions to account for and work on reducing impacts throughout the Company’s entire value chain. With IPG’s 2021 ESG report, the Company became the first U.S.-based advertising holding company to receive limited external assurance on certain ESG data and the first to disclose in accordance with TCFD recommendations. Our 2022 report added third-party assurance for GHG emissions from Scope 3/Category 6, Business Travel, and our 2023 report will include this metric as well.

As part of its sustainability efforts, IPG supports numerous community-based organizations and is actively involved in partnerships that bring together companies to advance climate action. Among these, IPG is a member of the Global Leadership Group of Ad Net Zero, a trade organization with a goal of supporting the advertising industry as it moves toward a net-zero carbon future for advertising production. We are also a participant of the U.N. Global Compact and an active supporter of the

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U.N. Sustainable Development Goals (SDGs), 17 global goals adopted by the United Nations General Assembly as part of its 2030 Agenda for Sustainable Development.

In recognition of our commitment to and implementation of sustainable business practices, IPG is listed on several ESG-related indices, including the Dow Jones Sustainability Index (DJSI) North America. The DJSI North America scores and ranks the ESG performance of the 600 largest U.S. and Canadian companies; the top 20% of sustainability performers are listed on the Index. The Company is also included on the FTSE4Good Index, which identifies companies that demonstrate strong ESG practices measured against international standards.

Our latest ESG report and CDP response are available on the “ESG Reporting” page of our website, www.interpublic.com. Information on our website is not part of this report.

Financial Objectives

Our financial goals include competitive organic growth of revenue before billable expenses and expansion of Adjusted EBITA margin, as defined and discussed within the Non-GAAP Financial Measure section of the MD&A, which we expect will further strengthen our balance sheet and total liquidity and increase value to our shareholders. Accordingly, we remain focused on meeting the evolving needs of our clients while concurrently managing our cost structure. Our disciplined approach to our balance sheet and liquidity provides us with a solid financial foundation and financial flexibility to manage and grow our business. We believe that our strategy and execution position us to meet our financial goals and to deliver long-term value to all of our stakeholders.

Financial Reporting Segments

We determined we conduct our business across three reportable segments described in Note 15 in Item 8, Financial Statements and Supplementary Data. The three reportable segments are: Media, Data & Engagement Solutions ("MD&E"), Integrated Advertising & Creativity Led Solutions ("IA&C"), and Specialized Communications & Experiential Solutions ("SC&E"). MD&E is comprised of IPG Mediabrands, Acxiom, and KINESSO, as well as our digital and commerce specialist agencies, which include MRM, R/GA, and Huge. IA&C is comprised of leading global networks and agencies that provide a broad range of services, including McCann Worldgroup, IPG Health, MullenLowe Group, Foote, Cone & Belding ("FCB"), and our domestic integrated agencies. SC&E is comprised of agencies that provide a range of marketing services expertise, including Weber Shandwick, Golin, our sports, entertainment, and experiential agencies, and IPG DXTRA Health.

We also report results for the “Corporate and other” group. See Note 15 in Item 8, Financial Statements and Supplementary Data, for further information.

Sources of Revenue

Our revenues are primarily derived from the planning and execution of multi-channel advertising, marketing and communications programs around the world. Our revenues are directly dependent upon the advertising, marketing and corporate communications requirements of our existing clients and our ability to win new clients. Most of our client contracts are individually negotiated, and, accordingly, the terms of client engagements and the bases on which we earn commissions and fees vary significantly. As is customary in the industry, our contracts generally provide for termination by either party on relatively short notice, usually 30 to 90 days, although our data management contracts typically have non-cancelable terms of more than one year.

Revenues for the creation and production of advertising or the planning and placement of media are determined primarily on a negotiated fee basis and, to a lesser extent, on a commission basis. Fees are usually calculated to reflect hourly rates plus proportional overhead and a mark-up. Many clients include an incentive compensation component in their total compensation package. This provides added revenue based on achieving mutually agreed-upon qualitative or quantitative metrics within specified time periods. Commissions are earned based on services provided.

We also generate revenue from data and technology offerings and in negotiated fees from our public relations, sales promotion, experiential marketing, sports and entertainment marketing, and corporate and brand identity services.

In most of our businesses, our agencies enter into commitments to pay production and media costs on behalf of clients, as is customary in the advertising and marketing industries. To the extent possible, we pay production and media charges after we have received funds from our clients, and in some instances we agree with the provider that we will only be liable to pay the production and media costs after the client has paid us for the charges. Generally, we act as the client’s agent rather than the primary obligor in these arrangements.

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Our revenue is typically lowest in the first quarter and highest in the fourth quarter.

	Consolidated Total Revenues for the Three Months Ended
	2023			2022			2021
(Amounts in Millions)			% of Total			% of Total			% of Total
March 31	$	2,521.0	23.2%	$	2,568.5	23.5%	$	2,257.0	22.0%
June 30	2,666.5		24.4%	2,735.7		25.1%	2,509.6		24.6%
September 30	2,678.5		24.6%	2,637.7		24.1%	2,542.0		24.8%
December 31	3,023.3		27.8%	2,985.9		27.3%	2,932.1		28.6%
	$	10,889.3		$	10,927.8		$	10,240.7

Clients

Our large and diverse client base includes many of the most recognizable companies and brands throughout the world. Our holding company structure allows us to maintain a diversified client base across and within a full range of industry sectors. In the aggregate, our top ten clients based on revenue before billable expenses accounted for approximately 20% of revenue before billable expenses in 2023 and 2022. Our largest client accounted for approximately 4% of revenue before billable expenses in 2023 and 2022. Based on revenue before billable expenses for the year ended December 31, 2023, our largest client sectors (in alphabetical order) were financial services, healthcare, and technology and telecom. We represent several different clients, brands or divisions within each of these sectors in a number of geographic markets, as well as provide services across multiple advertising and marketing disciplines, in each case through more than one of our agency brands. Representation of a client rarely means that we handle advertising for all brands or product lines of the client in all geographical locations. Any client may transfer its business from one of our agencies to another one of our agencies or to a competing agency, and a client may change its marketing budget at any time.

We operate in a highly competitive advertising and marketing communications industry. Our operating companies compete against other large multinational advertising and marketing communications companies as well as numerous independent and niche agencies and new forms of market participants to win new clients and maintain existing client relationships. See Item 1A, Risk Factors - We operate in a highly competitive industry.

Regulatory Environment

The advertising and marketing services that our agencies provide are subject to governmental regulation and other action in all of the jurisdictions in which the Company operates. While these governmental regulations and other actions can impact the Company’s operations, the specific marketing regulations we may face in a given market do not as a general matter significantly impact the Company’s overall service offerings or the nature in which we provide these services.

Governments, government agencies and industry self-regulatory bodies have adopted laws, regulations and standards, and judicial bodies have issued rulings, that directly or indirectly affect the form and content of advertising, public relations and other marketing activities we produce or conduct on behalf of our clients. These laws, regulations and other actions include content-related rules with respect to specific products and services, restrictions on media scheduling and placement, required disclosures regarding influencers and other endorsers and labeling or warning requirements with respect to certain products, for example pharmaceuticals, alcoholic beverages, tobacco products, and food and nutritional supplements. We are also subject to rules related to marketing directed to certain groups, such as children.

Digital marketing services are a dynamic and growing component of our business. Our service offerings in this area are covered by laws and regulations concerning user privacy, use of personal information, data protection and online tracking technologies. We are also subject to laws and regulations that govern whether and how we can transfer, process or receive certain data that we use in our operations, including data shared between countries or regions in which we operate. While we maintain policies and operational procedures to promote effective privacy protection and data management, existing and proposed laws and regulations in this area, such as the General Data Protection Regulation (“GDPR”) in the European Economic Area and as retained in the United Kingdom; the California Consumer Privacy Act (“CCPA”), the California Privacy Rights Act (“CPRA”), and other comprehensive privacy laws in several U.S. states; and other different forms of privacy legislation enacted or under consideration across the markets in which we operate, can impact the development, efficacy and profitability of internet-based and other digital marketing. Limitations on the scheduling, content or delivery of direct marketing activities can likewise impact the activities of our agencies offering those services. See Item 1A, Risk Factors - We are subject to industry regulations and other legal or reputational risks that could restrict our activities or negatively impact our financial performance or financial condition.

With agencies and clients located in over 100 countries worldwide, we are also subject to laws governing our international operations. These include broad anti-corruption laws such as the U.S. Foreign Corrupt Practices Act ("FCPA") and the U.K. Bribery Act (2010), which generally prohibit the making or offering of improper payments to government officials and political

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figures. Export controls and economic sanctions regimes, such as those maintained by the U.S. government and comparable ones by the U.K., the member states of the European Union and the U.N., impose limitations on the Company’s ability to operate in certain geographic regions, including Russia, or to seek or service certain potential clients. Likewise, our Treasury operations must comply with exchange controls, restrictions on currency repatriation and the control requirements of applicable anti-money-laundering statutes.

Available Information

Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and any amendments to these reports are available, free of charge, on our website at www.interpublic.com under the "For Investors" section, as soon as reasonably practicable after we electronically file such reports with, or furnish them to, the U.S. Securities and Exchange Commission ("SEC") at www.sec.gov.

Our Corporate Governance Guidelines, Interpublic Group Code of Conduct, Supplier Code of Conduct and the charters for each of the Audit Committee, Compensation and Leadership Talent Committee, and Corporate Governance and Social Responsibility Committee are available, free of charge, on our website at www.interpublic.com in the "Corporate Governance" subsection of the "About" section. Information on our website is not part of this report.

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Executive Officers of IPG

Name	Age	Office
Philippe Krakowsky	61	Chief Executive Officer
Ellen Johnson	58	Executive Vice President and Chief Financial Officer
Andrew Bonzani	60	Executive Vice President and General Counsel
Christopher F. Carroll	57	Senior Vice President, Controller and Chief Accounting Officer

There is no family relationship among any of the executive officers.

Mr. Krakowsky is Chief Executive Officer of IPG, a role he assumed on January 1, 2021. He is also a member of IPG’s Board of Directors. Prior to being named IPG's CEO, Mr. Krakowsky served as the company’s Chief Operating Officer beginning in September 2019, managing business operations across Interpublic, with direct oversight of IPG’s independent companies including Carmichael Lynch, Deutsch, Hill Holliday, Huge and R/GA and IPG's Media, Data and Technology offerings including IPG Mediabrands, Acxiom, KINESSO and Matterkind. During that time, Mr. Krakowsky was also Chairman of IPG Mediabrands. Over the course of his nearly two-decade tenure at IPG, Mr. Krakowsky has also led the strategy, talent, communications and business development functions for the holding company. Before taking on the COO role at IPG, Mr. Krakowsky spent a number of years as CEO of Mediabrands, leading the 10,500-person media investment unit, as well as served as interim-CEO of FCB. From February 2011 until assuming the role of COO, Mr. Krakowsky was also IPG’s Chief Strategy and Talent Officer, where he oversaw key functions that have been vital to the company’s development and growth.

Ms. Johnson became Executive Vice President and Chief Financial Officer of the Company, effective January 1, 2020. Prior to that time, Ms. Johnson served as Senior Vice President of Finance and Treasurer from February 2013 to December 31, 2020, and as Senior Vice President and Treasurer from October 2004 to February 2013. She served as Executive Vice President, Chief Financial Officer of The Partnership, a division of IPG from May 2004 to October 2004, and prior to that, served as Assistant Treasurer, International from February 2000 to May 2004.

Mr. Bonzani was hired as Senior Vice President, General Counsel and Secretary in April 2012. He was promoted to Executive Vice President, General Counsel and Secretary in February 2019 and now serves as Executive Vice President and General Counsel as of February 2021. Prior to joining IPG, Mr. Bonzani worked at IBM for 18 years, holding a number of positions in the legal department, most recently as Vice President, Assistant General Counsel and Secretary from July 2008 to March 2012.

Mr. Carroll was named Senior Vice President, Controller and Chief Accounting Officer in April 2006. In 2017, Mr. Carroll assumed additional responsibilities as Chief Financial Officer for DXTRA. Mr. Carroll served as Senior Vice President and Controller of McCann Worldgroup from November 2005 to March 2006. Prior to joining us, Mr. Carroll served in various Chief Accounting Officer and Controller roles, as well as a Financial Vice President at Lucent Technologies, Inc. and began his professional career at PricewaterhouseCoopers from October 1991 to September 2000.

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Item 1A. Risk Factors

We are subject to a variety of possible risks that could adversely impact our revenues, results of operations or financial condition. Some of these risks relate to general economic and financial conditions, while others are more specific to us and the industry in which we operate. The following factors set out potential risks we have identified that could adversely affect us. The risks described below may not be the only risks we face. Additional risks that we do not yet know of, or that we currently think are immaterial, could also have a negative impact on our business operations or financial condition. See also Statement Regarding Forward-Looking Disclosure.

Risks Related to the Global Market and the Economy

•Our results of operations are highly susceptible to unfavorable or uncertain economic conditions.

We are exposed to risks associated with weak or uncertain regional or global economic conditions and disruption in the financial markets. Market conditions can be and have been adversely affected by natural and human disruptions, such as natural disasters, public health crises, severe weather events, military conflict or civil unrest. Economic downturns or uncertainty about the strength of the global economy generally, or adverse economic conditions in certain regions or market sectors and resulting caution with respect to spending on the part of marketers, can have and has had a negative effect on the demand for advertising and marketing communication services. The global economy continues to be challenging, including as a result of the adverse effects of the continuing impact of supply chain and labor disruptions, inflationary pressures and conflict in Ukraine and the Middle East. Any prolonged disruption to business or financial markets in the United States, which accounted for approximately 65% of our consolidated total revenue in 2023, as a result of anticipated or actual governmental shutdowns or debt defaults could have an adverse impact on our clients and our business. Our industry has in the past been affected more severely than other sectors by an economic downturn and recovered more slowly than the economy in general. Previously in response to negative economic and financial conditions, including in connection with the outbreak of the COVID-19 pandemic in 2020, some clients responded by reducing their marketing budgets, which include discretionary components that are easier to reduce in the short term than other operating expenses. Our 2023 results for example, were negatively impacted by significant reductions in spending by clients in the technology & telecom sector. This pattern may recur in the future.

Furthermore, unexpected revenue shortfalls can result in misalignments of costs and revenues, resulting in a negative impact to our operating margins. If our business is significantly adversely affected by unfavorable economic conditions or other market disruptions that adversely affect client spending, the negative impact on our revenue could pose a challenge to our operating income and cash generation from operations.

•The impact of the COVID-19 pandemic and any future public health crises may in the future adversely impact our business, financial condition and results of operations.

The COVID-19 pandemic created both regional and worldwide operational volatility and uncertainty in certain markets and sectors that have been slower to rebound or continue to face lingering disruptions. Some clients, particularly in the early months of the pandemic, responded to resulting weak or volatile economic and financial conditions by reducing their marketing budgets, thereby decreasing the market and demand for our services, or adjusted, reduced or suspended operating activities, which negatively impacted certain of the markets or industries we serve. These patterns may recur in future periods, including as a result of pandemic developments such as the emergence of new virus variants that may be more transmissible, virulent or both.

Risks Related to Our Industry and Operations

•We operate in a highly competitive industry.

The advertising and marketing communications business is highly competitive and constantly changing. Our agencies and media services compete with other agencies and other providers of creative, marketing or media services to maintain existing client relationships and to win new business. Our competitors include not only other large multinational advertising and marketing communications companies, but also smaller entities that operate in local or regional markets as well as new forms of market participants.

Competitive challenges also arise from rapidly evolving and new technologies in the marketing and advertising space, creating opportunities for new and existing competitors and a need for continued significant investment in tools, technologies and process improvements. As data-driven marketing solutions become increasingly core to the success of our brands, and with the development of new and emerging technologies like generative AI, any failure to keep up with rapidly changing technologies and standards in this space could harm our competitive position. These technologies also present risks related to ethical considerations, intellectual property protection and privacy and data protection.

The client’s perception of the quality of our agencies’ creative work, its confidence in our ability to protect the confidentiality of their and their customers’ data and its relationships with key personnel at the Company or our agencies are important factors that affect our competitive position. An agency’s ability to serve clients, particularly large international clients, on a broad geographic basis and across a range of services and technologies may also be an important competitive

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consideration. On the other hand, because an agency’s principal asset is its people and freedom of entry into the industry is almost unlimited, our relationships with clients can be affected by the departure of key personnel and a small agency is, on occasion, able to take all or some portion of a client’s account from a much larger competitor.

•Clients may terminate or reduce their relationships with us on short notice.

Many companies put their advertising and marketing communications business up for competitive review from time to time, and we have lost client accounts in the past as a result of such periodic competitions. Our clients may choose to terminate their contracts, or reduce their relationships with us, on a relatively short time frame and for any reason. A relatively small number of clients contribute a significant portion of our revenue. In the aggregate, our top ten clients based on revenue before billable expenses accounted for approximately 20% of revenue before billable expenses in 2023. A substantial decline in a large client’s advertising and marketing spending, or the loss of a significant part of its business, could have a material adverse effect upon our business and results of operations.

Our ability to attract new clients and to retain existing clients may also, in some cases, be limited by clients’ policies or perceptions about conflicts of interest, or our own exclusivity arrangements with certain clients. These policies can, in some cases, prevent one agency, or even different agencies under our ownership, from performing similar services for competing products or companies.

•We may lose or fail to attract and retain key employees and management personnel.

Our employees, including creative, digital, research, media and account specialists, and their skills and relationships with clients, are among our most valuable assets. An important aspect of our competitiveness is our ability to identify and develop the appropriate talent and to attract and retain key employees and management personnel. Our ability to do so is influenced by a variety of factors, including the compensation we award and factors which may be beyond our control. The advertising and marketing services industry can be particularly sensitive to shifts in labor markets, as it is characterized by a high degree of employee mobility and significant use of third-party or temporary workers to staff new, growing or temporary assignments. The impact of the COVID-19 pandemic contributed in recent years to an increase in labor costs, shortages, disruptions and turnover. In addition, changes to U.S. or other immigration policies or travel restrictions imposed as a result of public health, political or security concerns that restrain the flow of professional talent also may inhibit our ability to staff our offices or projects. If we were to fail to attract key personnel or lose them to competitors or clients, or fail to manage our workforce effectively, our business and results of operations could be adversely affected.

•We are subject to industry regulations and other legal or reputational risks that could restrict our activities or negatively impact our performance or financial condition.

Our industry is subject to government regulation and other governmental action, both domestic and foreign. Advertisers and consumer groups may challenge advertising through legislation, regulation, judicial actions or otherwise, for example on the grounds that the advertising is false and deceptive or injurious to public welfare. Our business is also subject to specific rules, prohibitions, media restrictions, labeling disclosures and warning requirements applicable to advertising for certain products.

Existing and proposed laws and regulations, in particular in the European Union, the United Kingdom and the United States, concerning user privacy, use and protection of personal information and whether and how we can transfer, process or receive certain data that we use in our operations, including the General Data Protection Regulation (the “GDPR”) in the European Economic Area and as retained in the United Kingdom, the California Consumer Privacy Act (the “CCPA”), and other U.S. state comprehensive privacy laws, could affect the efficacy and profitability of internet-based, digital and targeted marketing. For instance, the GDPR imposes strict requirements on transfers of personal data to third countries, including the United States, whose protection of that data is not deemed to be adequate. Changes in the interpretation of existing consumer protection laws, including if our ability to transfer data between countries and regions in which we operate is restricted, may increase the costs of compliance, harm our business or result in significant penalties or legal liability.

Regulators and legislators in the European Union, United Kingdom, and United States are increasingly focused on the use of cookies, online tracking technologies, and the sharing of personal data with third parties for targeted or behavioral advertising. This has resulted in the promulgation or consideration of new or updated regulations under the GDPR, the CCPA, and other U.S. state privacy laws. Our digital business could be adversely affected if such laws or regulations are adopted, interpreted or implemented in a manner that is inconsistent with, or that requires changes to, our current business practices. Restrictions on digital or targeted advertising practices, the enactment or future enforcement of state privacy laws, or the unanticipated application of such laws and regulations, could affect the manner in which we provide our services or adversely affect our financial results. Furthermore, if we are prohibited from sharing data among our products and services, or if regulators enforce strict limitations on the use of tracking technologies for targeted or behavioral advertising, this could lead to substantial costs, limit the effectiveness of our services, and subject us to additional liabilities. The imposition of restrictions on these technologies by private market participants in response to privacy concerns could also have a negative impact on our digital business.

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Legislators, agencies and other governmental units may also continue to initiate proposals to ban the advertising of specific products, such as alcohol, tobacco or marijuana products, and to impose taxes on or deny deductions for advertising, which, if successful, may hinder our ability to accomplish our clients’ goals and have an adverse effect on advertising expenditures and, consequently, on our revenues or results. Governmental action, including judicial rulings, on the relative responsibilities of clients and their marketing agencies for the content of their marketing can also impact our operations. Furthermore, we could suffer reputational risk as a result of governmental or legal action or from undertaking work that may be challenged by consumer groups or considered controversial, in poor taste or not conforming to contemporary social standards.

•We rely extensively on information technology systems and face cybersecurity risks.

As discussed under Item 1C, Cybersecurity, we rely extensively and increasingly on information technologies and infrastructure to manage our business, develop new business opportunities and digital products, and process business transactions, and our business operations depend on the availability, integrity and secure processing, storage, and transmission of confidential and sensitive information digitally and through interconnected systems, including those of our vendors, service providers and other third parties. The incidence of malicious technology-related events, such as cyberattacks, computer hacking, computer viruses or other destructive or disruptive software, phishing attacks and other attempts to gain access to confidential or personal data, denial of service or ransomware attacks or other malicious activities, is on the rise worldwide and highlights the need for continual and effective cybersecurity awareness and education. We, our clients and our vendors are increasingly the target of hackers and other threat actors, denial of service attacks and malicious code, which can result in the unauthorized access, misuse, loss, or destruction of data (including confidential and sensitive data), unavailability of services and supply chain disruptions, or other adverse events.

Our business, which increasingly involves the collection, use and transmission of customer data, including personal information, makes us and our agencies attractive targets for malicious third-party attempts to access this data. Power outages, equipment failure, natural disasters (including extreme weather), terrorist activities or human error also affect our systems and can result in disruption of our services or loss or improper disclosure of personal data, business information, including intellectual property, or other confidential information. We utilize in-house and third-party services, including third-party “cloud” computing services, to perform key operational functions, including the storage, transfer or processing of data. System failures or network disruptions or breaches in such in-house or third-party systems could adversely affect our business operations, financial condition and reputation or expose us to increased risk of litigation or regulatory enforcement action.

The threat landscape is constantly evolving. Cybersecurity incidents or data breaches affecting the confidentiality, integrity, or availability of the information we process, our data systems, or those operated on our behalf by third-party service providers adversely affect our ability to manage our risk exposure and could significantly harm our business. We operate in many respects on a decentralized basis, with a large number of agencies and legal entities, and the resulting size, diversity and disparity of our technology systems and complications in implementing standardized technologies and procedures increases our vulnerability to such breakdowns, malicious intrusions or attacks.

Data privacy or cybersecurity breaches, or any failure to maintain the confidentiality of sensitive information, by employees and others poses the risk that sensitive data, such as personal information, strategic plans and trade secrets, could be exposed to third parties or to the general public. Breaches or breakdowns that result in a loss of our or our clients’ or vendors’ proprietary information expose us to legal liability and can be expensive to remedy. We consider the ethical treatment of data to be a business strength, and so the damage to our reputation and business from any such breach could be significant and costly. Efforts to develop, implement and maintain security measures are costly, may not be successful in preventing these events from occurring and require ongoing monitoring and updating as technologies and cyberattack techniques change frequently, or are not recognized until successful and efforts to overcome security measures become more sophisticated. We operate worldwide, and the legal rules governing data transfers are often complex, conflicting, unclear or ever-changing. Increased privacy and cybersecurity requirements increase our operating and compliance costs and can negatively impact our business or financial condition.

Furthermore, as part of our response to the challenges of the COVID-19 pandemic, modified processes, procedures and controls were required to respond to the changes in our business environment as a significant number of our employees have continued to work from home for at least a portion of the work week. The increase in remote working of our employees exacerbates risks related to the increased demand for information technology resources, malicious technology-related events, including cyberattacks and phishing attacks, and improper dissemination of personal, proprietary or confidential information.

•International business risks could adversely affect our operations.

We are a global business, with agencies operating in over 100 countries. Operations outside the United States represent a significant portion of our revenue before billable expenses, approximately 35% in 2023. These operations are exposed to risks that include local legislation, currency variation, exchange control restrictions, local labor and employment laws that hinder workforce flexibility, large-scale local or regional public health crises, and other difficult social, political or economic conditions.

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We also must comply with applicable U.S., local and other international anti-corruption laws, including the FCPA and the U.K. Anti-Bribery Act (2010), which can be comprehensive, complex and stringent, in all jurisdictions where we operate, certain of which present heightened compliance challenges. Export controls and economic sanctions, such as those maintained by the Office of Foreign Assets Control of the U.S. Department of the Treasury, can impose limitations on our ability to operate in certain geographic regions or to seek or service certain potential clients, including in Russia and, increasingly, China. These restrictions can place us at a competitive disadvantage with respect to those competitors who may not be subject to comparable restrictions. Failure to comply or to implement business practices that sufficiently prevent corruption or violation of sanctions laws could result in significant remediation expense and expose us to significant civil and criminal penalties and reputational harm.

In addition, in developing countries or regions, we may face further risks, such as slower receipt of payments, nationalization, social and economic instability, currency repatriation restrictions and undeveloped or inconsistently enforced commercial laws. These risks may limit our ability to grow our business and effectively manage our operations in those countries.

•The costs of compliance with sustainability or other environmental, social responsibility or governance (ESG) laws, regulations or policies, including investor and client-driven policies and standards, could adversely affect our business.

We are increasingly impacted by the effects of climate change and laws and regulations related to climate and other ESG concerns. We could also incur related costs indirectly through our clients or investors. Increasingly our clients request that we comply with their own social responsibility, sustainability or other business policies or standards, which may be more restrictive than current laws and regulations, before they commence, or continue, doing business with us, and ESG issues are increasingly a focus of the investor community. If large shareholders were to reduce their ownership stakes in our Company as a result of dissatisfaction with our policies or efforts in this area, there could be negative impact on our stock price, and we could also suffer reputational harm. Further, if clients’ costs are adversely affected by climate change or related laws and regulations, this could negatively impact their spending on our advertising and marketing services. We could also face increased prices from our own suppliers that face climate change-related and other ESG costs and seek to pass on their increased costs to their customers.

In 2021, we committed to certain science-based emissions targets, the sourcing of 100% of our electricity needs from renewable sources by 2030 and the realization of net-zero carbon emissions by 2040. Some clients and investors may request that we commit to emissions targets and timeframes that may be more aggressive than the commitments we have already undertaken. Any setbacks in the feasibility or timing of the achievement of our commitments could result in reputational harm or damaged relationships with clients or consumers. We expect the financial and operational costs of complying with ESG laws and regulations or achieving our ESG goals and related certification requirements will grow significantly in future years.

•If our clients experience financial distress, it could negatively affect our own financial position and results.

We have a large and diverse client base, and at any given time, one or more of our clients may experience financial difficulty, file for bankruptcy protection or go out of business. Unfavorable economic and financial conditions, including those resulting from regional or global economic downturns, and military conflicts or other geopolitical risks could result in an increase in client financial difficulties that negatively affect us. The direct impact on us could include reduced revenues and write-offs of accounts receivable and expenditures billable to clients, and if these effects were severe, the indirect impact could include impairments of intangible assets, credit facility covenant violations and reduced liquidity.

•If our clients seek to change or delay payment terms, it could negatively affect our own financial position and results.

In most of our businesses, our agencies enter into commitments to pay production and media costs on behalf of clients. The amounts involved substantially exceed our revenues and primarily affect the level of accounts receivable, expenditures billable to clients, accounts payable and accrued liabilities. To the extent possible, we pay production and media charges only after we have received funds from our clients. However, if clients are unable to pay for commitments that we have entered into on their behalf, or if clients seek to significantly delay or otherwise alter payment terms, there could be an adverse effect on our working capital, which would negatively impact our operating cash flow.

•We face risks associated with our acquisitions and other investments.

We regularly undertake acquisitions and other investments that we believe will enhance our service offerings to our clients, such as our acquisition of Acxiom in 2018 and RafterOne in 2022. These transactions can involve significant challenges and risks, including that the transaction does not advance our business strategy or fails to produce a satisfactory return on our investment. Our customary business, legal and financial due diligence with the goal of identifying and evaluating the material risks involved may be unsuccessful in ascertaining or evaluating all such risks. Though we typically structure our acquisitions to provide for future contingent purchase payments that are based on the future performance of the acquired entity, our forecasts of the investment’s future performance also factor into the initial consideration. When actual financial results differ, our returns on the investment could be adversely affected.

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We may also experience difficulty integrating new employees, businesses, assets or systems into our organization, including with respect to our internal policies and required controls. We may face reputational and legal risks in situations where we have a significant minority investment but limited control over the investment's operations. Furthermore, it may take longer than anticipated to realize the expected benefits from these transactions, or those benefits may ultimately be smaller than anticipated or may not be realized at all. Talent is among our most valuable assets, and we also may not realize the intended benefits of a transaction if we fail to retain targeted personnel. Acquisition and integration activity may also divert management’s attention and other corporate resources from other business needs. If we fail to realize the intended advantages of any given investment or acquisition, or if we do not identify or correctly measure the associated risks and liabilities, our results of operations and financial position could be adversely affected.

Risks Related to Our Financial Condition and Results

•Our financial condition could be adversely affected if our available liquidity is insufficient.

Agency operating cash flows have a significant impact on our liquidity, and we maintain a commercial paper program, a committed corporate credit facility and uncommitted lines of credit to increase flexibility in support of our operating needs. If any of these sources were unavailable or insufficient, our liquidity and ability to adequately fund our operations could be adversely affected, and we could be required to refinance, restructure or otherwise amend some or all of our obligations, sell assets or raise additional cash in the capital markets, and there could be a negative impact on our credit ratings. Increases in interest rates raise our borrowing costs. We cannot assure you that we would be able to access any new sources of liquidity, including in the capital markets, on commercially reasonable terms or at all or, if accomplished, that we would raise sufficient funds to meet our needs.

We maintain a $1.5 billion committed corporate credit facility (the “Credit Agreement”) as a backstop source of liquidity. The Credit Agreement also supports our ability to borrow under our commercial paper program. Under our commercial paper program, we are authorized to issue short-term debt up to an aggregate amount outstanding at any time of $1.5 billion, which we may use for working capital and general corporate purposes. If credit under the Credit Agreement or our ability to access the commercial paper market were unavailable or insufficient, our liquidity could be adversely affected.

The Credit Agreement contains a leverage ratio and other, non-financial, covenants, and events like a material economic downturn could adversely affect our ability to comply with them. For example, compliance with the financial covenant would be more difficult to achieve if we were to experience increased indebtedness or substantially lower revenues, including as a result of economic downturns, client losses or a substantial increase in client defaults. If we were unable to comply with any of the covenants contained in the Credit Agreement, we could be required to seek an amendment or waiver from our lenders, and our costs under these agreements would likely increase. If we were unable to obtain a necessary amendment or waiver, the Credit Agreement could be terminated, any outstanding amounts could be subject to acceleration, and we could lose access to certain uncommitted financing arrangements and commercial paper.

For further discussion of our liquidity profile and outlook, see Liquidity and Capital Resources in Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations.

•Downgrades of our credit ratings could adversely affect us.

Because ratings are an important factor influencing our ability to access capital and the terms of any new indebtedness, including covenants and interest rates, we could be adversely affected if our credit ratings were downgraded or if they were significantly weaker than those of our competitors. Our access to the commercial paper market is contingent on our maintenance of sufficient short-term debt ratings, and any downgrades to those ratings could increase our borrowing costs and reduce the market capacity for, or our ability to issue, commercial paper. Our clients and vendors may also consider our credit profile when negotiating contract terms, and if they were to change the terms on which they deal with us, it could have an adverse effect on our liquidity.

•Our earnings would be adversely affected if we were required to recognize asset impairment charges or increase our deferred tax valuation allowances.

We evaluate all of our long-lived assets (including goodwill, other intangible assets, fixed assets and operating lease right-of-use assets), investments and deferred tax assets for possible impairment or realizability annually or whenever there is an indication that they are impaired or not realizable. If certain criteria are met, we are required to record an impairment charge or valuation allowance.

As of December 31, 2023, we had substantial amounts of long-lived assets, deferred tax assets and investments on our Consolidated Balance Sheet, including approximately $5.1 billion of goodwill. Future events, including our financial performance, market valuation of us or market multiples of comparable companies, loss of a significant client’s business or strategic decisions, could cause us to conclude that impairment indicators exist and that the asset values associated with long-lived assets, deferred tax assets and investments may have become impaired. Any significant impairment loss would have an adverse impact on our reported earnings in the period in which the charge is recognized. For further discussion of goodwill and

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other intangible assets, as well as our sensitivity analysis of our valuation of these assets, see Critical Accounting Estimates in Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations.

•Our financial results are exposed to exchange rate risk.

Because a significant portion of our business is denominated in currencies other than the U.S. Dollar, such as the British Pound Sterling, the Euro, the Japanese Yen and Australian Dollar, fluctuations in exchange rates between the U.S. Dollar and such currencies may adversely affect our financial results.

•We may not be able to meet our performance targets and milestones.

From time to time, we communicate to the public certain targets and milestones for our financial and operating performance that are intended to provide metrics against which to evaluate our performance. They should not be understood as predictions or guidance about our expected performance. Our ability to meet any target or milestone is subject to inherent risks and uncertainties, and we caution investors against placing undue reliance on them. See Statement Regarding Forward-Looking Disclosure.

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Item 1B. Unresolved Staff Comments

None.

Item 1C. Cybersecurity

Risk Management and Strategy

We rely extensively and increasingly on information technologies and infrastructure to manage our business (including the digital storage of marketing strategies and client information), develop new business opportunities and digital products, and process business transactions. Digital services and products, advertising and marketing technology, e‐commerce services, data management and analytics and digital brand experience constitute a key part of our client offerings. Our business operations therefore depend on the availability, integrity and secure processing, storage, and transmission of confidential and sensitive information, including personal information, digitally and through interconnected systems, including those of our vendors, service providers and other third parties.

Consequently, we maintain comprehensive policies and procedures designed to prevent and mitigate the risks posed by cybersecurity threats and incidents and to identify, analyze, address, mitigate and remediate those incidents that do occur. As part of our program:

•we regularly review and update at least annually our standard policies and procedures related to information technology and analyze those policies against the standards and controls that we believe are most relevant to our Company set by organizations such as the National Institute of Standards and Technology (NIST) cybersecurity framework and the International Organization for Standardization (ISO);

•we maintain a dedicated cybersecurity team under the direction of our Chief Information Officer (CIO), including our Chief Information Security Officer (CISO), each of whom has expertise related to data and network security, data governance and risk management;

•we regularly test our internal IT controls;

•we regularly conduct internal as well as third-party attack and penetration tests;

•we maintain, and we require our third-party service providers to maintain, security controls designed to ensure the confidentiality, integrity, and availability of our systems and the confidential and sensitive information we maintain and process, or which is processed on our behalf;

•all employees are required to complete periodic trainings that cover security and privacy best practices and company policies; and

•we have prepared and regularly review our business continuity, disaster recovery and other back-up plans, including as they relate to cybersecurity incidents.

We also work with third-party cybersecurity and data privacy professionals as part of the design and implementation of our program, including our accountants, independent assessors (for example, for penetration testing) of our cybersecurity program, external legal counsel and other consultants.

We have an incident reporting and escalation process designed to detect and analyze cyber incidents as they occur to determine appropriate response action and reporting, including the materiality of any such incidents to our financial condition and operations. This process includes:

•continual monitoring of our systems and logs by both internal and outsourced staff;

•immediate escalation to an incident reporting call and review by our CIO of certain signals, including evidence of external threat actors, ransomware attacks, data exfiltration, identity compromise or unusual requests from management or certain departments;

•if deemed appropriate, reporting by our CIO to the Executive Risk Committee, comprised of multi-disciplinary senior leaders across the organization, including representatives of our accounting, human resources, finance, information technology and legal functions, and consultation with internal and external legal counsel, for further review and determination of the scope and materiality of the incident or incidents, including whether public disclosure is appropriate or required; and

•informing our Board of Directors (the “Board”) and the Audit Committee of the Board of significant or material cybersecurity incidents, as appropriate.

All incidents are documented and recorded and cataloged for further review by the CISO team.

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While we, our clients and our vendors are regularly exposed to malicious technology-related events and threats, none of these threats or incidents, either individually or in the aggregate of related occurrences, have materially affected the Company in the period covered by this report. In determining materiality, cybersecurity incidents are reviewed not only for potential financial impacts, which could include potential legal and regulatory penalties, stolen assets or funds, system damage, forensic and remediation costs, lost client revenue or litigation costs, but also the breadth and sensitivity of data exposure, data exfiltration, impacts on the ability to operate our business or provide our services, client dissatisfaction, and loss of investor confidence. See Item 1A, Risk Factors, for more information on the cybersecurity threats facing our Company.

Governance

Our Board actively oversees Interpublic’s risk management activities both directly and through its committees and considers various risk topics throughout the year, including cybersecurity and information security risk management and controls. As part of its oversight function, the Board oversees the Company’s risk assessment and risk management policies and performs an annual review and assessment of the primary operational and regulatory risks facing Interpublic, their relative magnitude and management’s plan for mitigating these risks. At least annually, our CIO and CISO report to the full Board with a comprehensive report addressing a broad range of topics, including updates on strategy and investments, significant cybersecurity incidents that have occurred since the last update, the status of projects and initiatives to update our cybersecurity policies and practices, industry trends, and ongoing efforts to prevent, detect, and respond to internal and external critical threats.

The Audit Committee oversees the design and operation of the Company’s enterprise risk management program, including, in conjunction with the Board, oversight of its cybersecurity framework and the strategy, policies and practices implemented by the organization to appropriately mitigate such risks. Such oversight includes discussions with management and the Company’s internal auditors on the magnitude and steps taken to address and mitigate any such risks. As a regular part of its meetings, risks related to cybersecurity are reviewed by the committee as part of the internal and external audit reports to the committee.

Interpublic’s senior management is responsible for assessing and managing the Company’s various exposures to risk, including those related to cybersecurity, on a day-to-day basis, including the identification of risks through a robust enterprise risk management framework and the creation of appropriate risk management programs and policies to address such risks. Our CIO and CISO have primary responsibility for managing our cybersecurity program and efforts. They work closely with key stakeholders, including internal committees such as the information security steering committee, peer institutions, and industry groups, in order to manage cybersecurity and information security risk. Our internal audit team is responsible for the testing and audit of our information-technology internal controls. In addition, leaders from our communications, finance, legal and risk teams participate in incident response training, including tabletop exercises, designed to enhance our ability to respond to cybersecurity incidents quickly, efficiently and with the appropriate degree of urgency. More generally, our Executive Risk Committee has primary responsibility for overseeing the Company’s risk framework and the material risks facing our Company.

We believe our information technology team to be well-qualified in this area. These qualifications include collective decades of professional experience in the field, in both private enterprise and government, and training and certification such as Digital Directors Network, Qualified Technical Expert training and certification, National Association of Corporate Directors (NACD) certification, Certified Information Systems Security Professional (CISSP) certification, ISO 27001 certification, and BCS certification, as well as recent participation in IT and cybersecurity programs organized by leading educational institutions with expertise in the field.

Item 2. Properties

Substantially all of our office space is leased from third parties. Certain leases are subject to rent reviews or contain escalation clauses, and certain of our leases require the payment of various operating expenses, which may also be subject to escalation. Physical properties include leasehold improvements, furniture, fixtures and equipment located in our offices. In the fourth quarter of 2022, the Company took actions to optimize our real estate footprint as a result of a shift in our hybrid model used to deliver and support our services in a post-pandemic economy. These real estate actions further reduced our occupied global real estate footprint by approximately 6.7%, or 500,000 square feet. We believe that facilities leased or owned by us are adequate for the purposes for which they are currently used and are well maintained. See the discussion under "2022 Real Estate Actions" and “2020 Restructuring Plan” in Part II, Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations for further detail and Note 3 in Part II, Item 8, Financial Statements and Supplementary Data, for further information on our lease commitments.

17

Item 3. Legal Proceedings

We are involved in various legal proceedings, and subject to investigations, inspections, audits, inquiries and similar actions by governmental authorities, arising in the normal course of our business. The types of allegations that arise in connection with such legal proceedings vary in nature, but can include claims related to contract, employment, tax and intellectual property matters. While any outcome related to litigation or such governmental proceedings in which we are involved cannot be predicted with certainty, we believe that the outcome of these matters, individually and in the aggregate, will not have a material adverse effect on our financial condition, results of operations or cash flows. See Note 16 in Item 8, Financial Statements and Supplementary Data for further information relating to our legal matters.

Item 4. Mine Safety Disclosures

Not applicable

18

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information

Our common stock is listed and traded on the New York Stock Exchange under the symbol “IPG”. As of February 15, 2024, there were approximately 7,800 registered holders of our outstanding common stock.

We announced on February 8, 2024 that our Board of Directors (the "Board") had declared a common stock cash dividend of $0.330 per share, payable on March 15, 2024 to holders of record as of the close of business on March 1, 2024. Although it is the Board's current intention to declare and pay future dividends, there can be no assurance that such additional dividends will in fact be declared and paid. Any and the amount of any such declaration is at the discretion of the Board and will depend upon factors such as our earnings, financial position and cash requirements.

Equity Compensation Plans

See Item 12 for information about our equity compensation plans.

Sales of Unregistered Securities

Not applicable.

Repurchases of Equity Securities

The following table provides information regarding our purchases of our equity securities during the period from October 1, 2023 to December 31, 2023.

	Total Number of Shares (or Units) Purchased 1	Average Price Paid per Share (or Unit) 2		Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs 3	Maximum Number (or Approximate Dollar Value) of Shares (or Units) that May Yet Be Purchased Under the Plans or Programs 3
October 1 - 31	3,950	$	27.76	—	$	211,185,785
November 1 - 30	2,106,464	$	29.49	2,105,000	$	149,106,991
December 1 - 31	2,165,959	$	31.89	2,165,000	$	80,068,304
Total	4,276,373	$	30.70	4,270,000

1The total number of shares of our common stock purchased includes shares withheld under the terms of grants under employee stock-based compensation plans to offset tax withholding obligations that arose upon vesting and release of restricted shares (the “Withheld Shares”). We repurchased 3,950 Withheld Shares in October 2023; 1,464 Withheld Shares in November 2023; and 959 Withheld Shares in December 2023, for a total of 6,373 Withheld Shares during the three-month period.

2The average price per share for each of the months in the fiscal quarter and for the three-month period was calculated by dividing (a) the sum for the applicable period of the aggregate value of the tax withholding obligations and the aggregate amount we paid for shares acquired under our share repurchase program, described in Note 7 of Item 8, Financial Statements and Supplementary Data, by (b) the sum of the number of Withheld Shares and the number of shares acquired in our share repurchase program.

3On February 8, 2023, the Board authorized a share repurchase program to repurchase from time to time up to $350.0 million, excluding fees, of our common stock. There is no expiration date associated with this share repurchase program. On February 7, 2024, the Board authorized a share repurchase program to repurchase from time to time up to $320.0, excluding fees, of our common stock, which was in addition to any amounts remaining under the 2023 share repurchase program.

We may effect our share repurchases through open market purchases, trading plans established in accordance with U.S. Securities and Exchange Commission ("SEC") rules, derivative transactions or other means. We expect to continue to repurchase our common stock in future periods, although the timing and amount of the repurchases will depend on market conditions and other funding requirements. There are no expiration dates associated with the share repurchase programs.

19

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations ("MD&A") is intended to help you understand The Interpublic Group of Companies, Inc. and its subsidiaries (the "Company," "IPG," "we," "us" or "our"). MD&A should be read in conjunction with our Consolidated Financial Statements and the accompanying notes included in this report. Our MD&A includes the following sections:

EXECUTIVE SUMMARY provides a discussion about our strategic outlook, factors influencing our business and an overview of our results of operations and liquidity.

RESULTS OF OPERATIONS provides an analysis of the consolidated and segment results of operations for 2023 compared to 2022 and 2022 compared to 2021.

LIQUIDITY AND CAPITAL RESOURCES provides an overview of our cash flows, funding requirements, contractual obligations, financing and sources of funds, and debt credit ratings.

CRITICAL ACCOUNTING ESTIMATES provides a discussion of our accounting policies that require critical judgment, assumptions and estimates.

RECENT ACCOUNTING STANDARDS, by reference to Note 17 to the Consolidated Financial Statements, provides a discussion of certain accounting standards that have been adopted during 2023 or that have not yet been required to be implemented and may be applicable to our future operations.

NON-GAAP FINANCIAL MEASURE provides a reconciliation of non-GAAP financial measure with the most directly comparable generally accepted accounting principles in the United States ("U.S. GAAP") financial measures and sets forth the reasons we believe that presentation of the non-GAAP financial measure contained therein provides useful information to investors regarding our results of operations and financial condition.

EXECUTIVE SUMMARY

Our Business

We provide marketing, communications and business transformation services that help marketers and brands succeed in today's digital economy. Combining the power of creativity and technology, our approximately 57,400 employees and operations span all major world markets. Our companies specialize in insights, data, media, creative and production, digital commerce, healthcare marketing and communications, producing marketing solutions for clients that range in scale from large global marketers to regional and local clients. Our comprehensive global services help marketers build brands, increase sales of their products and services, and gain market share.

Our capabilities span ideation to execution: growth, product and experience design; technology and experience platforms; creative, media and marketing strategy; and campaign, content and channel orchestration. The work we produce for our clients is specific to their unique needs. Our solutions vary from project-based activity to long-term, fully integrated campaigns. Our operations support the strategic position that marketers have access to the best and most appropriate resources within IPG to drive business success, and may access these capabilities from across the IPG network in an agile model called Open Architecture®. With operations in over 100 countries, we can operate in a single region or deliver global integrated programs.

We operate in a media, consumer and technology ecosystem that continues to evolve at a rapid pace. To help our clients win in a data-led and digital-first world, we have made and continue to make investments in strategic areas including digital commerce, retail media, artificial intelligence, audience resolution and production across world markets. In addition, we consistently review opportunities within our Company to enhance our operations through acquisitions and strategic alliances and internal programs that encourage client-centric collaboration. As appropriate, we also develop relationships with technology and emerging media companies that are building leading-edge marketing tools that complement our agencies' skill sets and capabilities.

Home to some of the world’s best-known and most innovative communications specialists, IPG global brands include Acxiom, Craft, FCB, FutureBrand, Golin, Huge, Initiative, IPG Health, IPG Mediabrands, Jack Morton, KINESSO, MAGNA, McCann, Mediahub, Momentum, MRM, MullenLowe Global, Octagon, R/GA, UM, Weber Shandwick and more.

Our financial goals include competitive organic growth of revenue before billable expenses and expansion of Adjusted EBITA margin, as defined and discussed within the Non-GAAP Financial Measure section of this MD&A, which we expect will further strengthen our balance sheet and total liquidity and increase value to our stakeholders. Accordingly, we remain focused on meeting the evolving needs of our clients while concurrently managing our cost structure. We continually seek greater efficiency in the delivery of our services, focusing on more effective resource utilization, including the productivity of our employees, real estate, information technology and shared services, such as finance, human resources and legal. The improvements we have made and continue to make in our financial reporting and business information systems in recent years

20

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

allow us more timely and actionable insights from our global operations. Our disciplined approach to our balance sheet and liquidity provides us with a solid financial foundation and financial flexibility to manage and grow our business. We believe that our strategy and execution position us to meet our financial goals and to deliver long-term value to all of our stakeholders.

Current Market Conditions

The macroeconomic backdrop moderated in 2023, in contrast to the robust business environment that had characterized much of 2022, as economies navigated change and uncertainty due to the COVID-19 pandemic, higher inflation, regional military conflicts and other factors. The impact of greater macroeconomic uncertainty resulted in a more cautious client operating environment, which we began to see toward the end of 2022 in the more cyclical parts of our business, and which weighed more heavily on our growth during 2023. Over the course of this period, further, several large clients in the technology & telecom client sector adopted enterprise-wide cost savings measures, one result of which was decreased expenditures on advertising and marketing that were felt across our industry and adversely impacted revenue in 2023. Notwithstanding these headwinds, several business sectors and geographic regions continued to show resilience during the year and grew from the year before. As 2023 drew to a close, we experienced a return to growth in the fourth quarter, while consumer markets and media continued to evolve at high velocity, supporting the need among large marketers for the advanced capabilities in which we specialize.

The principal macroeconomic risks to our performance include the impact of any general or regional economic slowdown or contraction, the extent of inflation of labor costs and potential for labor shortages, continuing inflationary pressures on our clients and their customers, and the economic impacts of geopolitical conflict and resulting potential for uncertainty and restrictions on spending on the part of some clients and consumers. See Item 1A, Risk Factors, in this Annual Report on Form 10-K.

Our Financial Information

When we analyze period-to-period changes in our operating performance, we determine the portion of the change that is attributable to changes in foreign currency rates and the net effect of acquisitions and divestitures, and the remainder we call organic change, which indicates how our underlying business performed. We exclude the impact of billable expenses in analyzing our operating performance as the fluctuations from period to period are not indicative of the performance of our underlying businesses and have no impact on our operating income or net income.

The change in our operating performance attributable to changes in foreign currency rates is determined by converting the prior-period reported results using the current-period exchange rates and comparing these prior-period adjusted amounts to the prior-period reported results. Although the U.S. Dollar is our reporting currency, a substantial portion of our revenues and expenses are generated in foreign currencies. Therefore, our reported results are affected by fluctuations in the currencies in which we conduct our international businesses. Our exposure is mitigated as the majority of our revenues and expenses in any given market are generally denominated in the same currency. Both positive and negative currency fluctuations against the U.S. Dollar affect our consolidated results of operations, and the magnitude of the foreign currency impact to our operations related to each geographic region depends on the significance and operating performance of the region. The foreign currencies that most adversely impacted our results during the year ended December 31, 2023 were the Argentine Peso, the Israeli Shekel, the Canadian Dollar, the Indian Rupee and the Japanese Yen. The foreign currencies that most favorably impacted our results during the year ended December 31, 2023 were the Euro and the Mexican Peso.

For purposes of analyzing changes in our operating performance attributable to the net effect of acquisitions and divestitures, transactions are treated as if they occurred on the first day of the quarter during which the transaction occurred. We continually evaluate our portfolio of businesses and over the past several years, we have acquired companies that we believe will enhance our offerings and disposed of businesses that are not consistent with our strategic plan.

The metrics that we use to evaluate our financial performance include organic change in revenue before billable expenses as well as the change in certain operating expenses, and the components thereof, expressed as a percentage of consolidated revenue before billable expenses, as well as Adjusted EBITA. These metrics are also used by management to assess the financial performance of our reportable segments, MD&E, IA&C, and SC&E. In certain of our discussions, we analyze revenue before billable expenses by geographic region and by business sector, in which we focus on our top 500 clients, which typically constitute approximately 85% of our annual consolidated revenue before billable expenses.

The Consolidated Financial Statements and MD&A presented herein reflect the latest estimates and assumptions made by us that affect the reported amounts of assets and liabilities and related disclosures as of the date of the consolidated financial statements and reported amounts of revenue and expenses during the reporting periods presented. We believe we have used reasonable estimates and assumptions to assess the fair values of the Company’s goodwill, long-lived assets and indefinite-lived intangible assets; assessment of the annual effective tax rate; valuation of deferred income taxes and the allowance for expected credit losses on future uncollectible accounts receivable. If actual market conditions vary significantly from those currently

21

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

projected, these estimates and assumptions could materially change resulting in adjustments to the carrying values of our assets and liabilities.

22

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

The following table presents a summary of our financial performance for the years ended December 31, 2023, 2022 and 2021.

	Years ended December 31,									Change
										2023 vs 2022		2022 vs 2021
Statement of Operations Data	2023			2022			2021			% Increase/ (Decrease)		% Increase/ (Decrease)
REVENUE:
Revenue before billable expenses	$	9,400.6		$	9,449.4		$	9,107.9		(0.5)	%	3.7	%
Billable expenses	1,488.7			1,478.4			1,132.8			0.7	%	30.5	%
Total revenue	$	10,889.3		$	10,927.8		$	10,240.7		(0.4)	%	6.7	%
OPERATING INCOME 1	$	1,482.6		$	1,381.2		$	1,436.2		7.3	%	(3.8)	%
Adjusted EBITA 1, 2	$	1,566.6		$	1,465.9		$	1,522.4		6.9	%	(3.7)	%
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$	1,098.4		$	938.0		$	952.8
Earnings per share available to IPG common stockholders:
Basic 1	$	2.86		$	2.40		$	2.42
Diluted 1	$	2.85		$	2.37		$	2.39
Operating Ratios
Organic change in revenue before billable expenses	(0.1)		%	7.0		%	11.9		%
Operating margin on revenue before billable expenses 1	15.8		%	14.6		%	15.8		%
Operating margin on total revenue 1	13.6		%	12.6		%	14.0		%
Adjusted EBITA margin on revenue before billable expenses 1, 2	16.7		%	15.5		%	16.7		%
Expenses as a % of revenue before billable expenses:
Salaries and related expenses	66.4		%	66.2		%	65.6		%
Office and other direct expenses	14.3		%	14.2		%	14.0		%
Selling, general and administrative expenses	0.7		%	0.9		%	1.3		%
Depreciation and amortization	2.8		%	2.9		%	3.1		%
Restructuring charges 1	0.0		%	1.1		%	0.1		%

1For the years ended December 31, 2023, 2022 and 2021, results include restructuring charges of $0.1, $102.4 and $10.6, respectively. See "Restructuring Charges" in MD&A and Note 11 of Item 8, Financial Statements and Supplementary Data for further information.

2Adjusted EBITA is a financial measure that is not defined by U.S. GAAP. Adjusted EBITA is calculated as net income available to IPG common stockholder before provision for incomes taxes, total (expenses) and other income, equity in net income of unconsolidated affiliates, net income attributable to noncontrolling interests and amortization of acquired intangibles. Refer to the Non-GAAP Financial Measure section of this MD&A for additional information and for a reconciliation to U.S. GAAP measures.

Total revenue, which includes billable expenses, decreased (0.4)% during the year ended December 31, 2023. Our organic change of revenue before billable expenses of (0.1)% for the year ended December 31, 2023 was due to net client losses and lower spending from existing clients in the technology & telecom sector and net client losses in the retail sector, partially offset by net client wins in our healthcare and financial services sectors. During the year ended December 31, 2023, our Adjusted EBITA margin on revenue before billable expenses increased to 16.7% from 15.5% in the prior-year period as the decrease in revenue before billable expenses, discussed below in the “Results of Operations” section, was outpaced by the overall decrease in our operating expenses, excluding billable expenses and amortization of acquired intangibles.

Total revenue, which includes billable expenses, increased 6.7% during the year ended December 31, 2022. Our organic increase of revenue before billable expenses of 7.0% for the year ended December 31, 2022 was driven by net higher spending

23

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

from existing clients across nearly all sectors, most notably in the healthcare, financial services, other and retail sectors, which also each increased from net client wins. During the year ended December 31, 2022, our Adjusted EBITA margin on revenue before billable expenses decreased to 15.5% from 16.7% in the prior-year period as the increase in revenue before billable expenses, discussed below in the “Results of Operations” section, was outpaced by the overall increase in our operating expenses, excluding billable expenses and amortization of acquired intangibles. Adjusted EBITA in 2022 includes $98.6 of restructuring charges related to the 2022 Real Estate Actions which had a negative 1.0% impact on Adjusted EBITA margin on revenue before billable expenses.

RESULTS OF OPERATIONS

Consolidated Results of Operations

Revenue before billable expenses

Our revenue before billable expenses is directly impacted by the retention and spending levels of existing clients and by our ability to win new clients. Most of our expenses are recognized ratably throughout the year and are therefore less seasonal than revenue. Our revenue before billable expenses is typically lowest in the first quarter and highest in the fourth quarter, reflecting the seasonal spending of our clients.

	Year ended December 31, 2022		Components of Change						Year ended December 31, 2023		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	9,449.4	$	(46.9)	$	9.0	$	(10.9)	$	9,400.6	(0.1)	%	(0.5)	%
Domestic	6,157.7		0.0		13.2		(68.7)		6,102.2		(1.1)	%	(0.9)	%
International	3,291.7		(46.9)		(4.2)		57.8		3,298.4		1.8	%	0.2	%
United Kingdom	742.2		4.0		0.0		13.0		759.2		1.8	%	2.3	%
Continental Europe	764.6		14.1		0.0		17.0		795.7		2.2	%	4.1	%
Asia Pacific	772.7		(27.0)		5.3		(21.2)		729.8		(2.7)	%	(5.6)	%
Latin America	423.6		(8.4)		(1.4)		34.9		448.7		8.2	%	5.9	%
Other	588.6		(29.6)		(8.1)		14.1		565.0		2.4	%	(4.0)	%

The (1.1)% organic decrease in our domestic market was primarily due to revenue decreases at our digital project-based offerings and advertising businesses, partially offset by revenue increases at our media businesses. In our international markets, the 1.8% organic increase was driven by revenue increases at our media businesses, public relations agencies and experiential businesses and was most notable in our Latin America and Continental Europe regions, partially offset by revenue decreases at our digital project-based offerings across all regions.

	Year ended December 31, 2021		Components of Change						Year ended December 31, 2022		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	9,107.9	$	(266.9)	$	(27.4)	$	635.8	$	9,449.4	7.0	%	3.7	%
Domestic	5,763.1		0.0		14.4		380.2		6,157.7		6.6	%	6.8	%
International	3,344.8		(266.9)		(41.8)		255.6		3,291.7		7.6	%	(1.6)	%
United Kingdom	781.5		(79.7)		0.0		40.4		742.2		5.2	%	(5.0)	%
Continental Europe	799.7		(90.6)		0.0		55.5		764.6		6.9	%	(4.4)	%
Asia Pacific	791.4		(57.4)		(4.1)		42.8		772.7		5.4	%	(2.4)	%
Latin America	396.4		(19.4)		(4.6)		51.2		423.6		12.9	%	6.9	%
Other	575.8		(19.8)		(33.1)		65.7		588.6		11.4	%	2.2	%

The 6.6% organic increase in our domestic market was primarily driven by growth in our advertising and media businesses in addition to our experiential businesses and public relations agencies, as well as data management and analytics. In our international markets, the 7.6% organic increase was primarily driven by strong performance at our media, advertising and experiential businesses and our public relations agencies across all geographic regions.

Refer to the segment discussion later in this MD&A for information on changes in revenue by segment.

24

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Salaries and Related Expenses

	Years ended December 31,									Change
										2023 vs 2022		2022 vs 2021
	2023			2022			2021			% Increase/ (Decrease)		% Increase/ (Decrease)
Salaries and related expenses	$	6,243.9		$	6,258.3		$	5,975.4		(0.2)	%	4.7	%
As a % of revenue before billable expenses:
Salaries and related expenses	66.4		%	66.2		%	65.6		%
Base salaries, benefits and tax	58.1		%	56.6		%	53.4		%
Incentive expense	2.7		%	3.6		%	5.2		%
Severance expense	1.3		%	0.8		%	0.9		%
Temporary help	3.3		%	4.1		%	4.8		%
All other salaries and related expenses	1.0		%	1.1		%	1.3		%

Revenue before billable expenses decrease of (0.5)% outpaced the overall decrease in salaries and related expenses of (0.2)% during the year ended December 31, 2023 as compared to the prior-year period. The decrease in salaries and related expenses was primarily driven by decreases in performance-based employee incentive compensation and temporary help expense, partially offset by increases in base salaries, benefits and tax and severance expense.

Revenue before billable expenses growth of 3.7% was outpaced by the increase in salaries and related expenses of 4.7% during the year ended December 31, 2022 as compared to the prior-year period, primarily driven by increases in base salaries, benefits and tax, partially offset by decreased performance-based employee incentive compensation and temporary help expense.

Office and Other Direct Expenses

	Years ended December 31,									Change
										2023 vs 2022		2022 vs 2021
	2023			2022			2021			% Increase/ (Decrease)		% Increase/ (Decrease)
Office and other direct expenses	$	1,342.5		$	1,346.4		$	1,279.6		(0.3)	%	5.2	%
As a % of revenue before billable expenses:
Office and other direct expenses	14.3		%	14.2		%	14.0		%
Occupancy expense	4.6		%	4.8		%	5.0		%
All other office and other direct expenses 1	9.7		%	9.4		%	9.0		%

1Includes production expenses, travel and entertainment, professional fees, spending to support new business activity, telecommunications, office supplies, bad debt expense, adjustments to contingent acquisition obligations, foreign currency losses (gains) and other expenses.

Office and other direct expenses decreased (0.3)% compared to our revenue before billable expenses decrease of (0.5)% during the year ended December 31, 2023 as compared to the prior-year period. The decrease in office and other direct expenses was driven by decreases in employment costs, occupancy expense and client service costs, partially offset by increases in bad debt expense, travel and entertainment expenses and software and cloud-based expenses, as well as foreign currency losses.

Office and other direct expenses increased by 5.2% compared to our revenue before billable expenses increase of 3.7% during the year ended December 31, 2022 as compared to the prior-year period. The increase in office and other direct expenses was related to increases in travel and entertainment expenses, professional consulting fees as well as expenses related to client service costs and company meetings and conferences, partially offset by a decrease in occupancy expense and a reduction in the year-over-year change in contingent acquisition obligations.

25

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Selling, General and Administrative Expenses

Selling, general and administrative expenses ("SG&A") are primarily the unallocated expenses of our Corporate and other group, as detailed further in the segment discussion later in this MD&A, excluding depreciation and amortization. SG&A decreased in 2023 as compared to the prior-year period, primarily driven by decreases in performance-based incentive compensation expense, partially offset by increases in software and cloud-based expenses.

SG&A decreased in 2022 as compared to the prior-year period, primarily due to a decrease in performance-based incentive compensation expense, partially offset by an increase in professional consulting fees.

Depreciation and Amortization

For the years ended December 31, 2023, 2022 and 2021, depreciation and amortization was $180.3, $189.3 and $197.6, respectively. For the years ended December 31, 2023, 2022 and 2021, amortization of acquired intangibles was $84.0, $84.7 and $86.2, respectively.

Restructuring Charges

	Years ended December 31,
	20231		20222		20213
Severance and termination costs	$	0.4	$	(0.1)	$	0.4
Lease restructuring costs	(1.2)		85.4		6.3
Other restructuring costs	0.9		17.1		3.9
Total restructuring charges	$	0.1	$	102.4	$	10.6

1The amounts for the year ended December 31, 2023 represent adjustments to the 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020.

2The amounts for the year ended December 31, 2022 represent 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020. The 2022 Real Estate Actions did not include any severance and termination costs.

3The amounts for the year ended December 31, 2021 represent adjustments to the actions taken in 2020.

Lease and Other restructuring costs include impairments of operating lease right-of-use assets and associated leasehold improvements, furniture and asset retirement obligations. Lease impairments were calculated based on estimated fair values using market participant assumptions including forecasted net discounted cash flows related to the operating lease right-of-use assets.

2022 Real Estate Actions

In the fourth quarter of 2022, the Company took Real Estate Actions related to new real estate exits and lease terminations to further optimize the real estate footprint supporting our office-home hybrid service model in a post-pandemic economy. All included opportunities for further efficiencies as a result of the current working environment were identified and completed during the fourth quarter of 2022.

These Real Estate Actions, taken during the fourth quarter of 2022, reduced our occupied global real estate footprint by approximately 6.7% or 500,000 square feet. All restructuring actions were identified and initiated in 2022, with all actions completed by the end of the fourth quarter of 2022.

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2023 is as follows:

			2022 Real Estate Actions
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Lease impairment costs	$	0.0	$	(0.9)	$	(0.9)	$	0.0	$	0.0
Other restructuring costs	0.0		0.8		0.2		0.6		0.0
Total	$	0.0	$	(0.1)	$	(0.7)	$	0.6	$	0.0

26

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2022 is as follows:

	2022 Real Estate Actions
	Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Lease impairment costs	$	84.4	$	84.4	$	0.0	$	0.0
Other restructuring costs	14.2		13.5		0.7		0.0
Total	$	98.6	$	97.9	$	0.7	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions by segment is as follows:

	Years ended December 31,
	2023		2022
Restructuring charges:
MD&E	$	(1.0)	$	69.0
IA&C	(0.3)		21.0
SC&E	1.1		8.0
Corporate and other	0.1		0.6
Total	$	(0.1)	$	98.6
Non cash lease impairment costs:
MD&E	$	(1.0)	$	54.3
IA&C	(0.5)		22.3
SC&E	0.4		7.0
Corporate and other	0.2		0.8
Total	$	(0.9)	$	84.4

2020 Restructuring Plan

Beginning in the second quarter of 2020, the Company took restructuring actions to lower its operating expenses structurally and permanently relative to revenue and to accelerate the transformation of our business (the “2020 Plan”).

All restructuring actions were identified and initiated in 2020, with all actions completed by the end of the fourth quarter of 2020 and were based on our experience and learning in the COVID-19 pandemic and a resulting review of our operations to address certain operating expenses such as occupancy expense and salaries and related expenses.

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2023 is as follows:

	2020 Plan
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Severance and termination costs	$	2.3	$	0.4	$	0.0	$	2.1	$	0.6
Lease impairment costs	0.0		(0.3)		(0.3)		0.0		0.0
Other restructuring costs	0.0		0.1		0.1		0.0		0.0
Total	$	2.3	$	0.2	$	(0.2)	$	2.1	$	0.6

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2022 is as follows:

27

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

	2020 Plan
	Liability at December 31, 2021		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Severance and termination costs	$	9.4	$	(0.1)	$	0.0	$	7.0	$	2.3
Lease impairment costs	0.0		1.0		1.0		0.0		0.0
Other restructuring costs	0.0		2.9		2.9		0.0		0.0
Total	$	9.4	$	3.8	$	3.9	$	7.0	$	2.3

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2021 is as follows:

	2020 Plan
	Liability at December 31, 2020		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2021
Severance and termination costs	$	74.6	$	0.4	$	0.3	$	65.3	$	9.4
Lease impairment costs	0.0		6.3		6.3		0.0		0.0
Other restructuring costs	0.0		3.9		3.2		0.7		0.0
Total	$	74.6	$	10.6	$	9.8	$	66.0	$	9.4

A summary of the restructuring activities related to the 2020 Plan by segment is as follows:

	Years ended December 31,
	2023		2022		2021
Restructuring charges:
MD&E	$	(0.3)	$	0.1	$	0.1
IA&C	0.5		7.7		2.6
SC&E	0.0		(4.2)		10.0
Corporate and other	0.0		0.2		(2.1)
Total	$	0.2	$	3.8	$	10.6
Non cash lease impairment costs:
MD&E	$	(0.3)	$	0.0	$	(0.9)
IA&C	0.0		7.0		(0.1)
SC&E	0.0		(5.9)		7.3
Corporate and other	0.0		(0.1)		0.0
Total	$	(0.3)	$	1.0	$	6.3

EXPENSES AND OTHER INCOME

	Years ended December 31,
	2023		2022		2021
Cash interest on debt obligations	$	(223.2)	$	(164.3)	$	(165.6)
Non-cash interest	(2.4)		(3.6)		(5.0)
Interest expense	(225.6)		(167.9)		(170.6)
Interest income	140.8		56.6		27.2
Net interest expense	(84.8)		(111.3)		(143.4)
Other income (expense), net	10.2		(1.0)		(70.7)
Total (expenses) and other income	$	(74.6)	$	(112.3)	$	(214.1)

Net Interest Expense

28

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Net interest expense decreased by $26.5 in 2023 compared to a year ago, primarily attributable to higher interest rates on net deposits, partially offset by lower net cash balances. Net interest expense decreased by $32.1 in 2022 as compared to 2021, primarily attributable to decreased cash interest expense as a result of our $500.0 in aggregate principal amount 3.750% unsecured senior notes that matured in the fourth quarter of 2021 and higher interest yield on our cash deposits, partially offset by higher interest expense on bank overdrafts, resulting in increased interest income.

Other Income (Expense), Net

Results of operations include certain items that are not directly associated with our revenue-producing operations.

	Years ended December 31,
	2023		2022		2021
Net gains/(losses) on sales of businesses	$	17.9	$	(11.3)	$	(19.4)
Loss on early extinguishment of debt	0.0		0.0		(74.0)
Other	(7.7)		10.3		22.7
Total other income (expense), net	$	10.2	$	(1.0)	$	(70.7)

Net gains/(losses) on sales of businesses – During 2023, 2022 and 2021, the amounts recognized were related to sales of businesses and the classification of certain assets and liabilities, consisting primarily of accounts receivable and accounts payable, as held for sale within our MD&E, IA&C, and SC&E reportable segments. The businesses held for sale as of year-end primarily represent unprofitable, non-strategic agencies which are expected to be sold within the next twelve months. The sales of businesses and the classification of certain assets and liabilities as held for sale included cash, net of proceeds, of $58.7, $(22.4) and $(13.3) for the years ended 2023, 2022 and 2021, respectively, which is classified within the Proceeds from sale of businesses, net of cash sold line in our Consolidated Statements of Cash Flows in Item 8, Financial Statements and Supplementary Data.

Loss on early extinguishment of debt – During the first quarter of 2021, we recorded a loss of $74.0 related to the early extinguishment of all $250.0 in aggregate principal amount of our 4.000% Senior Notes, all $500.0 in aggregate principal amount of our 3.750% Senior Notes, and $250.0 of the $500.0 in aggregate principal amount of our 4.200% Senior Notes.

Other – During 2023, the majority of the amounts recognized were primarily related to pension and postretirement costs. During 2022, the majority of the amounts recognized were primarily related to a cash gain from the sale of an equity investment, partially offset by a non-cash loss related to the deconsolidation of a previously consolidated entity in which we maintain an equity interest. During 2021, the majority of the amounts recognized were related to a non-cash gain related to the deconsolidation of a previously consolidated entity in which we maintain an equity interest, and pension and postretirement costs.

INCOME TAXES

	Years ended December 31,
	2023			2022			2021
Income before income taxes	$	1,408.0		$	1,268.9		$	1,222.1
Provision for income taxes	$	291.2		$	318.4		$	251.8
Effective income tax rate	20.7		%	25.1		%	20.6		%

Effective Tax Rate

Our tax rates are affected by many factors, including our worldwide earnings from various countries, changes in legislation and tax characteristics of our income.

In 2023, our effective income tax rate of 20.7% was positively impacted by a benefit of $64.2 related to the settlement of the 2017 and 2018 U.S. Federal income tax audit. The effective rate also benefited from the net release of previously recorded reserves for various other tax contingencies, and the excess tax benefits on employee share-based payments, the majority of which were recognized in the first quarter due to the timing of the vesting of awards.

The OECD's global tax reform initiative (known as Pillar 2) is aimed at ensuring multinational enterprises pay a minimum level of tax in all countries in which they operate, beginning with 2024. The adoption of these guidelines is not expected to have a material impact on our current and deferred tax positions in 2024.

29

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

In 2022, our effective income tax rate of 25.1% was adversely impacted by the establishment of net valuation allowances primarily in Continental Europe, and by net losses on sales of businesses and the classification of certain assets as held for sale for which we received minimal tax benefit. This was partially offset by excess tax benefits on employee share-based payments, the majority of which were recognized in the first quarter due to the timing of the vesting of awards and by the release of previously recorded reserves for tax contingencies.

In August 2022, the U.S. enacted the Inflation Reduction Act of 2022 (“IRA”), which creates a new book minimum tax of at least 15% of consolidated GAAP pre-tax income for corporations with average book income in excess of $1 billion. The book minimum tax will first apply to our 2023 year. We do not expect an increase in our tax liability from this new book minimum tax in 2023. The IRA also creates an excise tax of 1% of the value of any stock repurchased by IPG after December 31, 2022. We expect to be subject to this new excise tax, but the amount will vary depending on various factors, including the amount and frequency of any stock issuances and repurchases. As a result of the IRA, tax associated with share repurchases will be included as part of the cost basis of the shares repurchased and recorded as an adjustment to treasury stock.

In 2021, our effective income tax rate of 20.6% was positively impacted by the reversal of valuation allowances primarily in Continental Europe. This was partially offset by net losses on sales of businesses and the classification of certain assets as held for sale for which we received minimal tax benefit.

See Note 9 in Item 8, Financial Statements and Supplementary Data for further information.

EARNINGS PER SHARE

Basic earnings per share available to IPG common stockholders for the years ended December 31, 2023, 2022 and 2021 were $2.86, $2.40 and $2.42 per share, respectively. Diluted earnings per share available to IPG common stockholders for the years ended December 31, 2023, 2022 and 2021 were $2.85, $2.37 and $2.39 per share, respectively.

Basic and diluted earnings per share for the year ended December 31, 2023 included positive impacts of $0.17 related to the settlement of U.S. Federal Income Tax Audits for the years 2017-2018 and $0.03 from a net gain on a completed disposition and the classification of certain assets, as held for sale as well as a loss related to the sale of an equity investment, partially offset by a negative impact of $0.17 from the amortization of acquired intangibles.

Basic and diluted earnings per share for the year ended December 31, 2022 included a negative impact of $0.17 from the amortization of acquired intangibles, negative impacts of $0.20 and $0.19, respectively, from restructuring charges, a negative impact of $0.03 from net losses on sales of businesses and the classification of certain assets as held for sale, a negative impact of $0.01 from the deconsolidation of a previously consolidated entity and a negative impact of $0.02 related to the net set-up of income tax valuation allowances, partially offset by a positive impact of $0.03 from the sale of an equity investment.

Basic and diluted earnings per share for the year ended December 31, 2021 included negative impacts of $0.18 and $0.17, respectively, from the amortization of acquired intangibles, a negative impact of $0.02 from restructuring charges, a negative impact of $0.04 from net losses on sales of businesses and the classification of certain assets as held for sale, a negative impact of $0.14 from the loss on early extinguishment of debt, partially offset by a positive impact of $0.15 related to income tax valuation allowance reversals and a positive impact of $0.01 from the deconsolidation of a previously consolidated entity.

Segment Results of Operations

As discussed in Note 15 in Item 8, Financial Statements and Supplementary Data, we have three reportable segments as of December 31, 2023: MD&E, IA&C and SC&E. We also report results for the "Corporate and other" group. Segment information for the prior period has been recast to conform to the current-period presentation.

Media, Data & Engagement Solutions

Revenue before billable expenses

	Year ended December 31, 2022		Components of Change						Year ended December 31, 2023		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	4,296.9	$	(19.9)	$	54.0	$	(4.5)	$	4,326.5	(0.1)	%	0.7	%
Domestic	2,690.9		—		44.2		(31.6)		2,703.5		(1.2)	%	0.5	%
International	1,606.0		(19.9)		9.8		27.1		1,623.0		1.7	%	1.1	%

The organic change was relatively flat and mainly attributable to net client losses and lower spending from existing clients in our technology & telecom sector, partially offset by net client wins in our healthcare and financial services sectors. The (1.2)% organic decrease in our domestic market was due to revenue decreases at our digital project-based offerings as well as

30

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

data management and analytics, partially offset by revenue increases at our media businesses. In our international markets, the 1.7% organic increase was driven by revenue increases at our media businesses primarily in the Latin America and Continental Europe regions, partially offset by decreases at our digital project-based offerings across all regions.

	Year ended December 31, 2021		Components of Change						Year ended December 31, 2022		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	4,117.7	$	(132.2)	$	17.1	$	294.3	$	4,296.9	7.1	%	4.4	%
Domestic	2,552.0		—		14.4		124.5		2,690.9		4.9	%	5.4	%
International	1,565.7		(132.2)		2.7		169.8		1,606.0		10.8	%	2.6	%

The organic increase was mainly attributable to net client wins in our financial services sector and net higher spending from existing clients in our retail and other sectors. The 4.9% organic increase in our domestic market was driven by increases at our media businesses and data management and analytics. In our international markets, the 10.8% organic increase was driven by growth across all disciplines, primarily at our media businesses, and was most notable in the Continental Europe, Latin America and Asia Pacific regions.

Segment EBITA

	Years ended December 31,									Change
	2023			2022			2021			2023 vs 2022		2022 vs 2021
Segment EBITA 1	$	832.4		$	744.5		$	865.3		11.8	%	(14.0)	%
Segment EBITA margin on revenue before billable expenses 1	19.2		%	17.3		%	21.0		%

1Segment EBITA and Segment EBITA margin on revenue before billable expenses include $(1.3), $69.1 and $0.1 of restructuring charges in the year ended December 31, 2023, 2022 and 2021 respectively. See "Restructuring Charges" in MD&A and Note 11 of Item 8, Financial Statements and Supplementary Data for further information.

Segment EBITA margin increased during 2023 when compared to 2022, as the increase in revenue before billable expenses, outpaced the overall decrease in our operating expenses, excluding billable expenses and amortization of acquired intangibles. Revenue before billable expenses growth of 0.7% was outpaced by the increase in salaries and related expenses as compared to the prior-year period, primarily due to increases in base salaries, benefits and tax and severance expense, partially offset by decreases in temporary help expense and performance-based incentive compensation. Office and other direct expense decreased driven by decreases in occupancy expense and client service costs, partially offset by increases in professional consulting fees and foreign currency losses. Depreciation and amortization, excluding amortization of acquired intangibles, as a percentage of segment revenue before billable expenses decreased slightly to 2.4% in 2023 from the prior-year period.

Segment EBITA margin decreased during 2022 when compared to 2021, as the increase in revenue before billable expenses, was outpaced by the overall increase in our operating expenses, excluding billable expenses and amortization of acquired intangibles, primarily due to an increase in restructuring charges in 2022. Revenue before billable expenses growth of 4.4% was outpaced by the increase in salaries and related expenses as compared to the prior-year period, primarily driven by increases in base salaries, benefits and tax, which was driven by hiring to support revenue growth, partially offset by decreases in performance-based incentive compensation and temporary help expense. Office and other direct expense increased due to increases in travel and entertainment expenses, as well as expenses related to company meetings and conferences and professional consulting fees, partially offset by a decrease in occupancy expense. Depreciation and amortization, excluding amortization of acquired intangibles, as a percentage of segment revenue before billable expenses decreased slightly to 2.5% in 2022 from the prior-year period.

31

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Integrated Advertising & Creativity Led Solutions

Revenue before billable expenses

	Year ended December 31, 2022		Components of Change						Year ended December 31, 2023		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	3,766.3	$	(25.1)	$	(44.4)	$	(63.6)	$	3,633.2	(1.7)	%	(3.5)	%
Domestic	2,483.7		—		(30.4)		(69.5)		2,383.8		(2.8)	%	(4.0)	%
International	1,282.6		(25.1)		(14.0)		5.9		1,249.4		0.5	%	(2.6)	%

The organic decrease was due to lower spending from existing clients and net client losses in our technology & telecom and retail sectors as well as lower spending from existing clients in our financial services sector, partially offset by net client wins in the healthcare and auto & transportation sectors. The (2.8)% organic decrease in our domestic market was due to revenue decreases in our advertising businesses. In our international markets, the 0.5% organic increase was driven by revenue increases in our advertising businesses primarily in the Other Region, led by the Middle East, and Latin America regions, partially offset by revenue decreases in the Asia Pacific region.

	Year ended December 31, 2021		Components of Change						Year ended December 31, 2022		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	3,679.7	$	(99.9)	$	(43.0)	$	229.5	$	3,766.3	6.2	%	2.4	%
Domestic	2,306.0		—		—		177.7		2,483.7		7.7	%	7.7	%
International	1,373.7		(99.9)		(43.0)		51.8		1,282.6		3.8	%	(6.6)	%

The organic increase was mainly attributable to a combination of net higher spending from existing clients and net client wins in our healthcare, other and financial services sectors. The 7.7% organic increase in our domestic market was driven by growth in our advertising businesses. In our international markets, the 3.8% organic increase was driven by growth in our advertising businesses, and was most notable in the Other region led by the Middle East and Canada.

Segment EBITA

	Years ended December 31,									Change
	2023			2022			2021			2023 vs 2022		2022 vs 2021
Segment EBITA 1	$	541.3		$	581.4		$	597.9		(6.9)	%	(2.8)	%
Segment EBITA margin on revenue before billable expenses 1	14.9		%	15.4		%	16.2		%

1Segment EBITA and Segment EBITA margin on revenue before billable expenses include $0.2, $28.7 and $2.6 of restructuring charges in the year ended December 31, 2023, 2022 and 2021 respectively. See "Restructuring Charges" in MD&A and Note 11 of Item 8, Financial Statements and Supplementary Data for further information.

Segment EBITA margin decreased during 2023 when compared to 2022, as the decrease in revenue before billable expenses, exceeded the overall decrease in our operating expenses, excluding billable expenses and amortization of acquired intangibles. The decrease in salaries and related expenses, as compared to the prior-year period, was primarily driven by decreases in temporary help expense and performance-based incentive compensation, partially offset by increases in severance expense and base salaries, benefits and tax. The decrease in office and other direct expense, as compared to the prior year period, was mainly driven by decreases in employment costs and occupancy expense, partially offset by increases in bad debt expense and foreign currency losses. Depreciation and amortization, excluding amortization of acquired intangibles, as a percentage of segment revenue before billable expenses decreased slightly to 1.5% in 2023 from the prior-year period.

32

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Segment EBITA margin decreased during 2022 when compared to 2021, as the increase in revenue before billable expenses, was outpaced by the overall increase in our operating expenses, excluding billable expenses and amortization of acquired intangibles, primarily due to an increase in restructuring charges in 2022. Revenue before billable expenses growth of 2.4% was outpaced by the increase in salaries and related expenses as compared to the prior-year period, primarily driven by increases in base salaries, benefits and tax, which was driven by hiring to support revenue growth, partially offset by decreases in performance-based incentive compensation and temporary help expense. Office and other direct expense increased due to increases in travel and entertainment expense, client service costs and new business development, partially offset by decreases in occupancy expense and professional consulting fees and a reduction in the year-over-year change in contingent acquisition obligations. Depreciation and amortization, excluding amortization of acquired intangibles, as a percentage of segment revenue before billable expenses decreased to 1.6% in 2022 from the prior-year period.

Specialized Communications & Experiential Solutions

Revenue before billable expenses

	Year ended December 31, 2022		Components of Change						Year ended December 31, 2023		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	1,386.2	$	(1.9)	$	(0.6)	$	57.2	$	1,440.9	4.1	%	3.9	%
Domestic	983.1		—		(0.6)		32.4		1,014.9		3.3	%	3.2	%
International	403.1		(1.9)		0.0		24.8		426.0		6.2	%	5.7	%

The organic increase was mainly attributable to net client wins and increased spending from existing clients in our healthcare, other, food & beverage and auto & transportation sectors, partially offset by lower spending from existing clients and net client losses in our technology & telecom sector. The 3.3% organic increase in our domestic market was driven by revenue increases at our public relations agencies and experiential businesses. In our international market, the 6.2% organic increase was driven by growth at both our public relations agencies and experiential businesses across all regions.

	Year ended December 31, 2021		Components of Change						Year ended December 31, 2022		Change
			Foreign Currency		Net Acquisitions/ (Divestitures)		Organic				Organic		Total
Consolidated	$	1,310.5	$	(34.8)	$	(1.5)	$	112.0	$	1,386.2	8.5	%	5.8	%
Domestic	905.1		—		0.0		78.0		983.1		8.6	%	8.6	%
International	405.4		(34.8)		(1.5)		34.0		403.1		8.4	%	(0.6)	%

The organic increase was mainly attributable to net higher spending from existing clients in our technology & telecom, auto & transportation and food & beverage sectors and net client wins in our healthcare sector. The 8.6% organic increase in our domestic market was driven by revenue increases at both our experiential businesses and public relations agencies. In our international market, the 8.4% organic increase was driven by growth at both our experiential businesses and public relations agencies, and was most notable in the United Kingdom, Asia Pacific and Continental Europe regions.

Segment EBITA

	Years ended December 31,									Change
	2023			2022			2021			2023 vs 2022		2022 vs 2021
Segment EBITA 1	$	265.2		$	234.5		$	188.6		13.1	%	24.3	%
Segment EBITA margin on revenue before billable expenses 1	18.4		%	16.9		%	14.4		%

1Segment EBITA and Segment EBITA margin on revenue before billable expenses include $1.1, $3.8 and $10.0 of restructuring charges in the year ended December 31, 2023, 2022 and 2021 respectively. See "Restructuring Charges" in MD&A and Note 11 of Item 8, Financial Statements and Supplementary Data for further information.

33

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Segment EBITA margin increased during 2023 when compared to 2022, as the increase in revenue before billable expenses, outpaced the overall increase in our operating expenses, excluding billable expenses and amortization of acquired intangibles. The increase in salaries and related expenses, as compared to the prior-year period, was primarily due to an increase in base salaries, benefits and tax and severance expense. Office and other direct expense increased mainly due to foreign currency losses and increases in travel and entertainment expenses, the year-over-year change in contingent acquisition obligations and client service costs, partially offset by decreases in occupancy expense. Depreciation and amortization, excluding amortization of acquired intangibles, as a percentage of segment revenue before billable expenses decreased slightly to 1.1% in 2023 from the prior-year period.

Segment EBITA margin increased during 2022 when compared to 2021, as the increase in revenue before billable expenses, outpaced the overall increase in our operating expenses, excluding billable expenses and amortization of acquired intangibles. Revenue before billable expenses growth of 5.8% outpaced the increase in salaries and related expenses as compared to the prior-year period which was primarily driven by increases in base salaries, benefits and tax, driven by hiring to support revenue growth, offset by decreased performance-based incentive compensation and severance expense. Office and other direct expense increased due to increases in travel and entertainment expenses and new business development, offset by a reduction in the year-over-year change in contingent acquisition obligations as well as decreases in occupancy expense and professional consulting fees. Depreciation and amortization, excluding amortization of acquired intangibles, as a percentage of segment revenue before billable expenses decreased to 1.2% in 2022 from the prior-year period.

CORPORATE AND OTHER

Our corporate and other segment is primarily comprised of selling, general and administrative expenses, discussed in the Results of Operations section, including corporate office expenses as well as shared service center and certain other centrally managed expenses that are not fully allocated to operating divisions; salaries, long-term incentives, annual bonuses and other miscellaneous benefits for corporate office employees; professional fees related to internal control compliance, financial statement audits and legal, information technology and other consulting services that are engaged and managed through the corporate office; and rental expense for properties occupied by corporate office employees. A portion of centrally managed expenses is allocated to operating divisions based on a formula that uses the planned revenues of each of the operating units. Amounts allocated also include specific charges for information technology-related projects, which are allocated based on utilization.

Corporate and other expenses decreased by $22.2 to $72.3 during the year ended December 31, 2023 as compared to 2022, primarily attributable to decreases in selling, general and administrative expenses. Corporate and other expenses in 2022 decreased by $34.9 to $94.5 compared to 2021, primarily attributable to decreases in selling, general and administrative expenses, partially offset by an increase in restructuring charges.

During the years ended December 31, 2023, 2022 and 2021 corporate and other expense includes $0.1, $0.8 and $(2.1) of restructuring charges, respectively. See "Restructuring Charges" in MD&A and Note 11 of Item 8, Financial Statements and Supplementary Data for further information.

LIQUIDITY AND CAPITAL RESOURCES

CASH FLOW OVERVIEW

The following tables summarize key financial data relating to our liquidity, capital resources and uses of capital.

	Years ended December 31,
Cash Flow Data	2023		2022		2021
Net income	$	1,118.1	$	956.1	$	972.8
Adjustments to reconcile to net cash provided by operating activities 1	333.3		417.6		458.7
Net cash (used in) provided by working capital 2	(676.1)		(672.3)		743.4
Changes in other non-current assets and liabilities	(220.6)		(59.3)		(99.3)
Net cash provided by operating activities	$	554.7	$	642.1	$	2,075.6
Net cash used in investing activities	(85.4)		(430.1)		(185.3)
Net cash used in financing activities	(634.3)		(899.4)		(1,084.2)

1Consists primarily of depreciation and amortization of fixed assets and intangible assets, amortization of restricted stock and other non-cash compensation, net (gains) losses on sales of businesses and provision for uncollectible receivables.

2Reflects changes in accounts receivable, other current assets, accounts payable, accrued liabilities and contract liabilities. 

34

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Operating Activities

The presentation of the three components of net cash provided by operating activities above reflects the manner in which management views and analyzes this information. Management believes this presentation is useful as it presents cash provided by operating activities separately from the impact of changes in working capital, which is seasonal in nature and is impacted by the timing of media buying on behalf of our clients. Additionally, we view changes in other non-current assets and liabilities separately, as these items are not impacted by the factors described below.

Due to the seasonality of our business, we typically use cash from working capital in the first nine months of a year, with the largest impact in the first quarter, and generate cash from working capital in the fourth quarter, driven by the seasonally strong media spending by our clients. Quarterly and annual working capital results are impacted by the fluctuating annual media spending budgets of our clients as well as their changing media spending patterns throughout each year across various countries.

The timing of media buying on behalf of our clients across various countries affects our working capital and operating cash flow and can be volatile. In most of our businesses, our agencies enter into commitments to pay production and media costs on behalf of clients. To the extent possible, we pay production and media charges after we have received funds from our clients. The amounts involved, which substantially exceed our revenues, primarily affect the level of accounts receivable, accounts payable, accrued liabilities and contract liabilities. Our assets include both cash received and accounts receivable from clients for these pass-through arrangements, while our liabilities include amounts owed on behalf of clients to media and production suppliers. Our accrued liabilities are also affected by the timing of certain other payments. For example, while annual cash incentive awards are accrued throughout the year, they are generally paid during the first quarter of the subsequent year.

Net cash provided by operating activities during 2023 was $554.7, which was a decrease of $87.4 as compared to 2022. The decrease was primarily driven by an increase in pension contributions and decreases in non-current liabilities, partially offset by an increase in net income of $162.0. Working capital in 2023 was primarily impacted by client spending and timing of collections and payments.

Net cash provided by operating activities during 2022 was $642.1, which was a decrease of $1,433.5 as compared to 2021. The decrease was primarily driven by an increase in our working capital use and this comparison includes $672.3 used in working capital in 2022, compared with $743.4 generated from working capital in 2021. Working capital in 2022 was primarily impacted by client spending and timing of collections and payments.

Investing Activities

Net cash used in investing activities during 2023 consisted primarily of payments for capital expenditures of $179.3 which were related mostly to computer software and hardware, and the purchase of short-term marketable securities of $97.6. This was partially offset by the maturity of short-term marketable securities of $100.7 and proceeds from the sale of businesses, net of cash sold of $58.7.

Net cash used in investing activities during 2022 consisted primarily of payments for acquisitions, net of cash acquired, of $232.2 primarily related to the acquisition of RafterOne which closed on October 3, 2022, as well as payments for capital expenditures of $178.1, related mostly to computer software and hardware.

Financing Activities

Net cash used in financing activities during 2023 was $634.3, primarily driven by the payment of common stock dividends of $479.1 and common stock repurchases of $350.2, partially offset by net proceeds of $296.3 from the issuance of our $300.0 aggregate principal amount of 5.375% unsecured senior notes due 2033 (the "5.375% Senior Notes"). See Note 4 in Item 8, Financial Statements and Supplementary Data, for further information.

Net cash used in financing activities during 2022 was driven primarily by payments for common stock dividends of $457.3 and common stock repurchases of $320.1, as well as the settlement of a senior note.

Foreign Exchange Rate Changes

The effect of foreign exchange rate changes on cash, cash equivalents and restricted cash included in the Consolidated Statements of Cash Flows resulted in a net increase of $7.0 in 2023. This increase was primarily a result of the U.S. dollar being weaker than several foreign currencies, including the Euro.

The effect of foreign exchange rate changes on cash, cash equivalents and restricted cash included in the Consolidated Statements of Cash Flows resulted in a net decrease of $31.7 in 2022.

35

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

LIQUIDITY OUTLOOK

We expect our cash flow from operations and existing cash and cash equivalents to be sufficient to meet our anticipated operating requirements at a minimum for the next twelve months. We also have a commercial paper program, a committed corporate credit facility, and uncommitted lines of credit to support our operating needs. Borrowings under our commercial paper program are supported by our committed corporate credit agreement. We continue to maintain a disciplined approach to managing liquidity, with flexibility over significant uses of cash, including our capital expenditures, cash used for new acquisitions, our common stock repurchase program and our common stock dividends.

From time to time, we evaluate market conditions and financing alternatives for opportunities to raise additional funds or otherwise improve our liquidity profile, enhance our financial flexibility and manage market risk. Our ability to access the capital markets depends on a number of factors, which include those specific to us, such as our credit ratings, and those related to the financial markets, such as the amount or terms of available credit. There can be no guarantee that we would be able to access new sources of liquidity, or continue to access existing sources of liquidity, on commercially reasonable terms, or at all.

Funding Requirements

Our most significant funding requirements include our operations, non-cancelable operating lease obligations, capital expenditures, acquisitions, common stock dividends, taxes and debt service. Additionally, we may be required to make payments to minority shareholders in certain subsidiaries if they exercise their options to sell us their equity interests.

Notable funding requirements include:

•Debt service – Our 4.200% Senior Notes in aggregate principal amount of $250.0 mature on April 15, 2024. We expect to use available cash to fund the principal repayment. As of December 31, 2023, we had outstanding short-term borrowings of $34.2 from our uncommitted lines of credit used primarily to fund short-term working capital needs. The remainder of our debt is primarily long-term, with maturities scheduled from 2024 through 2048.

•Acquisitions – We paid cash of $2.6, net of cash acquired, for acquisitions completed as of December 31, 2023, as well as $3.7 in relation to adjustments made to upfront payments related to prior year acquisitions. We paid deferred payments of $15.6 for prior-year acquisitions as well as ownership increases in our consolidated subsidiaries. In addition to potential cash expenditures for new acquisitions, we expect to pay approximately $3.0 over the next twelve months related to all completed acquisitions as of December 31, 2023. We may also be required to pay approximately $4.0 related to redeemable non-controlling interest held by minority shareholders if exercised, over the next twelve months. We will continue to evaluate strategic opportunities to grow and continue to strengthen our market position, particularly in our digital and marketing services offerings, and to expand our presence in high-growth and key strategic world markets.

•Dividends – During 2023, we paid four quarterly cash dividends of $0.310 per share on our common stock, which corresponded to aggregate dividend payments of $479.1. On February 8, 2024, we announced that our Board of Directors (the "Board") had declared a common stock cash dividend of $0.330 per share, payable on March 15, 2024 to holders of record as of the close of business on March 1, 2024. Assuming we pay a quarterly dividend of $0.330 per share and there is no significant change in the number of outstanding shares as of December 31, 2023, we would expect to pay approximately $500.0 over the next twelve months. Whether to declare and the amount of any such future dividend is at the discretion of our Board and will depend upon factors such as our earnings, financial position and cash requirements.

•U.K. Pension Plan - In December 2023, the Interpublic Limited Pension Plan in the U.K., (the "U.K .Pension Plan") the Company's U.K. defined benefit pension plan, entered into an agreement with an insurance company to purchase a group annuity, or "buy-in", that matches the plans future projected benefit obligations to covered participants. Prior to the transaction, the Company contributed an incremental $46.0 to the U.K. Pension Plan. As part of the annuity purchase contract, the U.K. Pension Plan has the option to complete a "buy-out", which would transfer all liabilities of the plan to the insurer, which the Company anticipates to be completed in the next 12-18 months. The non-cash settlement charge, net of tax, associated with the transaction is currently estimated to be approximately $180.0 to $200.0.

36

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

The following summarizes our estimated contractual cash obligations and commitments as of December 31, 2023 and their effect on our liquidity and cash flow in future periods.

	Years ended December 31,										Thereafter		Total
	2024		2025		2026		2027		2028
Long-term debt 1	$	250.1	$	0.2	$	0.2	$	0.1	$	497.0	$	2,420.0	$	3,167.6
Interest payments on long-term debt 1	133.3		128.0		127.7		126.1		126.1		899.8		1,541.0
Non-cancelable operating lease obligations 2	299.6		270.1		249.8		215.4		170.9		458.4		1,664.2
Contingent acquisition payments 3	12.6		17.5		20.0		28.7		0.0		0.0		78.8
Uncertain tax positions 4	85.7		53.9		72.3		47.6		6.1		25.4		291.0
Total	$	781.3	$	469.7	$	470.0	$	417.9	$	800.1	$	3,803.6	$	6,742.6

1Amounts represent maturity at book value and interest payments based on contractual obligations. We may at our option and at any time redeem all or some of any outstanding series of our senior notes reflected in this table at the redemption prices set forth in the applicable supplemental indentures under which such senior notes were issued. See Note 4 in Item 8, Financial Statements and Supplementary Data for further information.

2Non-cancellable operating lease obligations are presented net of future receipts on contractual sublease arrangements. See Note 3 in Item 8, Financial Statements and Supplementary Data for further information.

3We have structured certain acquisitions with additional contingent purchase price obligations based on factors including future performance of the acquired entity. See Note 6 and Note 16 in Item 8, Financial Statements and Supplementary Data for further information.

4The amounts presented are estimates due to inherent uncertainty of tax settlements, including the ability to offset liabilities with tax loss carryforwards.

Share Repurchase Programs

In February 2022, our Board of Directors (the "Board") reauthorized a program to repurchase from time to time up to $400.0 of our common stock. In February 2023, the Board authorized a share repurchase program to repurchase from time to time up to $350.0, excluding fees, of our common stock, which was in addition to any amounts remaining under the 2022 share repurchase program. We fully utilized the 2022 share repurchase program during the second quarter of 2023. As of December 31, 2023, $80.1, excluding fees, remains available for repurchase under the 2023 share repurchase program.

On February 7, 2024, the Board authorized a share repurchase program to repurchase from time to time up to $320.0, excluding fees, of our common stock, which was in addition to any amounts remaining under the 2023 share repurchase program. We may effect such repurchases through open market purchases, trading plans established in accordance with U.S. Securities and Exchange Commission ("SEC") rules, derivative transactions or other means. There are no expiration dates associated with the share repurchase programs.

FINANCING AND SOURCES OF FUNDS

Substantially all of our operating cash flow is generated by our agencies. Our cash balances are held in numerous jurisdictions throughout the world, including at the holding company level. Below is a summary of our sources of liquidity.

At December 31, 2023, we held $531.2 of cash, cash equivalents and marketable securities in foreign subsidiaries. The Company has historically asserted that its unremitted foreign earnings are permanently reinvested, and therefore has not recorded any deferred taxes on such amounts. However, as of December 31, 2023, $121.0 of undistributed foreign earnings from certain international entities were not subject to the permanent reinvestment assertion, therefore, the Company has recorded deferred taxes on this amount.

Credit Arrangements

We maintain a committed corporate credit facility, originally dated as of July 18, 2008, which has been amended and restated from time to time (the "Credit Agreement"). We use our Credit Agreement to increase our financial flexibility, to provide letters of credit primarily to support obligations of our subsidiaries and to support our commercial paper program. On November 1, 2021, we amended and restated the Credit Agreement. As amended, among other things, the maturity date of the Credit Agreement was extended to November 1, 2026 and the cost structure of the Credit Agreement was changed. The Credit Agreement continues to include a required leverage ratio of not more than 3.50 to 1.00, among other customary covenants, including limitations on our liens and the liens of our consolidated subsidiaries and limitations on the incurrence of subsidiary debt. At the election of the Company, the leverage ratio may be changed to not more than 4.00 to 1.00 for four consecutive quarters, beginning with the fiscal quarter in which there is an occurrence of one or more acquisitions with an aggregate purchase price of at least $200.0.

The Credit Agreement is a revolving facility under which amounts borrowed by us or any of our subsidiaries designated under the Credit Agreement may be repaid and reborrowed, subject to an aggregate lending limit of $1,500.0, or the equivalent

37

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

in other currencies. The Company has the ability to increase the commitments under the Credit Agreement from time to time by an additional amount of up to $250.0, provided the Company receives commitments for such increases and satisfies certain other conditions. The aggregate available amount of letters of credit outstanding may decrease or increase, subject to a sublimit of $50.0, or the equivalent in other currencies. Our obligations under the Credit Agreement are unsecured. As of December 31, 2023, there were no borrowings under the Credit Agreement; however, we had $9.5 of letters of credit under the Credit Agreement, which reduced our total availability to $1,490.5.

We were in compliance with all of our covenants in the Credit Agreement as of December 31, 2023. The financial covenant in the Credit Agreement requires that we maintain, as of the end of each fiscal quarter, a certain leverage ratio for the four quarters then ended. Management utilizes Credit Agreement EBITDA, which is a non-GAAP financial measure, as well as the amounts shown in the table below, calculated as required by the Credit Agreement, in order to assess our compliance with such covenants.

The table below sets forth the financial covenant in effect as of December 31, 2023.

	Four Quarters Ended		Four Quarters Ended
Financial Covenant	December 31, 2023	Credit Agreement EBITDA Reconciliation 1	December 31, 2023
Leverage ratio (not greater than) 1	3.50x	Net income available to IPG common stockholders	$	1,098.4
Actual leverage ratio	1.79x	Non-operating adjustments 2	384.2
		Operating income	1,482.6
		Add:
		Depreciation and amortization	311.8
		Other non-cash charges reducing operating income	(1.2)
		Credit Agreement EBITDA 1	$	1,793.2

1The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA (as defined in the Credit Agreement) for the four quarters then ended.

2Includes adjustments of the following items from our Consolidated Statement of Operations in Item 8, Financial Statements and Supplementary Data: provision for income taxes, total (expenses) and other income, equity in net income of unconsolidated affiliates, and net income attributable to noncontrolling interests.

Uncommitted Lines of Credit

We also have uncommitted lines of credit with various banks that permit borrowings at variable interest rates and that are primarily used to fund working capital needs. We have guaranteed the repayment of some of these borrowings made by certain subsidiaries. If we lose access to these credit lines, we would have to provide funding directly to some of our operations. As of December 31, 2023, the Company had uncommitted lines of credit in an aggregate amount of $780.7, under which we had outstanding borrowings of $34.2 classified as short-term borrowings on our Consolidated Balance Sheet. The average amount outstanding during 2023 was $47.9, with a weighted-average interest rate of approximately 7.9%.

Commercial Paper

The Company is authorized to issue unsecured commercial paper up to a maximum aggregate amount outstanding at any time of $1,500.0. Borrowings under the commercial paper program are supported by the Credit Agreement described above. Proceeds of the commercial paper are used for working capital and general corporate purposes, including the repayment of maturing indebtedness and other short-term liquidity needs. The maturities of the commercial paper vary but may not exceed 397 days from the date of issue. There was no commercial paper activity during 2023 and as of December 31, 2023, there was no commercial paper outstanding.

Cash Pooling

We aggregate our domestic cash position on a daily basis. Outside the United States, we use cash pooling arrangements with banks to help manage our liquidity requirements. In these pooling arrangements, several IPG agencies agree with a single bank that the cash balances of any of the agencies with the bank will be subject to a full right of set-off against amounts other agencies owe the bank, and the bank provides for overdrafts as long as the net balance for all agencies does not exceed an agreed-upon level. Typically, each agency pays interest on outstanding overdrafts and receives interest on cash balances. Our Consolidated Balance Sheets reflect cash, net of bank overdrafts, under all of our pooling arrangements, and as of December 31, 2023 and 2022 the amounts netted were $2,718.0 and $2,411.2, respectively.

38

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

DEBT CREDIT RATINGS

Our debt credit ratings as of February 15, 2024 are listed below.

	Moody’s Investors Service	S&P Global Ratings	Fitch Ratings
Short-term rating	P-2	A-2	F2
Long-term rating	Baa2	BBB	BBB+
Outlook	Stable	Stable	Stable

A credit rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time by the assigning credit rating agency. The rating of each credit rating agency should be evaluated independently of any other rating. Credit ratings could have an impact on liquidity, either adverse or favorable, because, among other things, they could affect funding costs in the capital markets or otherwise. For example, our Credit Agreement fees and borrowing rates are based on a credit ratings grid, and our access to the commercial paper market is contingent on our maintenance of sufficient short-term debt ratings.

CRITICAL ACCOUNTING ESTIMATES

Our Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Preparation of the Consolidated Financial Statements and related disclosures requires us to make judgments, assumptions and estimates that affect the amounts reported and disclosed in the accompanying financial statements and footnotes. Our significant accounting policies are discussed in Note 1 to the Consolidated Financial Statements. We believe that of our significant accounting policies, the following critical accounting estimates involve management’s most difficult, subjective or complex judgments. We consider these accounting estimates to be critical because changes in the underlying assumptions or estimates have the potential to materially impact our Consolidated Financial Statements. Management has discussed with our Audit Committee the development, selection, application and disclosure of these critical accounting estimates. We regularly evaluate our judgments, assumptions and estimates based on historical experience and various other factors that we believe to be relevant under the circumstances. Actual results may differ from these estimates under different assumptions or conditions. A further decline in macroeconomic conditions or increasing interest rates could have a negative impact on these estimates, including the fair value of certain assets.

Revenue Recognition

Our revenues are primarily derived from the planning and execution of multi-channel advertising and communications, marketing services, including public relations, meeting and event production, sports and entertainment marketing, corporate and brand identity, strategic marketing consulting, and providing marketing data and technology services around the world.

Most of our client contracts are individually negotiated and, accordingly, the terms of client engagements and the basis on which we earn fees and commissions vary significantly. Our contracts generally provide for termination by either party on relatively short notice, usually 30 to 90 days, although our data management contracts typically have non-cancelable terms of more than one year. Our payment terms vary by client, and the time between invoicing date and due date is typically not significant. We generally have the legally enforceable right to payment for all services provided through the end of the contract or termination date.

We recognize revenue when we determine our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue recognition, we perform the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue as or when we satisfy the performance obligation. We only apply the five-step model to contracts when it is probable that IPG will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, we assess the goods or services promised within each contract and determine those that are distinct performance obligations. We then assess whether we act as an agent or a principal for each identified performance obligation and include revenue within the transaction price for third-party costs when we determine that we act as principal.

Revenue before billable expenses, primarily consisting of fees, commissions and performance incentives, represents the amount of our gross billings excluding billable expenses charged to a client. Generally, our compensation is based on a negotiated fixed price, rate per hour, a retainer, commission or volume. The majority of our fees are recognized over time as services are performed, either utilizing a function of hours incurred and rates per hour, as compared to periodically updated estimates to complete, or ratably over the term of the contract. For certain less-frequent commission-based contracts which

39

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

contain clauses allowing our clients to terminate the arrangement at any time for no compensation, revenue is recognized at a point in time, typically the date of broadcast or publication.

Contractual arrangements with clients may also include performance incentive provisions designed to link a portion of our revenue to our performance relative to mutually agreed-upon qualitative and/or quantitative metrics. Performance incentives are treated as variable consideration which is estimated at contract inception and included in revenue based on the most likely amount earned out of a range of potential outcomes. Our estimates are based on a combination of historical award experience, anticipated performance and our best judgment. These estimates are updated on a periodic basis and are not expected to result in a reversal of a significant amount of the cumulative revenue recognized.

The predominant component of billable expenses are third-party vendor costs incurred for performance obligations where we have determined that we are acting as principal. These third-party expenses are generally billed back to our clients. Billable expenses also includes incidental costs incurred in the performance of our services including airfare, mileage, hotel stays, out-of-town meals and telecommunication charges. We record these billable expenses within total revenue with a corresponding offset to operating expenses.

In international markets, we may receive rebates or credits from vendors based on transactions entered into on behalf of clients. Rebates and credits are remitted back to our clients in accordance with our contractual requirements or may be retained by us based on the terms of a particular client contract and local law. Amounts owed back to clients are recorded as a liability and amounts retained by us are recorded as revenue when earned.

In certain international markets, our media contracts may allow clients to terminate our arrangement at any time for no compensation to the extent that media has not yet run. For those contracts, we do not recognize revenue until the media runs which is the point in time at which we have a legally enforceable right to compensation.

In the normal course of business, certain agencies may enter into agreements with media suppliers to purchase an agreed value of media within a fixed timeframe. By entering into these agreements, the agency is taking a risk and may be required to pay a portion or all of the agreed value ahead of media being run. In order to participate in these arrangements and receive an agreed additional benefit from the agency, clients are required to contractually opt in.

Performance Obligations

Our client contracts may include various goods and services that are capable of being distinct, are distinct within the context of the contract and are therefore accounted for as separate performance obligations. We allocate revenue to each performance obligation in the contract at inception based on its relative standalone selling price.

Our advertising businesses include a wide range of services that involve the creation of an advertising idea, concept, campaign, or marketing strategy in order to promote the client’s brand ("creative services"), and to act as an agent to facilitate the production of advertisements by third-party suppliers ("production services”). Our clients can contract us to perform one or both of these services, as they can derive stand-alone benefits from each. Production services can include formatting creative material for different media and communication mediums including digital, large-scale reproduction such as printing and adaptation services, talent engagement and acquisition, television and radio production, and outdoor billboard production. Our contracts that include both services are typically explicit in the description of which activities constitute the creative advertising services and those that constitute the production services. Both the creative and production services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our advertising contracts.

Our media businesses include services to formulate strategic media plans ("media planning services") and to act as an agent to purchase media (e.g., television and radio spots, outdoor advertising, digital banners, etc.) from vendors on our clients' behalf ("media buying services"). Our contracts that include both services are typically explicit in the description of which activities constitute the planning services and those that constitute the buying services. Both the planning and buying services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our media contracts.

Our events businesses include creative services related to the conception and planning of custom marketing events as well as activation services which entail the carrying out of the event, including, but not limited to, set-up, design and staffing. Additionally, our public relations businesses include a broad range of services, such as strategic planning, social media strategy and the monitoring and development of communication strategies, among others. While our contracts in these businesses may include some or all of these services, we typically identify only one performance obligation in the assessment of our events and public relations contracts as we provide a significant service of integrating the individual services into a combined service for which the customer has contracted.

40

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

Our data and technology services businesses include data management, data and data strategy, identity resolution, and measurement and analytics products and services. While our contracts in these businesses may include some or all of these services, we typically identify each product and service as an individual performance obligation.

Principal vs. Agent

When a third-party is involved in the delivery of our services to the client, we assess whether or not we are acting as a principal or an agent in the arrangement. The assessment is based on whether we control the specified services at any time before they are transferred to the customer. We have determined that in our events and public relations businesses, we generally act as a principal as our agencies provide a significant service of integrating goods or services provided by third parties into the specified deliverable to our clients. In addition, we have determined that we are responsible for the performance of the third-party suppliers, which are combined with our own services, before transferring those services to the customer. We have also determined that we act as principal when providing creative services and media planning services, as we perform a significant integration service in these transactions. For performance obligations in which we act as principal, we record the gross amount billed to the customer within total revenue and the related incremental direct costs incurred as billable expenses.

In the vast majority of our business, when a third-party is involved in the production of an advertising campaign and for media buying services, we have determined that we act as the agent and are solely arranging for the third-party suppliers to provide services to the customer. Specifically, we do not control the specified services before transferring those services to the customer, we are not primarily responsible for the performance of the third-party services, nor can we redirect those services to fulfill any other contracts. We do not have inventory risk or discretion in establishing pricing in our contracts with customers. For performance obligations for which we act as the agent, we record our revenue as the net amount of our gross billings less amounts remitted to third parties.

Income Taxes

The provision for income taxes includes U.S. federal, state, local and foreign taxes. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. Changes to enacted tax rates would result in either increases or decreases in the provision for income taxes in the period of change.

We are required to evaluate the realizability of our deferred tax assets, which is primarily dependent on future earnings. A valuation allowance shall be recognized when, based on available evidence, it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. The factors used in assessing valuation allowances include all available evidence, such as past operating results, estimates of future taxable income and the feasibility of tax planning strategies. In circumstances where there is negative evidence, establishment of a valuation allowance must be considered. We believe that cumulative losses in the most recent three-year period represent significant negative evidence when evaluating a decision to establish a valuation allowance. Conversely, a pattern of sustained profitability represents significant positive evidence when evaluating a decision to reverse a valuation allowance. Further, in those cases where a pattern of sustained profitability exists, projected future taxable income may also represent positive evidence, to the extent that such projections are determined to be reliable given the current economic environment. Accordingly, the increase and decrease of valuation allowances has had and could have a significant negative or positive impact on our current and future earnings.

The authoritative guidance for uncertainty in income taxes prescribes a recognition threshold and measurement criteria for the financial statement reporting of a tax position that an entity takes or expects to take in a tax return. Additionally, guidance is provided for de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The assessment of recognition and measurement requires critical estimates and the use of complex judgments. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Goodwill and Other Intangible Assets

We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of

41

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

The Company transferred certain agencies between operating segments as of January 1, 2023 which resulted in certain changes to our reporting units and reportable segments. In addition, we completed an assessment of any potential goodwill impairment for all reporting units immediately prior and subsequent to the reallocation and determined that no impairment existed.

We review goodwill and other intangible assets with indefinite lives not subject to amortization as of October 1st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 10 reporting units that were subject to the 2023 annual impairment testing. Our annual impairment review as of October 1, 2023 did not result in an impairment charge at any of our reporting units.

In performing our annual impairment review, we first assess qualitative factors to determine whether it is “more likely than not” that the goodwill or indefinite-lived intangible assets are impaired. Qualitative factors to consider may include macroeconomic conditions, industry and market considerations, cost factors that may have a negative effect on earnings, financial performance, and other relevant entity-specific events such as changes in management, key personnel, strategy or clients, as well as pending litigation. If, after assessing the totality of events or circumstances such as those described above, an entity determines that it is "more likely than not" that the goodwill or indefinite-lived intangible asset is impaired, then the entity is required to determine the fair value and perform the quantitative impairment test by comparing the fair value with the carrying value. Otherwise, no additional testing is required.

For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, a quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The sum of the fair values of all our reporting units is reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the quantitative impairment test is failed, and impaired goodwill is written down to its fair value with a charge to expense in the period the impairment is identified.

For the 2023 and 2022 annual impairment tests, we performed a qualitative impairment assessment for seven and eight reporting units, respectively, and performed the quantitative impairment test for three and two reporting units, respectively. For the qualitative analysis we took into consideration all the relevant events and circumstances, including financial performance, macroeconomic conditions and entity-specific factors such as client wins and losses. Based on this assessment, we have concluded that for each of our reporting units subject to the qualitative assessment, it is not “more likely than not” that its fair value was less than its carrying value; therefore, no additional testing was required.

The 2023 and 2022 fair values of reporting units for which we performed quantitative impairment tests were estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data. We generally applied an equal weighting to the income and market approaches for our analysis. For the income approach, we used projections, which require the use of significant estimates and assumptions specific to the reporting unit as well as those based on general economic conditions. Factors specific to each reporting unit include revenue growth, profit margins, terminal value growth rates, capital expenditures projections, assumed tax rates, discount rates and other assumptions deemed reasonable by management. For the market approach, we used judgment in identifying the relevant comparable-company market multiples.

These estimates and assumptions may vary between each reporting unit depending on the facts and circumstances specific to that reporting unit. The discount rate for each reporting unit is influenced by general market conditions as well as factors specific to the reporting unit. For the 2023 test, the discount rate we used for our reporting units tested ranged between 13.0% and 15.5%, and the terminal value growth rate ranged between 2.0% and 3.0%. The terminal value growth rate represents the expected long-term growth rate for our industry, which incorporates the type of services each reporting unit provides as well as the global economy. For the 2023 test, the revenue growth rates for our reporting units used in our analysis were generally between 1.5% and 9.0%. Factors influencing the revenue growth rates include the nature of the services the reporting unit provides for its clients, the geographic locations in which the reporting unit conducts business and the maturity of the reporting unit. We believe that the estimates and assumptions we made are reasonable, but they are susceptible to change from period to period. Actual results of operations, cash flows and other factors will likely differ from the estimates used in our valuation, and it is possible that differences and changes could be material. A deterioration in profitability, adverse market conditions, significant client losses, changes in spending levels of our existing clients or a different economic outlook than currently

42

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

estimated by management could have a significant impact on the estimated fair value of our reporting units and could result in an impairment charge in the future.

We also perform a sensitivity analysis to detail the impact that changes in assumptions may have on the outcome of the first step of the impairment test. Our sensitivity analysis provides a range of fair value for each reporting unit, where the low end of the range increases discount rates by 0.5%, and the high end of the range decreases discount rates by 0.5%. We use the average of our fair values for purposes of our comparison between carrying value and fair value for the quantitative impairment test.

The table below displays the midpoint of the fair value range for each reporting unit tested in the 2023 and 2022 annual impairment tests, indicating that the fair value exceeded the carrying value for all reporting units by greater than 20%.

	2023 Impairment Test				2022 Impairment Test
Reporting Unit	Goodwill		Fair value exceeds carrying value by:	Reporting Unit	Goodwill		Fair value exceeds carrying value by:
A	$	483.7	> 70%	A	$	448.6	> 200%
B	$	735.5	> 25%	B	$	528.3	> 100%
C	$	99.7	> 45%

Based on the analysis described above, for the reporting units for which we performed the quantitative impairment test, we concluded that our goodwill was not impaired as of October 1, 2023, because these reporting units passed the test as the fair values of each of the reporting units were substantially in excess of their respective carrying values.

We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these asset groups. These asset groups are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

Intangible assets with indefinite useful lives are not amortized but are evaluated for impairment annually or more frequently if events or changes in circumstances indicate that impairment may exist. The Company first assesses qualitative factors to determine whether it is necessary to perform a quantitative impairment test for indefinite-lived intangible assets. Impairment exists if the fair value of the indefinite-lived intangible asset is less than the carrying value. The determination of fair value is based on the relief from royalty method of the income approach, which models the cash flows from indefinite-lived intangibles assuming royalties were received under a licensing arrangement. This discounted cash flow analysis includes assumptions related to forecasted future revenues attributable to indefinite-lived intangibles, royalty rates and risk-adjusted discount rates. If the carrying value of an indefinite-lived intangible asset exceeds its estimated fair value, the indefinite-lived intangible asset is considered impaired, and an impairment loss will be recognized in an amount equal to the excess of the carrying value over the fair value. Based on this analysis, for the indefinite lived-intangible asset for which we performed a quantitative impairment test as of October 1, 2023, we concluded that it was not impaired because its fair value was in excess of its carrying value.

Pension and Postretirement Benefit Plans

We use various actuarial assumptions in determining our net pension and postretirement benefit costs and obligations. Management is required to make significant judgments about a number of actuarial assumptions, including discount rates and expected returns on plan assets, which are updated annually or more frequently with the occurrence of significant events.

The discount rate is a significant assumption that impacts our net pension and postretirement benefit costs and obligations. We determine our discount rates for our domestic pension and postretirement benefit plans and significant foreign pension plans based on either a bond selection/settlement approach or bond yield curve approach. Using the bond selection/settlement approach, we determine the discount rate by selecting a portfolio of corporate bonds appropriate to provide for the projected benefit payments. Using the bond yield curve approach, we determine the discount rate by matching the plans' cash flows to spot rates developed from a yield curve. Both approaches utilize high-quality AA-rated corporate bonds and the plans' projected cash flows to develop a discounted value of the benefit payments, which is then used to develop a single discount rate. In countries where markets for high-quality long-term AA corporate bonds are not well developed, a portfolio of long-term

43

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

government bonds is used as a basis to develop hypothetical corporate bond yields, which serve as a basis to derive the discount rate.

The discount rate used to calculate net pension and postretirement benefit costs is determined at the beginning of each year. For the year ended December 31, 2023, discount rates of 5.65% for both the domestic pension plan and the domestic postretirement benefit plan, and a weighted-average discount rate of 4.62% for the significant foreign pension plans were used to calculate 2023 net pension and postretirement benefit costs. A 25 basis-point increase or decrease in the discount rate would not have impacted the 2023 net pension and postretirement benefit cost.

The discount rate used to measure our benefit obligations is determined at the end of each year. As of December 31, 2023, we used discount rates of 5.40% for both the domestic pension plan and the domestic postretirement benefit plan and a weighted-average discount rate of 4.32% for our significant foreign pension plans to measure our benefit obligations. A 25 basis-point increase or decrease in the discount rate would have decreased or increased the benefit obligation as of December 31, 2023 by approximately $12.0, respectively.

The expected rate of return on pension plan assets is another significant assumption that impacts our net pension cost and is determined at the beginning of the year. Our expected rate of return considers asset class index returns over various market and economic conditions, current and expected market conditions, risk premiums associated with asset classes and long-term inflation rates. We determine both a short-term and long-term view and then select a long-term rate of return assumption that matches the duration of our liabilities.

For 2023, the weighted-average expected rates of return of 6.00% and 5.62% were used in the calculation of net pension costs for the domestic and significant foreign pension plans, respectively. For 2024, we plan to use expected rates of return of 4.25% and 4.20% for the domestic and significant foreign pension plans, respectively. Changes in the rates are typically due to lower or higher expected future returns based on the mix of assets held. A lower expected rate of return would increase our net pension cost. A 25 basis-point increase or decrease in the expected return on plan assets would have decreased or increased the 2023 net pension cost by approximately $1.0.

RECENT ACCOUNTING STANDARDS

See Note 17 in Item 8, Financial Statements and Supplementary Data for further information on certain accounting standards that have been adopted during 2023 or that have not yet been required to be implemented and may be applicable to our future operations.

NON-GAAP FINANCIAL MEASURE

This MD&A includes both financial measures in accordance with U.S. GAAP, as well as a non-GAAP financial measure. The non-GAAP financial measure represents Net Income Available to IPG Common Stockholder before Provision for Income Taxes, Total (Expenses) and Other Income, Equity in Net Income of Unconsolidated Affiliates, Net Income Attributable to Non-controlling Interests and Amortization of Acquired Intangibles which we refer to as “Adjusted EBITA”.

Adjusted EBITA should be viewed as supplemental to, and not as an alternative for Net Income Available to IPG Common Stockholders calculated in accordance with U.S. GAAP ("net income") or operating income calculated in accordance with U.S. GAAP ("operating income"). This section also includes reconciliation of this non-GAAP financial measure to the most directly comparable U.S. GAAP financial measures, as presented below.

Adjusted EBITA is used by our management as an additional measure of our Company’s performance for purposes of business decision-making, including developing budgets, managing expenditures, and evaluating potential acquisitions or divestitures. Period-to-period comparisons of Adjusted EBITA help our management identify additional trends in our Company’s financial results that may not be shown solely by period-to-period comparisons of net income or operating income. In addition, we may use Adjusted EBITA in the incentive compensation programs applicable to some of our employees in order to evaluate our Company’s performance. Our management recognizes that Adjusted EBITA has inherent limitations because of the excluded items, particularly those items that are recurring in nature. Management also reviews operating income and net income as well as the specific items that are excluded from Adjusted EBITA, but included in net income or operating income, as well as trends in those items. The amounts of those items are set forth, for the applicable periods, in the reconciliation of Adjusted EBITA to net income that accompany our disclosure documents containing non-GAAP financial measures, including the reconciliations contained in this MD&A.

We believe that the presentation of Adjusted EBITA is useful to investors in their analysis of our results for reasons similar to the reasons why our management finds it useful and because it helps facilitate investor understanding of decisions made by management in light of the performance metrics used in making those decisions. In addition, as more fully described below, we believe that providing Adjusted EBITA, together with a reconciliation of this non-GAAP financial measure to net income, helps

44

Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Amounts in Millions, Except Per Share Amounts)

investors make comparisons between our Company and other companies that may have different capital structures, different effective income tax rates and tax attributes, different capitalized asset values and/or different forms of employee compensation. However, Adjusted EBITA is intended to provide a supplemental way of comparing our Company with other public companies and is not intended as a substitute for comparisons based on net income or operating income. In making any comparisons to other companies, investors need to be aware that companies may use different non-GAAP measures to evaluate their financial performance. Investors should pay close attention to the specific definition being used and to the reconciliation between such measures and the corresponding U.S. GAAP measures provided by each company under the applicable rules of the U.S. Securities and Exchange Commission.

The following is an explanation of the items excluded by us from Adjusted EBITA but included in net income:

•Total (Expenses) and Other Income, Provision for Income Taxes, Equity in Net Income of Unconsolidated Affiliates and Net Income Attributable to Non-controlling Interests. We exclude these items (i) because these items are not directly attributable to the performance of our business operations and, accordingly, their exclusion assists management and investors in making period-to-period comparisons of operating performance and (ii) to assist management and investors in making comparisons to companies with different capital structures. Investors should note that these items will recur in future periods.

•Amortization of Acquired Intangibles. Amortization of acquired intangibles is a non-cash expense relating to intangible assets arising from acquisitions that are expensed on a straight-line basis over the estimated useful life of the related assets. We exclude amortization of acquired intangibles because we believe that (i) the amount of such expenses in any specific period may not directly correlate to the underlying performance of our business operations and (ii) such expenses can vary significantly between periods as a result of new acquisitions and full amortization of previously acquired intangible assets. Accordingly, we believe that this exclusion assists management and investors in making period-to-period comparisons of operating performance. Investors should note that the use of acquired intangible assets contributed to revenue in the periods presented and will contribute to future revenue generation and should also note that such expense may recur in future periods.

The following table presents the reconciliation of Net Income Available to IPG Common Stockholders to Adjusted EBITA for the years ended December 31, 2023, 2022 and 2021.

	Years ended December 31,
	2023			2022			2021
Revenue before billable expenses	$	9,400.6		$	9,449.4		$	9,107.9
Adjusted EBITA Reconciliation:
Net Income Available to IPG Common Stockholders 1	$	1,098.4		$	938.0		$	952.8
Add Back:
Provision for income taxes	291.2			318.4			251.8
Subtract:
Total (expenses) and other income	(74.6)			(112.3)			(214.1)
Equity in net income of unconsolidated affiliates	1.3			5.6			2.5
Net income attributable to non-controlling interests	(19.7)			(18.1)			(20.0)
Operating Income 1	1,482.6			1,381.2			1,436.2
Add Back:
Amortization of acquired intangibles	84.0			84.7			86.2
Adjusted EBITA 1	$	1,566.6		$	1,465.9		$	1,522.4
Adjusted EBITA Margin on Revenue before billable expenses 1	16.7		%	15.5		%	16.7		%

1Calculations include restructuring charges of $0.1 in 2023, $102.4 in 2022 and $10.6 in 2021. See “Restructuring Charges” in this MD&A and Note 11 in Item 8, Financial Statements and Supplementary Data, for further information.

45

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

(Amounts in millions)

In the normal course of business, we are exposed to market risks related to interest rates, foreign currency rates and certain balance sheet items. From time to time, we use derivative instruments, pursuant to established guidelines and policies, to manage some portion of these risks. Derivative instruments utilized in our hedging activities are viewed as risk management tools and are not used for trading or speculative purposes.

Interest Rates

Our exposure to market risk for changes in interest rates relates primarily to the fair market value and cash flows of our debt obligations. The majority of our debt (approximately 99% and 98% as of December 31, 2023 and 2022, respectively) bears interest at fixed rates. We do have debt with variable interest rates, but a 10% increase or decrease in interest rates would not be material to our interest expense or cash flows. The fair market value of our debt is sensitive to changes in interest rates, and the impact of a 10% change in interest rates is summarized below.

	Increase/(Decrease) in Fair Market Value
As of December 31,	10% Increase in Interest Rates		10% Decrease in Interest Rates
2023	$	(115.3)	$	111.0
2022	(99.2)		127.1

We had $2,388.3 of cash, cash equivalents and marketable securities as of December 31, 2023 that we generally invest in conservative, short-term bank deposits or securities. The interest income generated primarily from these investments is subject to both domestic and foreign interest rate movements. During 2023 and 2022, we had interest income of $140.8 and $56.6, respectively. Based on our 2023 results, a 100 basis-point increase or decrease in interest rates would affect our interest income by approximately $23.9, assuming that all cash, cash equivalents and marketable securities are impacted in the same manner and balances remain constant from year-end 2023 levels.

Foreign Currency Rates

We are subject to translation and transaction risks related to changes in foreign currency exchange rates. Since we report revenues and expenses in U.S. Dollars, changes in exchange rates may either positively or negatively affect our consolidated revenues and expenses (as expressed in U.S. Dollars) from foreign operations. The foreign currencies that most adversely impacted our results during the year ended December 31, 2023 were the Argentine Peso, the Israeli Shekel, the Canadian Dollar, the Indian Rupee and the Japanese Yen. The foreign currencies that most favorably impacted our results during the year ended December 31, 2023 were the Euro and the Mexican Peso. Based on 2023 exchange rates and operating results, if the U.S. Dollar were to strengthen or weaken by 10%, we currently estimate operating income would decrease or increase approximately 3%, assuming that all currencies are impacted in the same manner and our international revenue and expenses remain constant at 2023 levels.

The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss, net of tax, in the stockholders’ equity section of our Consolidated Balance Sheets. Our foreign subsidiaries generally collect revenues and pay expenses in their functional currency, mitigating transaction risk. However, certain subsidiaries may enter into transactions in currencies other than their functional currency. Assets and liabilities denominated in currencies other than the functional currency are susceptible to movements in foreign currency until final settlement. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and other direct expenses. We regularly review our foreign exchange exposures that may have a material impact on our business and from time to time use derivative financial instruments, designated as fair value hedges or net investment hedges, to hedge the effects of potential adverse fluctuations in foreign currency exchange rates arising from these exposures. We do not enter into foreign exchange contracts or other derivatives for speculative purposes.

We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country is changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses are recognized on all monetary transactions, assets and liabilities denominated in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

46

Credit and Market Risks

Balance sheet items that potentially subject us to concentrations of credit risk are primarily cash and cash equivalents, short-term marketable securities, accounts receivable and accounts receivable billable to clients. We invest our cash primarily in investment-grade, short-term securities and bank deposits and limit the amount of credit exposure to any one counterparty. Concentrations of credit risk with respect to accounts receivable are mitigated by our large number of clients and their dispersion across different industries and geographic areas. We perform ongoing credit evaluations on a large number of our clients and maintain an allowance for expected credit losses based upon the expected collectability of all accounts receivable.

Our pension plan assets are also exposed to market risk. The fair value of our pension plan assets may appreciate or depreciate during the year, which can result in lower or higher pension expense and funding requirements in future periods.

47

Item 8. Financial Statements and Supplementary Data

INDEX

	Page
Report of Independent Registered Public Accounting Firm (PCAOB ID 238)	49
Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021	51
Consolidated Statements of Comprehensive Income for the years ended December 31, 2023, 2022 and 2021	52
Consolidated Balance Sheets as of December 31, 2023 and 2022	53
Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021	54
Consolidated Statements of Stockholders' Equity for the years ended December 31, 2023, 2022 and 2021	55
Notes to Consolidated Financial Statements	57
1.   Summary of Significant Accounting Policies	57
2.   Revenue	63
3.   Leases	65
4.   Debt and Credit Arrangements	67
5.   Earnings Per Share	70
6.   Acquisitions	70
7.   Supplementary Data	72
8.   Goodwill and Other Intangible Assets	74
9.   Income Taxes	75
10. Accumulated Other Comprehensive Loss, Net of Tax	79
11. Restructuring Charges	80
12. Incentive Compensation Plans	82
13. Fair Value Measurements	85
14. Employee Benefits	87
15. Segment Information	93
16. Commitments and Contingencies	95
17. Recent Accounting Standards	96
18. Subsequent Events	97

48

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of The Interpublic Group of Companies, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of The Interpublic Group of Companies, Inc. and its subsidiaries (the “Company”) as of December 31, 2023 and 2022, and the related consolidated statements of operations, of comprehensive income, of stockholders’ equity and of cash flows for each of the three years in the period ended December 31, 2023, including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

49

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Impairment Assessment for Indefinite-Lived Intangible Assets

As described in Notes 1 and 8 to the consolidated financial statements, the Company’s other intangible assets balance includes $165.7 million of indefinite-live intangible assets as of December 31, 2023. For intangible assets not subject to amortization, management evaluates for impairment annually or more frequently if events or changes in circumstances indicate that an impairment may exist. The determination of fair value is based on the relief from royalty method of the income approach, which incorporates the use of a discounted cash flow analysis. Management’s discounted cash flow analysis includes assumptions related to forecasted future revenues, royalty rates and discount rates.

The principal considerations for our determination that performing procedures relating to the impairment assessment for indefinite-lived intangible assets is a critical audit matter are (i) the significant judgment by management when developing the fair value estimate of the indefinite-lived intangible assets; (ii) a high degree of auditor judgment, subjectivity, and effort in performing procedures and evaluating management’s significant assumption related to the discount rate; and (iii) the audit effort involved the use of professionals with specialized skill and knowledge.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to management’s impairment assessment, including controls over the valuation of the Company’s indefinite-lived intangible assets. These procedures also included, among others (i) testing management’s process for developing the fair value estimate for the indefinite-lived intangible assets; (ii) evaluating the appropriateness of the relief from royalty method; (iii) testing the completeness and accuracy of underlying data used in the relief from royalty method and (iv) evaluating the reasonableness of the significant assumption used by management related to the discount rate. Evaluating management’s assumption related to the discount rate involved evaluating whether the assumption used by management was reasonable considering whether the assumption was consistent with evidence obtained in other areas of the audit. Professionals with specialized skill and knowledge were used to assist in evaluating (i) the appropriateness of the Company’s relief from royalty method and (ii) the reasonableness of the discount rate assumption.

/s/ PricewaterhouseCoopers LLP

New York, New York

February 20, 2024

We have served as the Company's auditor since 1952.

50

THE INTERPUBLIC GROUP OF COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(Amounts in Millions, Except Per Share Amounts)

	Years ended December 31,
	2023		2022		2021
REVENUE:
Revenue before billable expenses	$	9,400.6	$	9,449.4	$	9,107.9
Billable expenses	1,488.7		1,478.4		1,132.8
Total revenue	10,889.3		10,927.8		10,240.7
OPERATING EXPENSES:
Salaries and related expenses	6,243.9		6,258.3		5,975.4
Office and other direct expenses	1,342.5		1,346.4		1,279.6
Billable expenses	1,488.7		1,478.4		1,132.8
Cost of services	9,075.1		9,083.1		8,387.8
Selling, general and administrative expenses	67.2		87.1		122.3
Depreciation and amortization	264.3		274.0		283.8
Restructuring charges	0.1		102.4		10.6
Total operating expenses	9,406.7		9,546.6		8,804.5
OPERATING INCOME	1,482.6		1,381.2		1,436.2
EXPENSES AND OTHER INCOME:
Interest expense	(225.6)		(167.9)		(170.6)
Interest income	140.8		56.6		27.2
Other income (expense), net	10.2		(1.0)		(70.7)
Total (expenses) and other income	(74.6)		(112.3)		(214.1)
Income before income taxes	1,408.0		1,268.9		1,222.1
Provision for income taxes	291.2		318.4		251.8
Income of consolidated companies	1,116.8		950.5		970.3
Equity in net income of unconsolidated affiliates	1.3		5.6		2.5
NET INCOME	1,118.1		956.1		972.8
Net income attributable to non-controlling interests	(19.7)		(18.1)		(20.0)
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$	1,098.4	$	938.0	$	952.8
Earnings per share available to IPG common stockholders:
Basic	$	2.86	$	2.40	$	2.42
Diluted	$	2.85	$	2.37	$	2.39
Weighted-average number of common shares outstanding:
Basic	384.1		391.5		393.0
Diluted	385.9		395.1		398.4

The accompanying notes are an integral part of these financial statements.

51

THE INTERPUBLIC GROUP OF COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Amounts in Millions)

	Years ended December 31,
	2023		2022		2021
NET INCOME	$	1,118.1	$	956.1	$	972.8
OTHER COMPREHENSIVE INCOME (LOSS)
Foreign currency translation:
Foreign currency translation adjustments	59.3		(131.8)		(86.1)
Reclassification adjustments recognized in net income	0.5		4.3		(1.0)
	59.8		(127.5)		(87.1)
Derivative instruments:
Changes in fair value of derivative instruments	0.6		17.5		14.0
Recognition of previously unrealized (gains) losses included in net income	(2.6)		(1.4)		4.2
Income tax effect	0.5		(4.0)		(2.1)
	(1.5)		12.1		16.1
Defined benefit pension and other postretirement plans:
Net actuarial (losses) gains for the period	(17.4)		2.4		58.0
Amortization of unrecognized losses, transition obligation and prior service cost included in net income	6.8		6.3		9.4
Settlement and curtailment (gains) losses included in net income	(0.3)		0.0		0.6
Other	(2.1)		4.8		1.3
Income tax effect	2.0		0.8		(13.8)
	(11.0)		14.3		55.5
Other comprehensive income (loss), net of tax	47.3		(101.1)		(15.5)
TOTAL COMPREHENSIVE INCOME	1,165.4		855.0		957.3
Less: comprehensive income attributable to non-controlling interests	19.5		16.5		18.5
COMPREHENSIVE INCOME ATTRIBUTABLE TO IPG	$	1,145.9	$	838.5	$	938.8

The accompanying notes are an integral part of these financial statements.

52

THE INTERPUBLIC GROUP OF COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Amounts in Millions)

	December 31, 2023		December 31, 2022
ASSETS:
Cash and cash equivalents	$	2,386.1	$	2,545.3
Accounts receivable, net of allowance of $46.4 and $48.6, respectively	5,768.8		5,316.0
Accounts receivable, billable to clients	2,229.2		2,023.0
Prepaid expenses	415.8		351.3
Assets held for sale	21.9		5.9
Other current assets	128.6		83.7
Total current assets	10,950.4		10,325.2
Property and equipment, net of accumulated depreciation and amortization of $1,224.9 and $1,244.8, respectively	636.7		637.4
Deferred income taxes	265.0		271.7
Goodwill	5,080.9		5,050.6
Other intangible assets	743.6		818.1
Operating lease right-of-use assets	1,162.6		1,277.5
Other non-current assets	428.1		431.2
TOTAL ASSETS	$	19,267.3	$	18,811.7
LIABILITIES:
Accounts payable	$	8,355.0	$	8,235.3
Accrued liabilities	705.8		787.1
Contract liabilities	684.7		680.0
Short-term borrowings	34.2		44.3
Current portion of long-term debt	250.1		0.6
Current portion of operating leases	252.6		235.9
Liabilities held for sale	48.5		—
Total current liabilities	10,330.9		9,983.2
Long-term debt	2,917.5		2,870.7
Non-current operating leases	1,216.8		1,380.1
Deferred compensation	223.6		294.1
Other non-current liabilities	532.4		572.6
TOTAL LIABILITIES	15,221.2		15,100.7
Redeemable non-controlling interests (see Note 6)	42.3		38.3
STOCKHOLDERS’ EQUITY:
Common stock, $0.10 par value, shares authorized: 800.0     shares issued: 2023 – 383.0; 2022 – 389.6     shares outstanding: 2023 – 378.7; 2022 – 386.5	38.3		38.9
Additional paid-in capital	728.5		1,057.5
Retained earnings	4,254.5		3,632.1
Accumulated other comprehensive loss, net of tax	(946.2)		(993.7)
	4,075.1		3,734.8
Less: Treasury stock, at cost: 2023 – 4.3 shares; 2022 – 3.1 shares	132.5		120.2
Total IPG stockholders’ equity	3,942.6		3,614.6
Non-controlling interests	61.2		58.1
TOTAL STOCKHOLDERS’ EQUITY	4,003.8		3,672.7
TOTAL LIABILITIES AND EQUITY	$	19,267.3	$	18,811.7

The accompanying notes are an integral part of these financial statements.

53

THE INTERPUBLIC GROUP OF COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in Millions)

	Years ended December 31,
	2023		2022		2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	1,118.1	$	956.1	$	972.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	264.3		274.0		283.8
Amortization of restricted stock and other non-cash compensation	46.7		50.0		70.1
Provision for uncollectible receivables	7.2		(8.9)		(14.6)
Deferred income tax	5.1		(27.0)		(8.2)
Net amortization of bond discounts and deferred financing costs	2.0		3.0		5.7
Loss on early extinguishment of debt	—		—		74.0
Non-cash restructuring charges	(0.9)		101.8		9.8
Net (gains) losses on sales of businesses	(17.9)		11.3		19.4
Other	26.8		13.4		18.7
Changes in assets and liabilities, net of acquisitions and divestitures, providing (using) cash:
Accounts receivable	(385.3)		(362.7)		(647.6)
Accounts receivable, billable to clients	(181.4)		244.5		(571.0)
Prepaid Expenses	(46.0)		(55.6)		(26.7)
Other current assets	(42.2)		(5.5)		(19.2)
Accounts payable	47.8		(408.0)		1,858.1
Accrued liabilities	(63.6)		(102.8)		108.9
Contract liabilities	(5.4)		17.8		40.9
Other non-current assets and liabilities	(220.6)		(59.3)		(99.3)
Net cash provided by operating activities	554.7		642.1		2,075.6
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(179.3)		(178.1)		(195.3)
Purchase of short-term marketable securities	(97.6)		(0.2)		(0.2)
Acquisitions, net of cash acquired	(6.3)		(232.2)		—
Deconsolidation of a subsidiary	—		(20.4)		(16.3)
Net proceeds from investments	35.1		2.6		34.8
Proceeds from sale of businesses, net of cash sold	58.7		(22.4)		(13.3)
Maturity of short-term marketable securities	100.7		—		—
Other investing activities	3.3		20.6		5.0
Net cash used in investing activities	(85.4)		(430.1)		(185.3)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock dividends	(479.1)		(457.3)		(427.7)
Repurchases of common stock	(350.2)		(320.1)		—
Tax payments for employee shares withheld	(58.9)		(40.3)		(25.5)
Distributions to non-controlling interests	(17.7)		(12.3)		(15.5)
Acquisition-related payments	(12.9)		(9.3)		(28.0)
Net decrease in short-term borrowings	(8.2)		(29.4)		(10.8)
Repayment of long-term debt	(0.5)		(0.7)		(504.1)
Exercise of stock options	0.0		0.0		8.0
Settlement of senior note	—		(29.9)		—
Early extinguishment of long-term debt	—		—		(1,066.8)
Proceeds from long-term debt	296.3		—		998.1
Other financing activities	(3.1)		(0.1)		(11.9)
Net cash used in financing activities	(634.3)		(899.4)		(1,084.2)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	7.0		(31.7)		(45.4)
Net (decrease) increase in cash, cash equivalents and restricted cash	(158.0)		(719.1)		760.7
Cash, cash equivalents and restricted cash at beginning of period	2,553.1		3,272.2		2,511.5
Cash, cash equivalents and restricted cash at end of period	$	2,395.1	$	2,553.1	$	3,272.2

The accompanying notes are an integral part of these financial statements.

54

THE INTERPUBLIC GROUP OF COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Amounts in Millions)

	Common Stock			Additional Paid-In Capital		Retained Earnings		Accumulated  Other Comprehensive Loss, Net of Tax		Treasury Stock		Total IPG Stockholders’ Equity		Non-controlling Interests		Total Stockholders’ Equity
	Shares	Amount
Balance at December 31, 2020	390.9	$	39.0	$	1,099.3	$	2,636.9	$	(880.2)	$	0.0	$	2,895.0	$	48.9	$	2,943.9
Net income						952.8						952.8		20.0		972.8
Other comprehensive loss								(14.0)				(14.0)		(1.5)		(15.5)
Reclassifications related to redeemable     non-controlling interests				11.3								11.3		11.4		22.7
Distributions to non-controlling interests														(15.5)		(15.5)
Change in redemption value of redeemable     non-controlling interests				39.8		(7.4)						32.4				32.4
Common stock dividends ($1.08 per share)						(428.0)						(428.0)				(428.0)
Stock-based compensation	3.8	0.3		95.5								95.8				95.8
Exercise of stock options	0.6	0.1		8.7								8.8				8.8
Shares withheld for taxes	(1.0)	(0.1)		(28.0)								(28.1)				(28.1)
Other				0.0								0.0		(0.1)		(0.1)
Balance at December 31, 2021	394.3	$	39.3	$	1,226.6	$	3,154.3	$	(894.2)	$	0.0	$	3,526.0	$	63.2	$	3,589.2
Net income						938.0						938.0		18.1		956.1
Other comprehensive loss								(99.5)				(99.5)		(1.6)		(101.1)
Reclassifications related to redeemable     non-controlling interests				(3.1)								(3.1)		0.5		(2.6)
Distributions to non-controlling interests														(12.3)		(12.3)
Change in redemption value of redeemable     non-controlling interests						(3.0)						(3.0)				(3.0)
Retirement of treasury stock	(7.2)	(0.7)		(199.2)						199.9		0.0				0.0
Repurchases of common stock										(320.1)		(320.1)				(320.1)
Common stock dividends ($1.16 per share)						(457.2)						(457.2)				(457.2)
Stock-based compensation	3.5	0.4		71.2								71.6				71.6
Shares withheld for taxes	(1.0)	(0.1)		(38.7)								(38.8)				(38.8)
Other				0.7								0.7		(9.8)		(9.1)
Balance at December 31, 2022	389.6	$	38.9	$	1,057.5	$	3,632.1	$	(993.7)	$	(120.2)	$	3,614.6	$	58.1	$	3,672.7

The accompanying notes are an integral part of these financial statements.

55

THE INTERPUBLIC GROUP OF COMPANIES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Amounts in Millions)

	Common Stock			Additional Paid-In Capital		Retained Earnings		Accumulated  Other Comprehensive Loss, Net of Tax		Treasury Stock		Total IPG Stockholders’ Equity		Non-controlling Interests		Total Stockholders’ Equity
	Shares	Amount
Balance at December 31, 2022	389.6	$	38.9	$	1,057.5	$	3,632.1	$	(993.7)	$	(120.2)	$	3,614.6	$	58.1	$	3,672.7
Net income						1,098.4						1,098.4		19.7		1,118.1
Other comprehensive income								47.5				47.5		(0.2)		47.3
Reclassifications related to redeemable     non-controlling interests														0.3		0.3
Distributions to non-controlling interests														(17.7)		(17.7)
Change in redemption value of redeemable     non-controlling interests						2.6						2.6				2.6
Retirement of treasury stock	(9.3)	(0.9)		(339.5)						340.4		0.0				0.0
Repurchase of common stock										(352.7)		(352.7)				(352.7)
Common stock dividends ($1.24 per share)						(478.6)						(478.6)				(478.6)
Stock-based compensation	4.4	0.5		69.6								70.1				70.1
Shares withheld for taxes	(1.7)	(0.2)		(59.1)								(59.3)				(59.3)
Other				0.0								0.0		1.0		1.0
Balance at December 31, 2023	383.0	$	38.3	$	728.5	$	4,254.5	$	(946.2)	$	(132.5)	$	3,942.6	$	61.2	$	4,003.8

The accompanying notes are an integral part of these financial statements.

56

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 1:  Summary of Significant Accounting Policies

Business Description

The Interpublic Group of Companies, Inc. and subsidiaries (the “Company,” “IPG,” “we,” “us” or “our”) is one of the world’s premier global advertising and marketing services companies. Our agencies create customized marketing programs for clients that range in scale from large global marketers to regional and local clients. Comprehensive global services are critical to effectively serve our multinational and local clients in markets throughout the world, as they seek to build brands, increase sales of their products and services and gain market share.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but have the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are recorded at cost, less any impairment, adjusted for subsequent observable price changes. All intercompany accounts and transactions have been eliminated in consolidation.

We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

Basis of Presentation

We conduct our business across three reportable segments described in Note 15. The three reportable segments are: Media, Data & Engagement Solutions ("MD&E"), Integrated Advertising & Creativity Led Solutions ("IA&C"), and Specialized Communications & Experiential Solutions ("SC&E").

Cost of services is comprised of the expenses of our revenue-producing operating segments including salaries and related expenses, office and other direct expenses and billable expenses, as well as an allocation of the centrally managed expenses from Corporate and other. Office and other direct expenses include rent expense, professional fees, certain expenses incurred by our staff in servicing our clients and other costs directly attributable to client engagements.

Selling, general and administrative expenses are primarily the unallocated expenses from Corporate and other, as disclosed further in Note 15, excluding depreciation and amortization.

Depreciation and amortization of the fixed assets and intangible assets of the Company is disclosed as a separate operating expense.

Restructuring charges relate to the Company's implementation of cost initiatives to better align our cost structure with our revenue, as discussed further in Note 11.

Reclassifications

Certain reclassifications and immaterial adjustments have been made to prior-period financial statements to conform to the current-period presentation. Additionally, certain prior period amounts, wherever applicable, have been recast to reflect the transfer of certain agencies between reportable segments.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates under different assumptions or conditions. A further decline in macroeconomic conditions or increasing interest rates could have a negative impact on these estimates, including the fair value of certain estimates.

Revenue Recognition

Our revenues are primarily derived from the planning and execution of multi-channel advertising and communications, marketing services, including public relations, meeting and event production, sports and entertainment marketing, corporate and brand identity, strategic marketing consulting, and providing marketing data and technology services around the world.

Most of our client contracts are individually negotiated and, accordingly, the terms of client engagements and the basis on which we earn fees and commissions vary significantly. Our contracts generally provide for termination by either party on relatively short notice, usually 30 to 90 days, although our data management contracts typically have non-cancelable terms of

57

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

more than one year. Our payment terms vary by client, and the time between invoicing date and due date is typically not significant. We generally have the legally enforceable right to payment for all services provided through the end of the contract or termination date.

We recognize revenue when we determine our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue recognition, we perform the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue as or when we satisfy the performance obligation. We only apply the five-step model to contracts when it is probable that IPG will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, we assess the goods or services promised within each contract and determine those that are distinct performance obligations. We then assess whether we act as an agent or a principal for each identified performance obligation and include revenue within the transaction price for third-party costs when we determine that we act as principal. We typically do not capitalize costs to obtain a contract as these amounts would generally be recognized over a period of one year or less.

Revenue before billable expenses, primarily consisting of fees, commissions and performance incentives, represents the amount of our gross billings excluding billable expenses charged to a client. Generally, our compensation is based on a negotiated fixed price, rate per hour, a retainer, commission or volume. The majority of our fees are recognized over time as services are performed, either utilizing a function of hours incurred and rates per hour, as compared to periodically updated estimates to complete, or ratably over the term of the contract. For certain less-frequent commission-based contracts which contain clauses allowing our clients to terminate the arrangement at any time for no compensation, revenue is recognized at a point in time, typically the date of broadcast or publication. We report revenue net of taxes assessed by governmental authorities that are directly imposed on our revenue-producing transactions.

Contractual arrangements with clients may also include performance incentive provisions designed to link a portion of our revenue to our performance relative to mutually agreed-upon qualitative and/or quantitative metrics. Performance incentives are treated as variable consideration which is estimated at contract inception and included in revenue based on the most likely amount earned out of a range of potential outcomes. Our estimates are based on a combination of historical award experience, anticipated performance and our best judgment. These estimates are updated on a periodic basis and are not expected to result in a reversal of a significant amount of the cumulative revenue recognized.

The predominant component of billable expenses are third-party vendor costs incurred for performance obligations where we have determined that we are acting as principal. These third-party expenses are generally billed back to our clients. Billable expenses also includes incidental costs incurred in the performance of our services including airfare, mileage, hotel stays, out-of-town meals and telecommunication charges. We record these billable expenses within total revenue with a corresponding offset to operating expenses.

In international markets, we may receive rebates or credits from vendors based on transactions entered into on behalf of clients. Rebates and credits are remitted back to our clients in accordance with our contractual requirements or may be retained by us based on the terms of a particular client contract and local law. Amounts owed back to clients are recorded as a liability and amounts retained by us are recorded as revenue when earned.

In certain international markets, our media contracts may allow clients to terminate our arrangement at any time for no compensation to the extent that media has not yet run. For those contracts, we do not recognize revenue until the media runs which is the point in time at which we have a legally enforceable right to compensation.

In the normal course of business, certain agencies may enter into agreements with media suppliers to purchase an agreed value of media within a fixed timeframe. By entering into these agreements, the agency is taking a risk and may be required to pay a portion or all of the agreed value ahead of media being run. In order to participate in these arrangements and receive an agreed additional benefit from the agency, clients are required to contractually opt in.

Performance Obligations

Our client contracts may include various goods and services that are capable of being distinct, are distinct within the context of the contract and are therefore accounted for as separate performance obligations. We allocate revenue to each performance obligation in the contract at inception based on its relative standalone selling price.

Our advertising businesses include a wide range of services that involve the creation of an advertising idea, concept, campaign, or marketing strategy in order to promote the client’s brand ("creative services"), and to act as an agent to facilitate the production of advertisements by third-party suppliers ("production services”). Our clients can contract us to perform one or both of these services, as they can derive stand-alone benefit from each. Production services can include formatting creative material for different media and communication mediums including digital, large-scale reproduction such as printing and

58

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

adaptation services, talent engagement and acquisition, television and radio production, and outdoor billboard production. Our contracts that include both services are typically explicit in the description of which activities constitute the creative advertising services and those that constitute the production services. Both the creative and production services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our advertising contracts.

Our media businesses include services to formulate strategic media plans ("media planning services") and to act as an agent to purchase media (e.g. television and radio spots, outdoor advertising, digital banners, etc.) from vendors on our clients' behalf ("media buying services"). Our contracts that include both services are typically explicit in the description of which activities constitute the planning services and those that constitute the buying services. Both the planning and buying services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our media contracts.

Our events businesses include creative services related to the conception and planning of custom marketing events as well as activation services which entail the carrying out of the event, including, but not limited to, set-up, design and staffing. Additionally, our public relations businesses include a broad range of services, such as strategic planning, social media strategy and the monitoring and development of communication strategies, among others. While our contracts in these businesses may include some or all of these services, we typically identify only one performance obligation in the assessment of our events and public relations contracts as we provide a significant service of integrating the individual services into a combined service for which the customer has contracted.

Our data and technology services businesses include data management, data and data strategy, identity resolution, and measurement and analytics products and services. While our contracts in these businesses may include some or all of these services, we typically identify each product and service as an individual performance obligation.

We have elected not to disclose information about remaining performance obligations that have original expected durations of one year or less. The majority of our contracts are for periods of one year or less with the exception of our data management contracts.

Principal vs. Agent

When a third-party is involved in the delivery of our services to the client, we assess whether or not we are acting as a principal or an agent in the arrangement. The assessment is based on whether we control the specified services at any time before they are transferred to the customer. We have determined that in our events and public relations businesses, we generally act as a principal as our agencies provide a significant service of integrating goods or services provided by third parties into the specified deliverable to our clients. In addition, we have determined that we are responsible for the performance of the third-party suppliers, which are combined with our own services, before transferring those services to the customer. We have also determined that we act as principal when providing creative services and media planning services, as we perform a significant integration service in these transactions. For performance obligations in which we act as principal, we record the gross amount billed to the customer within total revenue and the related incremental direct costs incurred as billable expenses.

In the vast majority of our business, when a third-party is involved in the production of an advertising campaign and for media buying services, we have determined that we act as the agent and are solely arranging for the third-party suppliers to provide services to the customer. Specifically, we do not control the specified services before transferring those services to the customer, we are not primarily responsible for the performance of the third-party services, nor can we redirect those services to fulfill any other contracts. We do not have inventory risk or discretion in establishing pricing in our contracts with customers. For performance obligations for which we act as the agent, we record our revenue as the net amount of our gross billings less amounts remitted to third parties.

Cash and Cash Equivalents

Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

Allowance for Expected Credit Losses

The allowance for credit losses on expected future uncollectible accounts receivable is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

59

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Accounts Receivable, Billable to Clients

Accounts receivable, billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in accounts receivable, billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

Accounts Payable

Accounts payable includes all operating payables, including those related to all media and production costs. These payables are due within one year.

Investments

Equity investments with readily determinable fair values, other than those accounted for using the equity method of accounting, will be measured at fair value. We regularly review our investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment, with changes to fair value recorded in earnings. We evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if a decline in value of an investment has occurred.

Derivatives

We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the changes in the fair value of the derivative are recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings. If a derivative is a net investment hedge, then the changes in the fair value of the derivative are recognized in other comprehensive income in the same period as the change in fair value of the underlying hedged foreign investment.

Property and Equipment

Furniture, equipment, leasehold improvements and buildings are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture and equipment, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements. Land is stated at cost and is not depreciated.

We capitalize certain internal and external costs incurred to acquire or create internal use software, principally related to our enterprise resource planning (“ERP”) systems. Our ERP systems are stated at cost, net of accumulated amortization, and are amortized using the straight-line method over 10 years. All other internal use computer software are stated at cost, net of accumulated amortization and are amortized using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years.

Leases

As of December 31, 2023, we do not have a material amount of finance leases and the majority of our operating leases, for which we serve as the lessee, consist primarily of real-estate property for our offices around the world. Both the right-of-use asset and lease liability are measured at the present value of the future lease payments, with the asset being subject to adjustments such as initial direct costs, prepaid lease payments, and lease incentives. Many of our leases provide for renewal and/or termination options, as well as escalation clauses, which are also factored into our lease payments when appropriate. The discount rate used to measure the lease asset and liability is determined at the beginning of the lease term using the rate implicit in the lease, if readily determinable, or using the Company's collateralized credit-adjusted borrowing rate.

Goodwill and Other Intangible Assets

We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of

60

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

We review goodwill as of October 1st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 10 reporting units that were subject to the 2023 annual impairment testing. Our annual impairment review as of October 1, 2023 did not result in an impairment charge for any of our reporting units.

Intangible assets with indefinite useful lives are not amortized but are evaluated for impairment annually or more frequently if events or changes in circumstances indicate that impairment may exist. The Company first assesses qualitative factors to determine whether it is necessary to perform a quantitative impairment test for indefinite-lived intangible assets. Impairment exists if the fair value of the indefinite-lived intangible asset is less than the carrying value. The determination of fair value is based on the relief from royalty method of the income approach, which models the cash flows from indefinite-lived intangibles assuming royalties were received under a licensing arrangement. This discounted cash flow analysis includes assumptions related to forecasted future revenues attributable to indefinite-lived intangibles, royalty rates and risk-adjusted discount rates. If the carrying value of an indefinite-lived intangible asset exceeds its estimated fair value, the indefinite-lived intangible asset is considered impaired, and an impairment loss will be recognized in an amount equal to the excess of the carrying value over the fair value. Based on this analysis, for the indefinite lived-intangible asset for which we performed a quantitative impairment test as of October 1, 2023, we concluded that it was not impaired because its fair value was in excess of its carrying value.

For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The sum of the fair values of all our reporting units is also reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the quantitative impairment test is failed and impaired goodwill is written down to its fair value with a charge to expense in the period the impairment is identified.

The fair value of each reporting unit for 2023 and 2022 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data.

We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these asset groups. These asset groups are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

Foreign Currencies

The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax loss of $5.7 for the year ended December 31, 2023, a pre-tax gain of $2.5 for the year ended December 31, 2022, and a pre-tax loss of $5.0 for the year ended December 31, 2021.

We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country is changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses are recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

61

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Income Taxes

The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. The factors used in assessing valuation allowances include all available evidence, such as past operating results, estimates of future taxable income and the feasibility of tax planning strategies. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Redeemable Non-controlling Interests

Many of our acquisitions include provisions under which the non-controlling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable non-controlling interests may be contingent on projected operating performance and satisfying other conditions specified in the related agreements. These payments are also subject to revision in accordance with the terms of the agreements. We record these redeemable non-controlling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable non-controlling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings but will not impact net income. Adjustments as a result of currency translation will affect the redeemable non-controlling interest balance, but do not impact retained earnings or additional paid-in capital.

Earnings Per Share (“EPS”)

Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued.

Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities were exercised. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation.

We may be required to calculate basic EPS using the two-class method as a result of our redeemable non-controlling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable non-controlling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2023, 2022 and 2021, there was no impact to EPS for adjustments related to our redeemable non-controlling interests.

Pension and Postretirement Benefits

We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

62

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Stock-Based Compensation

Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

Treasury Stock

We account for repurchased common stock under the cost method and include such treasury stock as a component of our Consolidated Statements of Stockholders' Equity. Upon retirement, we reduce common stock for the par value of the shares being retired and the excess of the cost of the shares over par value as a reduction to APIC, to the extent there is APIC in the same class of stock, and any remaining amount to retained earnings. These retired shares remain authorized but unissued.

In October 2023, we retired 9.3 shares of our treasury stock, which resulted in a reduction in common stock of $0.9, treasury stock of $340.4 and APIC of $339.5. In October 2022, we retired 7.2 shares of our treasury stock, which resulted in a reduction in common stock of $0.7, treasury stock of $199.9 and APIC of $199.2. During 2021, there was no significant treasury stock activity due to the suspension of the share repurchase program.

Note 2:  Revenue

Disaggregation of Revenue

The following is a description of the principal activities, by reportable segment, from which we generate revenue. For more detailed information about reportable segments, see Note 15.

Media, Data & Engagement Solutions

The MD&E segment provides, and is distinguished by innovative capabilities and scale in, global media and communications services, digital services and products, advertising and marketing technology, e‐commerce services, data management and analytics, strategic consulting, and digital brand experience. MD&E is comprised of IPG Mediabrands and Acxiom, as well as our digital and commerce specialist agencies, which include MRM, R/GA, and Huge.

Integrated Advertising & Creativity Led Solutions

The IA&C segment provides advertising, corporate and brand identity services, and strategic consulting. IA&C is distinguished by the leading role of complex integrations of ideation and the execution of advertising and creative campaigns across all communications channels that are foundational to client brand identities. IA&C is comprised of leading global networks and agencies that provide a broad range of services, including McCann Worldgroup, IPG Health, MullenLowe Group, Foote, Cone & Belding ("FCB"), and our domestic integrated agencies.

Specialized Communications & Experiential Solutions

The SC&E segment provides best-in-class global public relations and other specialized communications services, events, sports and entertainment marketing, and strategic consulting. SC&E is comprised of agencies that provide a range of marketing services expertise, including Weber Shandwick, Golin, our sports, entertainment, and experiential agencies and IPG DXTRA Health.

63

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Principal Geographic Markets

Our agencies are located in over 100 countries, including every significant world market. Our geographic revenue breakdown is listed below.

	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	7,033.1	$	7,031.0	$	6,360.2
International:
United Kingdom	891.5		902.7		880.5
Continental Europe	901.3		867.5		892.8
Asia Pacific	868.3		918.5		970.1
Latin America	477.0		454.9		430.3
Other	718.1		753.2		706.8
Total International	3,856.2		3,896.8		3,880.5
Total Consolidated	$	10,889.3	$	10,927.8	$	10,240.7

	Years ended December 31,
Revenue before billable expenses:	2023		2022		2021
United States	$	6,102.2	$	6,157.7	$	5,763.1
International:
United Kingdom	759.2		742.2		781.5
Continental Europe	795.7		764.6		799.7
Asia Pacific	729.8		772.7		791.4
Latin America	448.7		423.6		396.4
Other	565.0		588.6		575.8
Total International	3,298.4		3,291.7		3,344.8
Total Consolidated	$	9,400.6	$	9,449.4	$	9,107.9

MD&E	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	2,731.4	$	2,730.2	$	2,584.7
International	1,663.4		1,651.4		1,611.9
Total MD&E	$	4,394.8	$	4,381.6	$	4,196.6
Revenue before billable expenses:
United States	$	2,703.5	$	2,690.9	$	2,552.0
International	1,623.0		1,606.0		1,565.7
Total MD&E	$	4,326.5	$	4,296.9	$	4,117.7

64

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

IA&C	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	2,508.8	$	2,585.9	$	2,403.3
International	1,493.4		1,554.7		1,638.5
Total IA&C	$	4,002.2	$	4,140.6	$	4,041.8
Revenue before billable expenses:
United States	$	2,383.8	$	2,483.7	$	2,306.0
International	1,249.4		1,282.6		1,373.7
Total IA&C	$	3,633.2	$	3,766.3	$	3,679.7

SC&E	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	1,792.9	$	1,714.9	$	1,372.2
International	699.4		690.7		630.1
Total SC&E	$	2,492.3	$	2,405.6	$	2,002.3
Revenue before billable expenses:
United States	$	1,014.9	$	983.1	$	905.1
International	426.0		403.1		405.4
Total SC&E	$	1,440.9	$	1,386.2	$	1,310.5

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers.

	December 31, 2023		December 31, 2022
Accounts receivable, net of allowance of $46.4 and $48.6, respectively	$	5,768.8	$	5,316.0
Accounts receivable, billable to clients	2,229.2		2,023.0
Contract assets	68.6		67.4
Contract liabilities (deferred revenue)	684.7		680.0

Contract assets are primarily comprised of contract incentives that are generally satisfied annually under the terms of our contracts and are transferred to accounts receivable when the right to payment becomes unconditional. Contract liabilities relate to advance consideration received from customers under the terms of our contracts primarily related to reimbursements of third-party expenses, whether we act as principal or agent, and to a lesser extent, periodic retainer fees, both of which are generally recognized shortly after billing.

The majority of our contracts are for periods of one year or less with the exception of our data management contracts. For those contracts with a term of more than one year, we had approximately $716.5 of unsatisfied performance obligations as of December 31, 2023, which will be recognized as services are performed over the remaining contractual terms through 2028.

Note 3:  Leases

As of December 31, 2023 and 2022, the majority of our operating leases, for which we serve as the lessee, consist primarily of real-estate property for our offices around the world, and we do not have a material amount of finance leases. Both the right-of-use asset and lease liability are measured at the present value of the future lease payments, with the asset being subject to adjustments such as initial direct costs, prepaid lease payments, and lease incentives. Many of our leases provide for renewal and/or termination options, as well as escalation clauses, which are also factored into our lease payments when appropriate. As of December 31, 2023, our leases have remaining lease terms of 1 year to 13 years. The discount rate used to measure the lease

65

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

asset and liability is determined at the beginning of the lease term using the rate implicit in the lease, if readily determinable, or using the Company's collateralized credit-adjusted borrowing rate.

The following tables present information on our operating leases for the full years of 2023, 2022 and 2021.

	Years ended December 31,
	2023			2022			2021
Operating lease cost	$	268.4		$	290.7		$	306.0
Short-term lease cost	7.9			6.4			8.1
Sublease income	(26.4)			(23.8)			(21.1)
Total lease cost	$	249.9		$	273.3		$	293.0
Cash paid related to operating lease liabilities	$	299.5		$	320.9		$	347.6
Right-of-use assets obtained in exchange for lease liabilities	$	83.0		$	93.0		$	431.0
	As of December 31,
	2023			2022			2021
Weighted-average remaining lease term	Seven years			Eight years			Eight years
Weighted-average discount rate	3.63		%	3.51		%	3.45		%

Our future payments of our operating leases as of December 31, 2023 are listed in the table below.

Period	Payments
2024	$	299.6
2025	270.1
2026	249.8
2027	215.4
2028	170.9
Thereafter	458.4
Total future lease payments	1,664.2
Less: imputed interest	194.8
Present value of future lease payments	1,469.4
Less: current portion of operating leases	252.6
Non-current operating leases	$	1,216.8

As of December 31, 2023, we had additional operating leases that had not yet commenced with future lease payments of approximately $81.0 commencing in 2024 with lease terms of 1 to 12 years.

66

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 4:  Debt and Credit Arrangements

Long-Term Debt

A summary of the carrying amounts of our long-term debt is listed below.

	Effective Interest Rate		December 31,
			2023 1		2022 1
4.200% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.0 and $0.1, respectively)	4.240	%	$	249.9	$	249.7
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $0.9 and $2.1, respectively)	4.780	%	497.0		496.4
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $2.6 and $3.8, respectively)	4.920	%	643.6		642.6
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.7 and $3.3, respectively)	2.512	%	496.0		495.5
5.375% Senior Notes due 2033 (less unamortized discount and issuance costs of $3.6 and $3.0, respectively)	5.650	%	293.4		—
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $0.9 and $5.0, respectively)	3.448	%	494.1		493.7
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.6 and $4.6, respectively)	5.480	%	492.8		492.6
Other notes payable and capitalized leases			0.8		0.8
Total long-term debt			3,167.6		2,871.3
Less: current portion			250.1		0.6
Long-term debt, excluding current portion			$	2,917.5	$	2,870.7

1See Note 13 for information on the fair value measurement of our long-term debt.

Annual maturities are scheduled as follows based on the book value as of December 31, 2023.

2024	$	250.1
2025	0.2
2026	0.2
2027	0.1
2028	497.0
Thereafter	2,420.0
Total long-term debt	$	3,167.6

For those debt securities that have a premium or discount at the time of issuance, we amortize the amount through interest expense based on the maturity date or the first date the holders may require us to repurchase the debt securities, if applicable. A premium would result in a decrease in interest expense, and a discount would result in an increase in interest expense in future periods. Additionally, we have debt issuance costs related to certain financing transactions which are also amortized through interest expense. As of December 31, 2023 and 2022, we had total unamortized debt issuance costs of $22.7 and $26.2, respectively. Our debt securities include covenants that, among other things, limit our liens and the liens of certain of our consolidated subsidiaries, but do not require us to maintain any financial ratios or specified levels of net worth or liquidity.

As of December 31, 2023 and 2022, the estimated fair value of the Company's long-term debt was $2,975.3 and $2,552.3, respectively. Refer to Note 13 for details.

67

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Debt Transactions

5.375% Senior Notes due 2033

On June 8, 2023, we issued a total of $300.0 in aggregate principal amount of 5.375% unsecured senior notes (the "5.375% Senior Notes") due June 15, 2033. Upon issuance, the 5.375% Senior Notes were reflected in our unaudited Consolidated Balance Sheets at $292.9, net of discount of $3.8 and net of capitalized debt issuance costs, including commissions and offering expenses of $3.3, both of which will be amortized in interest expense through the maturity date using the effective interest method. Interest is payable semi-annually in arrears on June 15th and December 15th of each year, which commenced on December 15, 2023.

Credit Arrangement

We maintain a committed corporate credit facility, originally dated as of July 18, 2008, which has been amended and restated from time to time (the "Credit Agreement"). We use our Credit Agreement to increase our financial flexibility, to provide letters of credit primarily to support obligations of our subsidiaries and to support our commercial paper program. On November 1, 2021, we amended and restated the Credit Agreement. As amended, among other things, the maturity date of the Credit Agreement was extended to November 1, 2026 and the cost structure of the Credit Agreement was changed. The Credit Agreement continues to include a required leverage ratio, of not more than 3.50 to 1.00, among other customary covenants like limitations on our liens and the liens of our consolidated subsidiaries and limitations on the incurrence of subsidiary debt. At the election of the Company, the leverage ratio may be changed to not more than 4.00 to 1.00 for four consecutive quarters, beginning with the fiscal quarter in which there is an occurrence of one or more acquisitions with an aggregate purchase price of at least $200.0.

The Credit Agreement is a revolving facility, under which amounts borrowed by us or any of our subsidiaries designated under the Credit Agreement may be repaid and reborrowed, subject to an aggregate lending limit of $1,500.0, or the equivalent in other currencies. The Company has the ability to increase the commitments under the Credit Agreement from time to time by an additional amount of up to $250.0, provided the Company receives commitments for such increases and satisfies certain other conditions. The aggregate available amount of letters of credit outstanding may decrease or increase, subject to a sublimit on letters of credit of $50.0, or the equivalent in other currencies. Our obligations under the Credit Agreement are unsecured. As of both December 31, 2023 and 2022, there were no borrowings under the Credit Agreement; however, we had $9.5 and $10.3 of letters of credit under the Credit Agreement, which reduced our total availability to $1,490.5 and $1,489.7, respectively. In addition to other customary covenants, we are required to maintain the financial covenant listed below as of the end of each fiscal quarter for the period of four fiscal quarters then ended pursuant to our Credit Agreement. We were in compliance with all of our covenants in the Credit Agreement as of December 31, 2023.

Under the Credit Agreement, we can elect to receive advances bearing interest based on either the Base Rate or the Eurocurrency rate (each as defined in the Credit Agreement) plus an applicable margin that is determined based on our credit ratings. As of December 31, 2023, the applicable margin was 0.125% for Base Rate advances and 1.125% for Eurocurrency Rate borrowings. Letter of credit fees accrue on the average daily aggregate amount of letters of credit outstanding, at a rate equal to the applicable margin for Eurocurrency rate advances, and fronting fees accrue on the aggregate amount of letters of credit outstanding at an annual rate of 0.250%. We also pay a facility fee on each lender's revolving commitment of 0.125%, which is an annual rate determined based on our credit ratings.

	Financial Covenant
Leverage ratio (not greater than): 1	3.50x

1The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Uncommitted Lines of Credit

We also have uncommitted lines of credit with various banks that permit borrowings at variable interest rates and that are primarily used to fund working capital needs. We have guaranteed the repayment of some of these borrowings made by certain subsidiaries. If we lose access to these credit lines, we would have to provide funding directly to some of our operations. As of December 31, 2023 and 2022, the Company had uncommitted lines of credit in an aggregate amount of $780.7 and $936.2, under which we had outstanding borrowings of $34.2 and $44.3 classified as short-term borrowings on our Consolidated Balance Sheets, respectively. The average amounts outstanding during 2023 and 2022 were $47.9 and $61.2, respectively, with weighted-average interest rates of approximately 7.9% and 4.6%, respectively.

Commercial Paper

68

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

The Company is authorized to issue unsecured commercial paper up to a maximum aggregate amount outstanding at any time of $1,500.0. Borrowings under the commercial paper program are supported by the Credit Agreement described above. Commercial paper proceeds are used for working capital and general corporate purposes, including the repayment of maturing indebtedness and other short-term liquidity needs. Commercial paper maturities vary but may not exceed 397 days from the date of issue. As of both December 31, 2023 and 2022, there was no commercial paper outstanding. There was no outstanding commercial paper under the program during both 2023 and 2022.

Cash Pooling

We aggregate our domestic cash position on a daily basis. Outside the United States, we use cash pooling arrangements with banks to help manage our liquidity requirements. In these pooling arrangements, several IPG agencies agree with a single bank that the cash balances of any of the agencies with the bank will be subject to a full right of set-off against amounts other agencies owe the bank, and the bank provides for overdrafts as long as the net balance for all agencies does not exceed an agreed-upon level. Typically, each agency pays interest on outstanding overdrafts and receives interest on cash balances. Our Consolidated Balance Sheets reflect cash, net of bank overdrafts, under all of our pooling arrangements, and as of December 31, 2023 and 2022 the amounts netted were $2,718.0 and $2,411.2, respectively.

69

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 5:  Earnings Per Share

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.

	Years ended December 31,
	2023		2022		2021
Net income available to IPG common stockholders	$	1,098.4	$	938.0	$	952.8
Weighted-average number of common shares outstanding - basic	384.1		391.5		393.0
Dilutive effect of stock options and restricted shares	1.8		3.6		5.4
Weighted-average number of common shares outstanding - diluted	385.9		395.1		398.4
Earnings per share available to IPG common stockholders:
Basic	$	2.86	$	2.40	$	2.42
Diluted	$	2.85	$	2.37	$	2.39

Note 6:  Acquisitions

We continue to evaluate strategic opportunities to expand our industry expertise, strengthen our position in high-growth and key strategic geographical markets and industry sectors, advance technological capabilities and improve operational efficiency through both acquisitions and increased ownership interests in current investments. Our acquisitions typically provide for an initial payment at the time of closing and additional contingent purchase price payments based on the future performance of the acquired entity. We have entered into agreements that may require us to purchase additional equity interests in certain consolidated and unconsolidated subsidiaries. The amounts at which we record these transactions in our financial statements are based on estimates of the future financial performance of the acquired entity, the timing of the exercise of these rights, changes in foreign currency exchange rates and other factors.

During 2023, we completed two acquisitions, one of which was included in the IA&C reportable segment, and one of which was included in the SC&E reportable segment. We paid $2.6, net of cash acquired and recorded approximately $11.7 of goodwill and $8.5 of other intangible assets related to the acquisitions.

During 2022, we completed one acquisition, recorded in the MD&E reportable segment. On September 23, 2022, we entered into a definitive purchase agreement to acquire approximately 83.9% of the outstanding shares of RafterOne with options to purchase the remaining outstanding shares. The transaction closed on October 3, 2022, subject to customary closing adjustments. We paid $232.2, net of cash acquired, related to the acquisition. The purpose of the acquisition is to combine the Company's media, creative, marketing services and analytics capabilities, global scale and consumer insights, with RafterOne's Salesforce capabilities for commerce, service, data, marketing and customer experience. We recorded approximately $211.7 of goodwill, of which approximately $2.2 was recorded during 2023, and $62.0 of other intangible assets related to the acquisition of RafterOne.

During 2021, no acquisitions occurred.

The results of operations of our acquired companies were included in our consolidated results from the closing date of each acquisition. We did not make any payments in stock related to our acquisitions in 2023, 2022 or 2021.

70

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Details of cash paid for current and prior years' acquisitions are listed below.

	Years ended December 31,
	2023		2022		2021
Cost of investment: current-year acquisitions	$	5.8	$	235.4	$	—
Cost of investment: prior-year acquisitions	16.6		9.3		28.0
Less: net cash acquired	3.2		3.2		—
Total cost of investment	19.2		241.5		28.0
Operating payments 1	2.7		9.6		39.1
Total cash paid for acquisitions 2	$	21.9	$	251.1	$	67.1

1Represents cash payments for amounts that have been recognized in operating expenses since the date of acquisition either relating to adjustments to estimates in excess of the initial value of contingent payments recorded or were contingent upon the future employment of the former owners of the acquired companies. Amounts are reflected in the operating section of the Consolidated Statements of Cash Flows.

2Of the total cash paid for acquisitions, $6.3, $232.2 and $0.0 for the years ended December 31, 2023, 2022 and 2021, respectively, are classified under the investing section of the Consolidated Statements of Cash Flows as acquisitions, net of cash acquired. These amounts relate to initial payments for new transactions, as well as adjustments made to upfront payments related to prior year acquisitions. Of the total cash paid for acquisitions, $12.9, $9.3 and $28.0 for the years ended December 31, 2023, 2022 and 2021, respectively, are classified under the financing section of the Consolidated Statements of Cash Flows as acquisition-related payments. These amounts relate to deferred payments and increases in our ownership interest for prior acquisitions.

For companies acquired, we estimate the fair values of the assets and liabilities based on 100% of the business for consolidation. The purchase price in excess of the estimated fair value of the tangible net assets acquired is allocated to identifiable intangible assets and then to goodwill. Due to the characteristics of advertising, specialized marketing and communication services companies, our acquisitions typically do not have significant amounts of tangible assets since the principal assets we acquire are client relationships and talent. As a result, a substantial portion of the purchase price is primarily allocated to customer lists, trade names and goodwill.

For acquisitions, we record deferred payment and redeemable non-controlling interest amounts on our Consolidated Balance Sheets based on their acquisition-date fair value. Deferred payments are recorded on a discounted basis and adjusted quarterly, if necessary, through operating income or net interest expense, depending on the nature of the arrangement, for both changes in estimate and accretion between the acquisition date and the final payment date. See Note 16 for further information on contingent acquisition obligations. Redeemable non-controlling interests are adjusted quarterly, if necessary, to their estimated redemption value, but not less than their initial fair value. Any adjustments to the redemption value impact retained earnings or additional paid in capital, except for foreign currency translation adjustments. The following table presents changes in our redeemable non-controlling interests.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	38.3	$	15.6	$	93.1
Change in related non-controlling interests balance	(0.3)		(0.5)		2.2
Changes in redemption value of redeemable non-controlling interests:
Additions	7.4		30.3		0.0
Redemptions and other	(0.4)		(9.9)		(41.9)
Redemption value adjustments	(2.6)		3.0		(32.1)
Currency translation adjustments	(0.1)		(0.2)		(5.7)
Balance at end of period	$	42.3	$	38.3	$	15.6

For all acquisitions, if a portion of the deferred payments and purchases of additional interests after the effective date of purchase are contingent upon employment terms, then that amount is accounted for separately from the business combination and recognized as compensation expense over the required earn-out period. Payments deemed as compensation are excluded from the fair value purchase price allocation to tangible net assets and intangible assets acquired.

71

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 7:  Supplementary Data

Valuation and Qualifying Accounts – Accounts Receivable, Allowance for Expected Credit Losses

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	48.6	$	68.5	$	98.3
Charges to costs and expenses 1	7.2		(5.8)		(14.9)
Adjustments:
(Dispositions)/Acquisitions	(1.7)		(0.9)		(3.2)
Uncollectible accounts written off	(7.8)		(12.8)		(9.8)
Recoveries	0.1		1.9		0.3
Foreign currency translation adjustments	0.0		(2.3)		(2.2)
Balance at end of period	$	46.4	$	48.6	$	68.5

1Includes reversals of our allowance for credit losses as a result of improved credit outlook over the course of the COVID-19 pandemic for the years ended December 31, 2022 and December 31, 2021.

Property and Equipment

	December 31,
	2023		2022
Furniture and equipment	$	632.8	$	640.8
Leasehold improvements	507.0		528.6
Internal-use computer software	585.1		581.4
Land and buildings	136.7		131.4
Gross property and equipment	1,861.6		1,882.2
Less: accumulated depreciation and amortization	(1,224.9)		(1,244.8)
Total property and equipment, net	$	636.7	$	637.4

Total depreciation and amortization expense, which excludes the amortization of acquired intangibles, for property and equipment for the years ended December 31, 2023, 2022 and 2021 was $180.3, $189.3 and $197.6, respectively.

Accrued Liabilities

The following table presents the components of accrued liabilities.

	December 31,
	2023		2022
Salaries, benefits and related expenses	$	507.5	$	554.0
Income taxes payable	56.8		64.7
Interest	40.2		37.3
Office and related expenses	22.3		28.9
Acquisition obligations	2.9		18.7
Restructuring charges	0.6		2.2
Other	75.5		81.3
Total accrued liabilities	$	705.8	$	787.1

72

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Other Income (Expense), Net

Results of operations include certain items that are not directly associated with our revenue-producing operations.

	Years ended December 31,
	2023		2022		2021
Net gains/(losses) on sales of businesses	$	17.9	$	(11.3)	$	(19.4)
Loss on early extinguishment of debt	—		—		(74.0)
Other	(7.7)		10.3		22.7
Total other income (expense), net	$	10.2	$	(1.0)	$	(70.7)

Net gains/(losses) on sales of businesses – During 2023, 2022 and 2021, the amounts recognized were related to sales of businesses and the classification of certain assets and liabilities, consisting primarily of accounts receivable and accounts payable, as held for sale within our MD&E, IA&C, and SC&E reportable segments. The businesses held for sale as of year-end primarily represent unprofitable, non-strategic agencies which are expected to be sold within the next twelve months. The sales of businesses and the classification of certain assets and liabilities as held for sale included cash, net of proceeds, of $58.7, $(22.4) and $(13.3) for the years ended 2023, 2022 and 2021, respectively, which is classified within the Proceeds from sale of businesses, net of cash sold line in our Consolidated Statements of Cash Flows.

Loss on early extinguishment of debt – During the first quarter of 2021, we recorded a loss of $74.0 related to the early extinguishment of all $250.0 in aggregate principal amount of our 4.000% Senior Notes, all $500.0 in aggregate principal amount of our 3.750% Senior Notes, and $250.0 of the $500.0 in aggregate principal amount of our 4.200% Senior Notes.

Other – During 2023, the majority of the amounts recognized were primarily related to pension and postretirement costs. During 2022, the majority of the amounts recognized were primarily related to a cash gain from the sale of an equity investment, partially offset by a non-cash loss related to the deconsolidation of a previously consolidated entity in which we maintain an equity interest. During 2021, the majority of the amounts recognized were related to a non-cash gain related to the deconsolidation of a previously consolidated entity in which we maintain an equity interest, and pension and postretirement costs.

Share Repurchase Programs

In February 2022, our Board of Directors (the "Board") reauthorized a program to repurchase, from time to time, up to $400.0 of our common stock.

On February 8, 2023, the Board authorized a share repurchase program to repurchase from time to time up to $350.0, excluding fees, of our common stock, which was in addition to any amounts remaining under the 2022 share repurchase program.

On February 7, 2024, the Board authorized a share repurchase program to repurchase from time to time up to $320.0, excluding fees, of our common stock, which was in addition to any amounts remaining under the 2023 share repurchase program.

We may effect such repurchases through open market purchases, trading plans established in accordance with U.S. Securities and Exchange Commission ("SEC") rules, derivative transactions or other means. The timing and amount of repurchases in future periods will depend on market conditions and other funding requirements.

The following table presents our share repurchase activity under our share repurchase programs for the year ended December 31, 2023, 2022 and 2021.

	Years ended December 31,
	2023		2022		2021
Number of shares repurchased	10.4		10.3		—
Aggregate cost, including fees1	$	350.2	$	320.1	$	—
Average price per share, including fees	$	33.64	$	31.01	$	—

1.The amount for twelve months ended December 31, 2023 excludes $2.5 of estimated excise tax on net share repurchases.

We fully utilized the 2022 share repurchase program during the second quarter of 2023. As of December 31, 2023, $80.1, excluding fees, remains available for repurchase under the 2023 share repurchase program. There are no expiration dates associated with the share repurchase programs.

73

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Supplemental Cash Flow Information

	Years ended December 31,
	2023		2022		2021
Cash paid for interest	$	221.6	$	171.1	$	175.9
Changes in operating lease right-of-use assets and lease liabilities 1	(32.4)		55.1		(35.2)
Cash paid for income taxes, net of refunds 2	320.3		255.7		229.1

1For the year ended December 31, 2023, comprised of the impairments of operating lease right-of-use asset of ($1.2) classified in Non-cash restructuring charges, offset by $31.2 net cash outflow, classified in Other non-current assets and liabilities in our Consolidated Statements of Cash Flows. For the year ended December 31, 2022, comprised of the impairments of operating lease right-of-use asset of $85.4, classified in Non-cash restructuring charges, offset by $30.3 net cash outflow, classified in Other non-current assets and liabilities in our Consolidated Statements of Cash Flows. For the year ended December 31, 2021, comprised of the impairments of operating lease right-of-use asset of $6.3, classified in Non-cash restructuring charges offset by $41.5 net cash outflow, classified in Other non-current assets and liabilities in our Consolidated Statements of Cash Flows.

2Refunds of $40.1, $35.7 and $47.1 were received for the years ended December 31, 2023, 2022 and 2021, respectively.

Note 8: Goodwill and Other Intangible Assets

Goodwill

Goodwill is the excess purchase price remaining from an acquisition after an allocation of purchase price has been made to identifiable assets acquired and liabilities assumed based on estimated fair values. The Company transitioned to the new segment reporting structure effective January 1, 2022 which resulted in certain changes to our operating segments and reporting units. Additionally, the Company transferred certain agencies between operating segments as of January 1, 2023 which resulted in certain changes to our reporting units and reportable segments. We have allocated goodwill to our reporting units using a relative fair value approach. In addition, we completed an assessment of any potential goodwill impairment for all reporting units immediately prior and subsequent to the reallocations and determined that no impairment existed.

The changes in the carrying value of goodwill for our reportable segments, MD&E, IA&C and SC&E, for the years ended December 31, 2023 and 2022 are listed below.

	IAN		DXTRA		MD&E		IA&C		SC&E		Total 1
Balance as of December 31, 2021	$	4,231.6	$	677.1	$	—	$	—	$	—	$	4,908.7
Goodwill Reallocation	(4,231.6)		(677.1)		2,293.0		1,920.2		695.5		—
Balance as of January 1, 2022	$	—	$	—	$	2,293.0	$	1,920.2	$	695.5	$	4,908.7
Acquisitions/(Dispositions) and Deconsolidations	—		—		209.5		(6.5)		—		203.0
Foreign currency and other	—		—		(14.9)		(35.1)		(11.1)		(61.1)
Balance as of December 31, 2022	$	—	$	—	$	2,487.6	$	1,878.6	$	684.4	$	5,050.6
Goodwill Reallocation	—		—		180.6		(180.6)		—		—
Balance as of January 1, 2023	$	—	$	—	$	2,668.2	$	1,698.0	$	684.4	$	5,050.6
Acquisitions/(Dispositions)	—		—		2.2		10.7		(9.8)		3.1
Foreign currency and other	—		—		7.1		14.5		5.6		27.2
Balance as of December 31, 2023	$	—	$	—	$	2,677.5	$	1,723.2	$	680.2	$	5,080.9

1For all periods presented, no goodwill impairment charge has been recorded.

See Note 1 for information regarding our annual impairment testing methodology.

Other Intangible Assets

Other intangible assets primarily consist of customer lists and know-how and technology, which have definite lives and are subject to amortization on a straight-line basis with estimated useful lives generally between 7 and 15 years, as well as trade names which have both indefinite and definite lives which are subject to amortization on a straight-line basis with estimated useful lives of 15 years. Amortization expense for other intangible assets for the years ended December 31, 2023, 2022 and 2021 was $84.0, $84.7 and $86.2, respectively. There were no material impairment charges on other intangibles for the years ended December 31, 2023, 2022 and 2021. During 2023 and 2022, we recorded approximately $8.5 and $62.0, respectively, of other intangible assets related to our acquisitions.

74

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

The following table provides a summary of other intangible assets, which are included in our Consolidated Balance Sheets.

	December 31,
	2023						2022
	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Customer lists	$	882.1	$	(431.6)	$	450.5	$	873.1	$	(378.4)	$	494.7
Know-how and technology	239.5		(138.9)		100.6		239.2		(111.1)		128.1
Trade names	227.3		(45.7)		181.6		231.8		(47.4)		184.4
Other	16.2		(5.3)		10.9		16.2		(5.3)		10.9
Total 1	$	1,365.1	$	(621.5)	$	743.6	$	1,360.3	$	(542.2)	$	818.1

1Total gross amount includes indefinite-lived intangible assets not subject to amortization of $165.7 and $165.4 in the years ended December 31, 2023 and 2022, respectively, which primarily consist of trade names.

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2023 is listed below.

	2024		2025		2026		2027		2028
Estimated amortization expense	$	83.1	$	80.4	$	78.4	$	65.1	$	49.8

Note 9:  Income Taxes

The components of income before income taxes are listed below.

	Years ended December 31,
	2023		2022		2021
Domestic	$	846.7	$	707.4	$	653.6
Foreign	561.3		561.5		568.5
Total	$	1,408.0	$	1,268.9	$	1,222.1

The provision for income taxes is listed below.

	Years ended December 31,
	2023		2022		2021
U.S. federal income taxes (including foreign withholding taxes):
Current	$	97.6	$	168.0	$	105.4
Deferred	(16.2)		(34.9)		13.2
	$	81.4	$	133.1	$	118.6
State and local income taxes:
Current	$	40.4	$	40.4	$	27.4
Deferred	4.3		(5.3)		(0.9)
	$	44.7	$	35.1	$	26.5
Foreign income taxes:
Current	$	148.1	$	137.0	$	127.2
Deferred	17.0		13.2		(20.5)
	$	165.1	$	150.2	$	106.7
Total	$	291.2	$	318.4	$	251.8

75

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

A reconciliation of the effective income tax rate as reflected in our Consolidated Statements of Operations to the U.S. federal statutory income tax rate is listed below.

	Years ended December 31,
	2023			2022			2021
U.S. federal statutory income tax rate	21.0		%	21.0		%	21.0		%
Income tax provision at U.S. federal statutory rate	$	295.7		$	266.5		$	256.6
State and local income taxes, net of U.S. federal income tax benefit	35.3			27.7			21.0
Impact of foreign operations, including withholding taxes	51.4			37.9			47.8
U.S. tax incentives	(24.4)			(23.0)			(28.4)
Change in net valuation allowance 1	(2.5)			8.0			(59.4)
Divestitures	0.5			1.1			1.1
(Decrease)/Increase in unrecognized tax benefits	(61.1)			3.5			13.2
Other	(3.7)			(3.3)			(0.1)
Provision for income taxes	$	291.2		$	318.4		$	251.8
Effective income tax rate on operations	20.7		%	25.1		%	20.6		%

1Reflects changes in valuation allowances that impacted the effective income tax rate for each year presented.

In 2023, our effective income tax rate of 20.7% was positively impacted by a benefit of $64.2 related to the settlement of the 2017 and 2018 U.S. Federal income tax audit. The effective rate also benefited from the net release of previously recorded reserves for various other tax contingencies, and the excess tax benefits on employee share-based payments, the majority of which were recognized in the first quarter due to the timing of the vesting of awards.

In 2022, our effective income tax rate of 25.1% was adversely impacted by the establishment of net valuation allowances primarily in Continental Europe, and by net losses on sales of businesses and the classification of certain assets as held for sale for which we received minimal tax benefit. This was partially offset by excess tax benefits on employee share-based payments, the majority of which were recognized in the first quarter due to the timing of the vesting of awards and by the release of previously recorded reserves for tax contingencies.

In 2021, our effective income tax rate of 20.6% was positively impacted by the reversal of valuation allowances primarily in Continental Europe. This was partially offset by net losses on sales of businesses and the classification of certain assets as held for sale for which we received minimal tax benefit.

76

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

The components of deferred tax assets and liabilities are listed below.

	December 31,
	2023		2022
Postretirement/post-employment benefits	$	15.5	$	12.4
Deferred compensation	65.1		78.1
Pension costs	0.4		6.7
Interest	18.1		38.7
Accruals and reserves	37.0		34.8
Allowance for credit losses	11.3		12.5
Basis differences in fixed assets	72.6		6.3
Operating lease liabilities	322.7		343.5
Tax loss/tax credit carry forwards	260.4		267.0
Other	71.1		43.3
Deferred tax assets	874.2		843.3
Valuation allowance for deferred tax assets	(162.5)		(145.8)
Net deferred tax assets	$	711.7	$	697.5
Basis differences in fixed assets	$	—	$	—
Basis differences in intangible assets	(395.3)		(369.8)
Operating lease right-of-use assets	(252.8)		(269.8)
Prepaid expenses	(11.4)		(10.0)
Deferred revenue	(1.8)		(1.8)
Unremitted foreign earnings	(7.0)		(4.9)
Deferred tax liabilities	(668.3)		(656.3)
Total net deferred tax assets1	$	43.4	$	41.2

1As of December 31, 2023 and 2022, deferred tax assets of $265.0 and $271.7, respectively, and deferred tax liabilities of $221.6 and $230.5, respectively, were separately included in our Consolidated Balance Sheet under Deferred income taxes and Other non-current liabilities.

We evaluate the realizability of our deferred tax assets on a quarterly basis. The realization of our deferred tax assets is primarily dependent on future earnings. The amount of the deferred tax assets considered realizable could be reduced or increased in the near future if estimates of future taxable income are lower or greater than anticipated. A valuation allowance is established when it is “more likely than not” that all or a portion of deferred tax assets will not be realized. In circumstances where there is negative evidence, establishment of a valuation allowance is considered. The factors used in assessing valuation allowances include all available evidence, such as past operating results, estimates of future taxable income and the feasibility of tax planning strategies. We believe that cumulative losses in the most recent three-year period represent significant negative evidence, and as a result, we determined that certain of our deferred tax assets required the establishment of a valuation allowance. The deferred tax assets for which an allowance was recognized relate primarily to state and foreign tax loss carryforwards.

The change in the valuation allowance is listed below.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	145.8	$	146.0	$	197.1
Charged (reversed) to costs and expenses	13.8		8.9		(45.1)
Charged to gross tax assets and other accounts 1	(2.1)		0.6		0.9
Foreign currency translation	5.0		(9.7)		(6.9)
Balance at end of period	$	162.5	$	145.8	$	146.0

1Primarily represents changes to the valuation allowance related to the change of a corresponding deferred tax asset.

In 2023, 2022, and 2021, amounts recorded and reversed to costs and expenses primarily related to increases and decreases in valuation allowances in Continental Europe and North America for existing deferred tax assets.

77

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

As of December 31, 2023, there were $918.1 of loss carryforwards. These loss carryforwards were all non-U.S. tax loss carryforwards, of which $834.3 have unlimited carryforward periods and $83.8 have expiration periods from 2024 to 2043. As of December 31, 2023, the Company also had $22.9 in deferred tax assets for state net operating loss carryforwards and tax credit carryforwards, which will expire between 2024 and 2044.

As of December 31, 2023 and 2022, we had $1,633.6 and $1,496.9, respectively, of undistributed earnings attributable to foreign subsidiaries. The Company has historically asserted that its unremitted foreign earnings are permanently reinvested, and therefore has not recorded any deferred taxes on such amounts. It is not practicable to determine the deferred tax on these undistributed earnings because such liability, if any, is dependent on circumstances that exist if and when a remittance occurs, including the source location and amount of the distribution and foreign withholding taxes.

The table below summarizes the activity related to our unrecognized tax benefits.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	283.5	$	262.6	$	217.6
Increases as a result of tax positions taken during a prior year	50.9		4.9		17.2
Decreases as a result of tax positions taken during a prior year	(68.2)		(10.1)		(10.4)
Settlements with taxing authorities	(5.8)		(0.7)		(8.7)
Lapse of statutes of limitation	(11.4)		(6.4)		(6.2)
Increases as a result of tax positions taken during the current year	42.0		33.2		53.1
Balance at end of period	$	291.0	$	283.5	$	262.6

Included in the total amount of unrecognized tax benefits of $291.0 as of December 31, 2023, is $241.4 of tax benefits that, if recognized, would impact the effective income tax rate. The total amount of accrued interest and penalties as of December 31, 2023 and 2022 is $38.5 and $36.0, respectively, of which expenses of $2.5 and $6.0 are included in our 2023 and 2022 Consolidated Statements of Operations, respectively. In accordance with our accounting policy, interest and penalties accrued on unrecognized tax benefits are classified as income taxes in our Consolidated Statements of Operations.

We have various tax years under examination by tax authorities in the U.S., in various countries, and in various states and localities, such as New York City, in which we have significant business operations. It is not yet known whether these examinations will, in the aggregate, result in our paying additional taxes. We believe our tax reserves are adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and, if necessary, adjust our reserves as additional information or events require.

On May 2, 2023, the Internal Revenue Service notified the Company that the U.S. Federal income tax audit of years 2017 and 2018 has been finalized and settled. As a result, we recognized an income tax benefit of $64.2 in the second quarter of 2023 substantially all of which has been included within 'Decreases as a result of tax positions taken during a prior year' within the above Unrecognized Tax Benefits table.

With respect to all tax years open to examination by U.S. federal, various state and local, and non-U.S. tax authorities, we currently anticipate that total unrecognized tax benefits will decrease by an amount between $95.0 and $105.0 in the next twelve months, a portion of which will affect our effective income tax rate, primarily as a result of the settlement of tax examinations and the lapsing of statutes of limitations. This net decrease is related to various items of income and expense, primarily transfer pricing adjustments.

We are effectively settled with respect to U.S. federal income tax audits through 2019. With limited exceptions, we are no longer subject to state and local income tax audits for years prior to 2015 or non-U.S. income tax audits for years prior to 2011.

78

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 10:  Accumulated Other Comprehensive Loss, Net of Tax

The following table presents the changes in accumulated other comprehensive loss, net of tax, by component.

	Foreign Currency Translation Adjustments		Derivative Instruments		Defined Benefit Pension and Other Postretirement Plans		Total
Balance as of December 31, 2021	$	(723.2)	$	22.9	$	(193.9)	$	(894.2)
Other comprehensive (loss) income before reclassifications	(130.2)		13.2		9.4		(107.6)
Amount reclassified from accumulated other comprehensive loss, net of tax	4.3		(1.1)		4.9		8.1
Balance as of December 31, 2022	$	(849.1)	$	35.0	$	(179.6)	$	(993.7)
Other comprehensive income (loss) before reclassifications	59.5		0.4		(15.8)		44.1
Amount reclassified from accumulated other comprehensive loss, net of tax	0.5		(1.9)		4.8		3.4
Balance as of December 31, 2023	$	(789.1)	$	33.5	$	(190.6)	$	(946.2)

Amounts reclassified from accumulated other comprehensive loss, net of tax, for the years ended December 31, 2023, 2022 and 2021 are as follows:

	Years ended December 31,						Affected Line Item in the Consolidated Statements of Operations
	2023		2022		2021
Foreign currency translation adjustments 1	$	0.5	$	4.3	$	(1.0)	Other income (expense), net
Net (gain) loss on derivative instruments	(2.6)		(1.4)		4.2		Other income (expense), net, Interest Expense
Amortization of defined benefit pension and postretirement plans items	6.5		6.3		10.0		Other income (expense), net
Tax effect	(1.0)		(1.1)		(3.1)		Provision for income taxes
Total amount reclassified from accumulated other comprehensive loss, net of tax	$	3.4	$	8.1	$	10.1

1These foreign currency translation adjustments are primarily a result of the sales of businesses.

79

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 11:  Restructuring Charges

Restructuring Charges

	Years ended December 31,
	20231		20222		20213
Severance and termination costs	$	0.4	$	(0.1)	$	0.4
Lease restructuring costs	(1.2)		85.4		6.3
Other restructuring costs	0.9		17.1		3.9
Total restructuring charges	$	0.1	$	102.4	$	10.6

1The amounts for the year ended December 31, 2023 represent adjustments to the 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020.

2The amounts for the year ended December 31, 2022 represent 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020. The 2022 Real Estate Actions did not include any severance and termination costs.

3The amounts for the year ended December 31, 2021 represent adjustments to the actions taken in 2020.

Lease and Other restructuring costs include impairments of operating lease right-of-use assets and associated leasehold improvements, furniture and asset retirement obligations. Lease impairments were calculated based on estimated fair values using market participant assumptions including forecasted net discounted cash flows related to the operating lease right-of-use assets.

2022 Real Estate Actions

In the fourth quarter of 2022, the Company took Real Estate Actions related to new real estate exits and lease terminations to further optimize the real estate footprint supporting our office-home hybrid service model in a post-pandemic economy. All included opportunities for further efficiencies as a result of the current working environment were identified and completed during the fourth quarter of 2022.

These Real Estate Actions, taken during the fourth quarter of 2022, reduced our occupied global real estate footprint by approximately 6.7% or 500,000 square feet. All restructuring actions were identified and initiated in 2022, with all actions completed by the end of the fourth quarter of 2022.

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2023 is as follows:

			2022 Real Estate Actions
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Lease impairment costs	$	0.0	$	(0.9)	$	(0.9)	$	0.0	$	0.0
Other restructuring costs	0.0		0.8		0.2		0.6		0.0
Total	$	0.0	$	(0.1)	$	(0.7)	$	0.6	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2022 is as follows:

	2022 Real Estate Actions
	Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Lease impairment costs	$	84.4	$	84.4	$	0.0	$	0.0
Other restructuring costs	14.2		13.5		0.7		0.0
Total	$	98.6	$	97.9	$	0.7	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions by segment is as follows:

80

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

	Years ended December 31,
	2023		2022
Restructuring charges:
MD&E	$	(1.0)	$	69.0
IA&C	(0.3)		21.0
SC&E	1.1		8.0
Corporate and other	0.1		0.6
Total	$	(0.1)	$	98.6
Non cash lease impairment costs:
MD&E	$	(1.0)	$	54.3
IA&C	(0.5)		22.3
SC&E	0.4		7.0
Corporate and other	0.2		0.8
Total	$	(0.9)	$	84.4

2020 Restructuring Plan

Beginning in the second quarter of 2020, the Company took restructuring actions to lower its operating expenses structurally and permanently relative to revenue and to accelerate the transformation of our business (the “2020 Plan”).

All restructuring actions were identified and initiated in 2020, with all actions completed by the end of the fourth quarter of 2020 and were based on our experience and learning in the COVID-19 pandemic and a resulting review of our operations to address certain operating expenses such as occupancy expense and salaries and related expenses.

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2023 is as follows:

	2020 Plan
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Severance and termination costs	$	2.3	$	0.4	$	0.0	$	2.1	$	0.6
Lease impairment costs	0.0		(0.3)		(0.3)		0.0		0.0
Other restructuring costs	0.0		0.1		0.1		0.0		0.0
Total	$	2.3	$	0.2	$	(0.2)	$	2.1	$	0.6

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2022 is as follows:

	2020 Plan
	Liability at December 31, 2021		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Severance and termination costs	$	9.4	$	(0.1)	$	0.0	$	7.0	$	2.3
Lease impairment costs	0.0		1.0		1.0		0.0		0.0
Other restructuring costs	0.0		2.9		2.9		0.0		0.0
Total	$	9.4	$	3.8	$	3.9	$	7.0	$	2.3

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2021 is as follows:

81

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

	2020 Plan
	Liability at December 31, 2020		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2021
Severance and termination costs	$	74.6	$	0.4	$	0.3	$	65.3	$	9.4
Lease impairment costs	0.0		6.3		6.3		0.0		0.0
Other restructuring costs	0.0		3.9		3.2		0.7		0.0
Total	$	74.6	$	10.6	$	9.8	$	66.0	$	9.4

A summary of the restructuring activities related to the 2020 Plan by segment is as follows:

	Years ended December 31,
	2023		2022		2021
Restructuring charges:
MD&E	$	(0.3)	$	0.1	$	0.1
IA&C	0.5		7.7		2.6
SC&E	0.0		(4.2)		10.0
Corporate and other	0.0		0.2		(2.1)
Total	$	0.2	$	3.8	$	10.6
Non cash lease impairment costs:
MD&E	$	(0.3)	$	0.0	$	(0.9)
IA&C	0.0		7.0		(0.1)
SC&E	0.0		(5.9)		7.3
Corporate and other	0.0		(0.1)		0.0
Total	$	(0.3)	$	1.0	$	6.3

Note 12:  Incentive Compensation Plans

2019 Performance Incentive Plan

We issue stock-based compensation and cash awards to our employees under various plans established by the Compensation and Leadership Talent Committee of the Board of Directors (the “Compensation Committee”) and approved by our shareholders. In May 2019, our shareholders approved the 2019 Performance Incentive Plan (the “2019 PIP”), replacing the 2014 Performance Incentive Plan (the “2014 PIP”) and previous incentive plans. The number of shares of common stock initially available for grants of all equity awards under the 2019 PIP is 27.0. Pursuant to the terms of the 2019 PIP, the number of shares that may be awarded to any one participant for any stock based awards is limited to 2.0. The vesting period of awards granted is generally commensurate with the requisite service period. We generally issue new shares to satisfy the exercise of stock options or the distribution of other stock-based awards.

Additionally, under the 2019 PIP, we have the ability to issue performance cash awards. The performance cash awards are granted to certain employees who otherwise would have been eligible to receive performance-based stock awards. These awards have a service period vesting condition and a performance vesting condition. The amount of the performance cash award received by an employee with a performance vesting condition can range from 0% to 300% of the target amount of the original grant value, except for Executive Officers of IPG, with a range of 0% to 200%. Performance cash awards generally vest in three years. The Compensation Committee may grant performance cash awards to any eligible employee; however, no employee can receive more than $10.0 during a performance period.

82

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

The amounts of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statements of Operations, and the related tax benefit, are listed below.

	Years ended December 31,
	2023		2022		2021
Stock-settled awards	$	27.8	$	26.3	$	36.7
Cash-settled awards	0.3		0.3		1.0
Performance-based awards	18.9		23.7		33.4
Stock Options	0.3		0.3		0.3
Employee stock purchase plan	2.9		3.1		2.1
Other 1	2.7		2.0		11.3
Stock-based compensation expense	$	52.9	$	55.7	$	84.8
Tax benefit	$	12.5	$	13.1	$	18.0

1Represents charges recorded for severance expense related to stock-based compensation awards.

Stock Options

Stock options are granted with the exercise price equal to the fair market value of our common stock on the grant date. We use the Black-Scholes option-pricing model to estimate the fair value of options granted, which requires the input of subjective assumptions including the option’s expected term and the price volatility of the underlying stock. They are generally first exercisable between two and four years from the grant date and expire ten years after the grant date (or earlier in the case of certain terminations of employment). There were no stock options granted during the year ended December 31, 2023, no stock options granted during the year ended December 31, 2022 and 0.3 stock options granted during the year ended December 31, 2021.

The following table summarizes our stock option activity during 2023.

	Options	Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2023	0.3	$	23.30
Granted	0.0	0.0
Exercised	0.0	$	12.77
Stock options outstanding as of December 31, 2023	0.3	$	23.33	7.0	$	2.3

There were 0.0 stock options exercised in 2023 and there were 0.0 and 0.6 stock options exercised during 2022 and 2021, respectively. The total intrinsic value of stock options exercised during 2023, 2022 and 2021 was $0.0, $0.0 and $8.8, respectively. The cash received from the stock options exercised in 2023, 2022 and 2021 was $0.0, $0.0 and $12.2, which included taxes withheld of $0.0, $0.0, and $4.2, respectively.

Stock-Based Compensation

We grant other stock-based compensation awards such as stock-settled awards, cash-settled awards and performance-based awards (settled in cash or shares) to certain key employees. The number of shares or units received by an employee for performance-based awards depends on Company performance against specific performance targets and could range from 0% to 300% of the target amount of shares originally granted, except for Executive Officers of IPG, with a range of 0% to 200%. Incentive awards are subject to certain restrictions and vesting requirements as determined by the Compensation Committee. The fair value of the shares on the grant date is amortized over the vesting period, which is generally three years. Upon completion of the vesting period for cash-settled awards, the grantee is entitled to receive a payment in cash based on the fair market value of the corresponding number of shares of common stock. No monetary consideration is paid by a recipient for any incentive award. The fair value of cash-settled awards is adjusted each quarter based on our share price. The holders of certain stock-settled awards have the right to receive dividends. Dividends declared on common stock are accrued during the vesting period and paid when the award vests. The holders of performance-based awards have no ownership interest in the underlying shares of common stock until the awards vest and the shares of common stock are issued.

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2023 and 2022.

83

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

	Years ended December 31,
	2023		2022		2021
Stock-Settled Awards:
Awards granted	1.4		1.3		0.9
Weighted-average grant-date fair value (per award)	$	35.54	$	36.36	$	26.96
Total fair value of vested awards distributed	$	60.8	$	59.7	$	50.8
Cash-Settled Awards:
Awards granted	0.0		0.0		0.0
Weighted-average grant-date fair value (per award)	$	35.71	$	36.53	$	0.0
Total fair value of vested awards distributed	$	0.8	$	0.8	$	0.7
Performance-Based Awards:
Awards granted	2.1		1.6		0.5
Weighted-average grant-date fair value (per award)	$	26.31	$	29.95	$	21.98
Total fair value of vested awards distributed	$	84.8	$	54.5	$	39.3

In conjunction with common stock dividends declared in 2023 and 2022, we accrued dividends of $3.0 and $3.7, respectively, on non-vested stock-settled and cash-settled awards and paid dividends of $5.3 and $4.9 for stock-settled and cash-settled awards that vested during 2023 and 2022, respectively.

A summary of the activity of our non-vested stock-settled awards, cash-settled awards and performance-based awards during 2023 is presented below (performance-based awards are shown at 100% of the shares originally granted).

	Stock-Settled Awards				Cash-Settled Awards				Performance-Based Awards
	Awards		Weighted- Average Grant-Date Fair Value (per award)		Awards		Weighted- Average Grant-Date Fair Value (per award)		Awards		Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2023	3.5		$	27.52	0.0		$	27.96	2.9		$	24.31
Reinstated	0.1		29.25		0.0		0.0		0.0		33.26
Granted	1.4		35.54		0.0		35.71		2.1		26.31
Vested	(1.7)		21.92		0.0		21.02		(2.4)		18.03
Forfeited	(0.4)		31.04		0.0		34.96		(0.3)		27.82
Non-vested as of December 31, 2023	2.9		$	34.20	0.0		$	36.05	2.3		$	32.09
Total unrecognized compensation expense remaining	$	47.9			$	0.7			$	34.1
Weighted-average years expected to be recognized over	1.4				1.7				1.8

In conjunction with our annual grant of long-term incentive compensation awards, we reviewed our estimates and assumptions in 2023, which resulted in a forfeiture rate slightly less than prior years.

2020 Restricted Cash Plan

In November 2020, the Compensation Committee approved a new Interpublic Restricted Cash Plan, (collectively the “Cash Plans”). Under the Cash Plan, the Board, the Compensation Committee or the Plan Administrator may grant cash awards to certain employees eligible to receive cash-settled awards. Cash awards, when granted, have a service-period vesting condition and generally vest in two years or three years.

Cash Awards

During the years ended December 31, 2023, 2022 and 2021, the Compensation Committee granted cash awards under the Cash Plans with a total target value of $20.4, $19.9 and $85.8, respectively. For those same years, we recognized $31.5, $42.0 and $47.8, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

During the years ended December 31, 2023, 2022 and 2021, the Compensation Committee granted performance awards to be settled in cash under the 2019 PIP with a total target value of $46.2, $46.0, and $40.4, respectively. For those same years, we recognized $38.0, $44.7 and $52.1, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

84

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

We amortize the present value of the amount expected to vest for cash awards and performance cash awards over the vesting period using the straight-line method, less an assumed forfeiture rate. Cash awards do not fall within the scope of the authoritative guidance for stock compensation as they are not paid in equity and the value of the award is not correlated with our stock price. Due to the cash nature of the payouts and the vesting period, we account for these awards in accordance with authoritative guidance for deferred compensation arrangements.

Employee Stock Purchase Plans

In May 2016, our shareholders approved The Interpublic Group of Companies Employee Stock Purchase Plan (2016) (the “ESPP”), replacing the prior employee stock purchase plan under which, prior to its expiration on December 31, 2015, 3.0 shares were issued. Under the ESPP, eligible employees may purchase our common stock through payroll deductions not exceeding 10% of their eligible compensation or 900 (actual number) shares each offering period, consistent with the prior employee stock purchase plan. The price an employee pays for a share of common stock under the ESPP is 90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months. An aggregate of approximately 10.0 shares are reserved for issuance under the ESPP, of which 3.1 shares have been issued since the inception of the ESPP through December 31, 2023. During the year ended December 31, 2023, 0.6 shares with a value of $18.7 were issued under the ESPP.

Note 13:  Fair Value Measurements

Authoritative guidance for fair value measurements establishes a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:

Level 1	Unadjusted quoted prices in active markets for identical assets or liabilities. An active market for the asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
Level 2	Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Financial Instruments that are Measured at Fair Value on a Recurring Basis

We primarily apply the market approach to determine the fair value of financial instruments that are measured at fair value on a recurring basis. There were no changes to our valuation techniques used to determine the fair value of financial instruments during 2023 as compared to the prior year.

85

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

The following tables present information about our financial instruments measured at fair value on a recurring basis as of December 31, 2023 and 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2023								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	1,521.5	$	—	$	—	$	1,521.5	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	$	—	$	—	$	3.1	$	3.1	Accrued liabilities and Other non-current liabilities
	December 31, 2022								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	1,688.1	—		—		$	1,688.1	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	—		—		21.6		$	21.6	Accrued liabilities and Other non-current liabilities

1Contingent acquisition obligations includes deferred acquisition payments and unconditional obligations to purchase additional non-controlling equity shares of consolidated subsidiaries. Fair value measurement of the obligations is based upon actual and projected operating performance targets as specified in the related agreements. The decrease in this balance of $18.5 from December 31, 2022 to December 31, 2023 is primarily due to payments related to our deferred acquisitions from prior-year acquisitions and valuation adjustments, partially offset by the addition of a new contingent acquisition obligation and the exercises of redeemable non-controlling interest. The amounts payable within the next twelve months are classified in accrued liabilities; any amounts payable thereafter are classified in other non-current liabilities.

Financial Instruments that are not Measured at Fair Value on a Recurring Basis

The following table presents information about our financial instruments that are not measured at fair value on a recurring basis as of December 31, 2023, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2023								December 31, 2022
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Total long-term debt	$	—	$	2,974.5	$	0.8	$	2,975.3	$	—	$	2,551.5	$	0.8	$	2,552.3

Our long-term debt is comprised of senior notes and other notes payable. The fair value of our senior notes, which are traded over-the-counter, is based on quoted prices in markets that are not active. Therefore, these senior notes are classified as Level 2. Our other notes payable are not actively traded, and their fair value is not solely derived from readily observable inputs. The fair value of our other notes payable is determined based on a discounted cash flow model and other proprietary valuation methods, and therefore is classified as Level 3. See Note 4 for further information on our long-term debt.

The discount rates used as significant unobservable inputs in the Level 3 fair value measurements of our contingent acquisition obligations and long-term debt as of December 31, 2023 ranged from 3.0% to 6.0%.

Non-financial Instruments that are Measured at Fair Value on a Nonrecurring Basis

Certain non-financial assets and liabilities are measured at fair value on a nonrecurring basis, primarily goodwill (Level 3), intangible assets, and property and equipment. Accordingly, these assets are not measured and adjusted to fair value on an ongoing basis but are subject to periodic evaluations for potential impairment.

86

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 14:  Employee Benefits

Pension and Postretirement Benefit

We have a defined benefit pension plan covering certain U.S. employees (the “Domestic Pension Plan”) that consists of approximately 2,700 participants and is closed to new participants. We also have numerous funded and unfunded plans outside the U.S. The Interpublic Limited Pension Plan in the U.K. (the "U.K. Pension Plan") is a defined benefit plan and is our most material foreign pension plan in terms of the benefit obligation and plan assets. Some of our domestic and foreign subsidiaries provide postretirement health benefits and life insurance to eligible employees and, in certain cases, their dependents. The domestic postretirement benefit plan is our most material postretirement benefit plan in terms of the benefit obligation. This plan consists of approximately 1,400 participants, is closed to new participants and is unfunded.

Differences between the aggregate income statement and balance sheet amounts listed in the tables below and the totals reported in our Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income and Consolidated Balance Sheets relate to non-material foreign pension and postretirement benefit plans.

In December 2023, the U. K .Pension Plan entered into an agreement with an insurance company to purchase a group annuity, or "buy-in", that matches the plans future projected benefit obligations to covered participants. Prior to the transaction, the Company contributed an incremental $46.0 to the U.K. Pension Plan. As part of the annuity purchase contract, the U.K. Pension Plan has the option to complete a "buy-out", which would transfer all liabilities of the plan to the insurer, which the Company anticipates to be completed in the next 12-18 months. The non-cash settlement charge, net of tax, associated with the transaction is currently estimated to be approximately $180.0 to $200.0.

Pension and Postretirement Benefit Obligation

The change in the benefit obligation, the change in plan assets, the funded status and amounts recognized for the Domestic Pension Plan, the significant foreign pension plans and the domestic postretirement benefit plan are listed below.

	Domestic Pension Plan				Foreign Pension Plans				Domestic Postretirement Benefit Plan
	2023		2022		2023		2022		2023		2022
Benefit Obligation
Projected benefit obligation as of January 1	$	75.0	$	104.1	$	334.2	$	546.0	$	17.9	$	24.2
Service cost	0.0		0.0		2.2		4.6		0.0		0.0
Interest cost	4.0		2.8		15.6		8.9		0.9		0.6
Benefits paid	(8.2)		(9.0)		(18.9)		(20.9)		(5.1)		(4.8)
Plan participant contributions	0.0		0.0		0.0		0.0		1.8		1.9
Actuarial (gains) losses	1.0		(23.0)		6.8		(153.3)		0.6		(4.0)
Settlements	0.0		0.0		(2.5)		0.0		0.0		0.0
Plan amendments	0.0		0.1		0.0		0.0		0.0		0.0
Foreign currency effect	0.0		0.0		17.4		(51.1)		0.0		0.0
Projected benefit obligation as of December 31	$	71.8	$	75.0	$	354.8	$	334.2	$	16.1	$	17.9
Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	70.5	$	98.1	$	297.1	$	484.8	$	0.0	$	0.0
Actual return on plan assets	6.7		(18.6)		5.3		(134.8)		0.0		0.0
Employer contributions	0.0		0.0		61.4		16.4		3.3		2.9
Plan participant contributions	0.0		0.0		0.0		0.0		1.8		1.9
Benefits paid	(8.2)		(9.0)		(18.9)		(20.9)		(5.1)		(4.8)
Settlements	0.0		0.0		(2.5)		0.0		0.0		0.0
Foreign currency effect	0.0		0.0		17.3		(48.4)		0.0		0.0
Fair value of plan assets as of December 31	$	69.0	$	70.5	$	359.7	$	297.1	$	0.0	$	0.0
Funded status of the plans at December 31	$	(2.8)	$	(4.5)	$	4.9	$	(37.1)	$	(16.1)	$	(17.9)

87

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

	Domestic Pension Plan				Foreign Pension Plans				Domestic Postretirement Benefit Plan
December 31,	2023		2022		2023		2022		2023		2022
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0	$	0.0	$	59.8	$	17.8	$	0.0	$	0.0
Current liability	0.0		0.0		(7.0)		(5.1)		(1.9)		(2.0)
Non-current liability	(2.8)		(4.5)		(47.9)		(49.8)		(14.2)		(15.9)
Net liability recognized	$	(2.8)	$	(4.5)	$	4.9	$	(37.1)	$	(16.1)	$	(17.9)
Accumulated benefit obligation	$	71.8	$	75.0	$	351.2	$	328.2
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	$	41.1	$	44.4	$	157.7	$	134.6	$	1.7	$	1.1
Prior service cost (credit)	0.0		0.1		0.4		0.6		0.0		0.0
Total amount recognized	$	41.1	$	44.5	$	158.1	$	135.2	$	1.7	$	1.1

Actuarial losses of $1.0 for the Domestic Pension Plan are attributed to a decrease in the discount rate from 5.65% as of December 31, 2022 to 5.40% as of December 31, 2023 and changes in demographic experience. Actuarial losses of $6.8 for the foreign pension plans are attributed to a decrease in the weighted-average discount rate from 4.62% as of December 31, 2022 to 4.32% as of December 31, 2023 and changes in demographic experience.

	Domestic Pension Plan				Foreign Pension Plans
December 31,	2023		2022		2023		2022
Pension plans with an accumulated benefit obligation in excess of plan assets
Aggregate projected benefit obligation	$	71.8	$	75.0	$	55.8	$	67.4
Aggregate accumulated benefit obligation	71.8		75.0		53.7		62.4
Aggregate fair value of plan assets	69.0		70.5		1.0		12.5

	Domestic Pension Plan				Foreign Pension Plans
December 31,	2023		2022		2023		2022
Pension plans with a projected benefit obligation in excess of plan assets
Aggregate projected benefit obligation	$	71.8	$	75.0	$	66.0	$	67.4
Aggregate accumulated benefit obligation	71.8		75.0		63.5		62.4
Aggregate fair value of plan assets	69.0		70.5		11.1		12.5

88

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Net Periodic Cost

The components of net periodic benefit cost and key assumptions are listed below.

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Service cost	$	0.0	$	0.0	$	0.0	$	2.2	$	4.6	$	4.5	$	0.0	$	0.0	$	0.0
Interest cost	4.0		2.8		2.9		15.6		8.9		8.0		0.9		0.6		0.7
Expected return on plan assets	(4.0)		(4.7)		(5.6)		(17.0)		(19.8)		(20.8)		0.0		0.0		0.0
Curtailment and settlement	0.0		0.0		1.5		(0.3)		0.0		(0.9)		0.0		0.0		0.0
Amortization of:
Prior service cost (credit)	0.1		0.0		0.0		0.1		0.1		0.1		0.0		0.0		0.0
Net actuarial losses	1.6		1.4		1.7		5.0		4.4		6.7		0.0		0.4		0.9
Net periodic cost	$	1.7	$	(0.5)	$	0.5	$	5.6	$	(1.8)	$	(2.4)	$	0.9	$	1.0	$	1.6

Assumptions

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Net periodic cost
Discount rate	5.65	%	2.95	%	2.60	%	4.62	%	1.86	%	1.35	%	5.65	%	2.90	%	2.50	%
Rate of compensation increase	N/A		N/A		N/A		2.80	%	2.65	%	2.47	%	N/A		N/A		N/A
Expected return on plan assets	6.00	%	5.00	%	5.75	%	5.62	%	4.47	%	4.47	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Benefit obligation
Discount rate	5.40	%	5.65	%	2.95	%	4.32	%	4.62	%	1.86	%	5.40	%	5.65	%	2.90	%
Rate of compensation increase	N/A		N/A		N/A		3.35	%	2.80	%	2.65	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Healthcare cost trend rate assumed for next year
Initial rate (weighted-average)													6.50	%	6.75	%	6.50	%
Year ultimate rate is reached													2030		2030		2028
Ultimate rate													5.00	%	5.00	%	5.00	%

Discount Rates – At December 31, 2023, 2022 and 2021, we determined our discount rates for our domestic pension plan, foreign pension plans and domestic postretirement benefit plan based on either a bond selection/settlement approach or bond yield curve approach. Using the bond selection/settlement approach, we determine the discount rate by selecting a portfolio of corporate bonds appropriate to provide for the projected benefit payments. Using the bond yield curve approach, we determine the discount rate by matching the plans' cash flows to spot rates developed from a yield curve. Both approaches utilize high-quality AA-rated corporate bonds and the plans' projected cash flows to develop a discounted value of the benefit payments, which is then used to develop a single discount rate. In countries where markets for high-quality long-term AA corporate bonds are not well developed, a portfolio of long-term government bonds is used as a basis to develop hypothetical corporate bond yields, which serve as a basis to derive the discount rate.

Expected Return on Assets – Our expected rate of return is determined at the beginning of each year and considers asset class index returns over various market and economic conditions, current and expected market conditions, risk premiums associated with asset classes and long-term inflation rates. We determine both a short-term and long-term view and then select a long-term rate of return assumption that matches the duration of our liabilities.

89

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Fair Value of Pension Plan Assets

The following table presents the fair value of our domestic and foreign pension plan assets as of December 31, 2023 and 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. See Note 13 for a description of the fair value hierarchy.

	December 31, 2023								December 31, 2022
Plan assets subject to fair value hierarchy	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Registered investment companies	$	6.7	$	0.0	$	0.0	$	6.7	$	10.6	$	0.0	$	0.0	$	10.6
Limited partnerships	0.0		0.0		0.0		0.0		0.0		0.0		0.0		0.0
Fixed income securities	9.2		0.0		0.0		9.2		12.5		0.0		0.0		12.5
Insurance contracts	0.0		1.4		334.4		335.8		0.0		1.6		0.0		1.6
Other	10.7		0.0		0.0		10.7		11.9		0.0		0.0		11.9
Total plan assets, subject to leveling	$	26.6	$	1.4	$	334.4	$	362.4	$	35.0	$	1.6	$	—	$	36.6
Other Plan Assets
Other investments measured at net asset value 1							106.5								331.0
Non-benefit obligation liabilities							(40.2)								0.0
Total plan assets							$	428.7							$	367.6

1Certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy but are included to reconcile to the amounts presented in the fair value of plan assets table above.

Registered investment companies, which are publicly traded, are primarily valued using recently reported sales prices. Limited partnerships are invested primarily in equity and fixed income securities. Fixed income securities include government and investment-grade corporate bonds. Insurance contracts are valued based on the cash surrender value of the contract. Other investments primarily include cash and cash equivalents, equity securities and derivatives. Other investments measured at net asset value include common/collective trusts, hedge funds and other commingled assets that are invested primarily in equity and fixed income securities. These investments are not publicly traded and are valued based on the net asset value of shares held by the plan at year end, which reflects the fair value of the underlying investments.

The following table presents additional information about our significant foreign pension plan assets for which we utilize Level 3 inputs to determine fair value.

	Years ended December 31,
Plan assets subject to fair value hierarchy, Level 3	2023		2022
Balance at beginning of period	$	0.0	$	24.0
Actual return on plan assets	19.9		(1.7)
Net purchases, sales and settlements	314.5		(22.3)
Balance at end of period	$	334.4	$	0.0

90

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Asset Allocation

The primary investment goal for our plans’ assets is to maximize total asset returns while ensuring the plans’ assets are available to fund the plans’ liabilities as they become due. The plans’ assets in aggregate and at the individual portfolio level are invested so that total portfolio risk exposure and risk-adjusted returns best achieve this objective. The aggregate amount of our own stock held as investment for our domestic and foreign pension funds is considered negligible relative to the total fund assets. As of December 31, 2023, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.

			December 31,
Asset Class	2024 Target Allocation		2023		2022
Alternative investments 1	—	%	—	%	18	%
Equity securities	6	%	5	%	14	%
Fixed income securities	15	%	16	%	26	%
Insurance contracts	78	%	78	%	—	%
Liability driven investments 2	—	%	—	%	28	%
Real estate & Other	1	%	1	%	14	%
Total	100	%	100	%	100	%

1Alternative investments have the flexibility to dynamically invest across a broad range of asset classes including bonds, equity, cash, property and commodities.

2Liability driven investment strategies use government bonds as well as derivative instruments to hedge a portion of the impact of interest rates and inflation movements on the long-term liabilities.

Cash Flows

During 2023, we contributed $0.0 and $61.4 of cash to our domestic and foreign pension plans, respectively. For 2024, we expect to contribute approximately $0.0 and $10.0 of cash to our domestic and foreign pension plans, respectively.

The estimated future benefit payments expected to be paid are presented below.

Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2024	$	8.0	$	22.6	$	1.6
2025	7.2		22.0		1.5
2026	6.9		21.6		1.4
2027	6.9		21.1		1.7
2028	6.4		21.6		1.6
2029 - 2033	27.4		108.4		6.3

The estimated future payments for our domestic postretirement benefit plan are net of any estimated U.S. federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003, which total no more than $0.2 in any individual year.

Savings Plans

We sponsor defined contribution plans (the “Savings Plans”) that cover substantially all domestic employees. The Savings Plans permit participants to make contributions on a pre-tax and/or after-tax basis and allow participants to choose among various investment alternatives. We match a portion of participant contributions based upon their years of service. Amounts expensed for the Savings Plans for 2023, 2022 and 2021 were $62.8, $77.5 and $65.1, respectively. Expenses include a discretionary Company contribution of $0.0, $9.3 and $8.0 offset by participant forfeitures of $5.8, $6.3 and $8.5 in 2023, 2022 and 2021, respectively. In addition, we maintain defined contribution plans in various foreign countries and contributed $62.5, $58.2 and $59.7 to these plans in 2023, 2022 and 2021, respectively.

Deferred Compensation and Benefit Arrangements

We have deferred compensation and benefit arrangements which (i) permit certain of our key officers and employees to defer a portion of their salary or incentive compensation or (ii) require us to contribute an amount to the participant’s account. These arrangements may provide participants with the amounts deferred plus interest upon attaining certain conditions, such as

91

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

completing a certain number of years of service, attaining a certain age or upon retirement or termination. As of December 31, 2023 and 2022, the deferred compensation and deferred benefit liability balance was $126.5 and $141.1, respectively. Amounts expensed for deferred compensation and benefit arrangements in 2023, 2022 and 2021 were $10.7, $2.1 and $8.8, respectively.

We have purchased life insurance policies on participants' lives to assist in the funding of the related deferred compensation and deferred benefit liabilities. As of December 31, 2023 and 2022, the cash surrender value of these policies was $164.7 and $161.2, respectively.

Long-Term Disability Plan

We have a long-term disability plan which provides income replacement benefits to eligible participants who are unable to perform their job duties or any job related to his or her education, training or experience. As all income replacement benefits are fully insured, no related obligation is required as of December 31, 2023 and 2022. In addition to income replacement benefits, plan participants may remain covered for certain health and life insurance benefits up to normal retirement age, and accordingly, we have recorded an obligation of $5.3 and $5.4 as of December 31, 2023 and 2022, respectively.

92

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 15:  Segment Information

As of December 31, 2023, we have three reportable segments: MD&E, IA&C and SC&E. We also report results for the "Corporate and other" group.

The MD&E segment provides, and is distinguished by innovative capabilities and scale in, global media and communications services, digital services and products, advertising and marketing technology, e‐commerce services, data management and analytics, strategic consulting, and digital brand experience. MD&E is comprised of IPG Mediabrands and Acxiom, as well as our digital and commerce specialist agencies, which include MRM, R/GA, and Huge.

The IA&C segment provides advertising, corporate and brand identity services, and strategic consulting. IA&C is distinguished by the leading role of complex integrations of ideation and the execution of advertising and creative campaigns across all communications channels that are foundational to client brand identities. IA&C is comprised of leading global networks and agencies that provide a broad range of services, including McCann Worldgroup, IPG Health, MullenLowe Group, Foote, Cone & Belding ("FCB"), and our domestic integrated agencies.

The SC&E segment provides best-in-class global public relations and other specialized communications services, events, sports and entertainment marketing, and strategic consulting. SC&E is comprised of agencies that provide a range of marketing services expertise, including Weber Shandwick, Golin, our sports, entertainment, and experiential agencies and IPG DXTRA Health.

All segments follow the same accounting policies as those described in Note 1.

Corporate and other is primarily comprised of selling, general and administrative expenses. Selling, general and administrative expenses includes corporate office expenses as well as shared service center and certain other centrally managed expenses that are not fully allocated to operating divisions; salaries, long-term incentives, annual bonuses and other miscellaneous benefits for corporate office employees; professional fees related to internal control compliance, financial statement audits and legal, information technology and other consulting services that are engaged and managed through the corporate office; and rental expense for properties occupied by corporate office employees. A portion of centrally managed expenses is allocated to operating divisions based on a formula that uses the planned revenues of each of the operating units. Amounts allocated also include specific charges for information technology-related projects, which are allocated based on utilization.

Certain prior period amounts, wherever applicable, have been recast to reflect the transfer of certain agencies between our reportable segments.

93

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Summarized financial information concerning our reportable segments is shown in the following tables.

	Years ended December 31,
	2023		2022		2021
Total Revenue:
MD&E	$	4,394.8	$	4,381.6	$	4,196.6
IA&C	4,002.2		4,140.6		4,041.8
SC&E	2,492.3		2,405.6		2,002.3
Total	$	10,889.3	$	10,927.8	$	10,240.7
Revenue before billable expenses:
MD&E	$	4,326.5	$	4,296.9	$	4,117.7
IA&C	3,633.2		3,766.3		3,679.7
SC&E	1,440.9		1,386.2		1,310.5
Total	$	9,400.6	$	9,449.4	$	9,107.9
Restructuring:
MD&E	(1.3)		69.1		0.1
IA&C	0.2		28.7		2.6
SC&E	1.1		3.8		10.0
Corporate and other	0.1		0.8		(2.1)
Total	$	0.1	$	102.4	$	10.6
Segment EBITA1:
MD&E	$	832.4	$	744.5	$	865.3
IA&C	541.3		581.4		597.9
SC&E	265.2		234.5		188.6
Corporate and other	(72.3)		(94.5)		(129.4)
Total	$	1,566.6	$	1,465.9	$	1,522.4
Amortization of acquired intangibles:
MD&E	$	77.3	$	72.8	$	71.9
IA&C	4.3		7.2		10.4
SC&E	2.4		4.7		3.9
Corporate and other	0.0		0.0		0.0
Total	$	84.0	$	84.7	$	86.2
Depreciation and amortization2:
MD&E	$	105.8	$	107.4	$	108.0
IA&C	53.6		58.4		62.7
SC&E	15.9		16.9		17.7
Corporate and other	5.0		6.6		9.2
Total	$	180.3	$	189.3	$	197.6
Capital expenditures:
MD&E	$	100.1	$	97.4	$	99.7
IA&C	40.8		43.8		57.5
SC&E	6.4		7.3		8.1
Corporate and other	32.0		29.6		30.0
Total	$	179.3	$	178.1	$	195.3

1 Segment EBITA is calculated as net income available to IPG common stockholders before provision for income taxes, total (expenses) and other income, equity in net income of unconsolidated affiliates, net income attributable to non-controlling interests and amortization of acquired intangibles.

2 Excludes amortization of acquired intangibles.

94

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

	December 31,
	2023		2022
Total assets:
MD&E	$	10,715.4	$	9,984.3
IA&C	4,812.5		5,083.5
SC&E	1,800.6		1,629.9
Corporate and other	1,938.8		2,114.0
Total	$	19,267.3	$	18,811.7

The following table presents the reconciliation of segment EBITA to Income before income taxes.

	Years ended December 31,
	2023		2022		2021
MD&E EBITA	$	832.4	$	744.5	$	865.3
IA&C EBITA	541.3		581.4		597.9
SC&E EBITA	265.2		234.5		188.6
Corporate and other EBITA	(72.3)		(94.5)		(129.4)
Less: consolidated amortization of acquired intangibles	84.0		84.7		86.2
Operating income	1,482.6		1,381.2		1,436.2
Total (expenses) and other income	(74.6)		(112.3)		(214.1)
Income before income taxes	$	1,408.0	$	1,268.9	$	1,222.1

Long-lived assets, including operating lease right-of-use assets and excluding intangible assets, are presented by major geographic area in the following table.

	Long-Lived Assets
	December 31,
	2023		2022
Domestic	$	1,546.0	$	1,676.7
International:
United Kingdom	290.1		254.8
Continental Europe	84.7		87.6
Asia Pacific	163.2		176.5
Latin America	59.0		61.6
Other	84.3		88.9
Total International	681.3		669.4
Total Consolidated	$	2,227.3	$	2,346.1

Property and equipment are allocated based upon physical location. Other assets and investments are allocated based on the location of the related operations.

Note 16:  Commitments and Contingencies

Guarantees

We have guaranteed certain obligations of our subsidiaries relating principally to operating leases and uncommitted lines of credit of certain subsidiaries. As of December 31, 2023 and December 31, 2022, the amount of parent company guarantees on lease obligations was $678.1 and $797.3, respectively, the amount of parent company guarantees primarily relating to uncommitted lines of credit was $255.7 and $276.4, respectively, and the amount of parent company guarantees related to daylight overdrafts, primarily utilized to manage intra-day overdrafts due to timing of transactions under cash pooling arrangements without resulting in incremental borrowings, was $85.5 and $101.3, respectively. In the event of non-payment by the applicable subsidiary of the obligations covered by a guarantee, we would be obligated to pay the amounts covered by that guarantee. As of both December 31, 2023 and December 31, 2022, there were no material assets pledged as security for such parent company guarantees.

95

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2023.

	2024		2025		2026		2027		2028		Thereafter		Total
Deferred acquisition payments	$	2.9	$	0.1	$	0.1	$	0.0	$	0.0	$	0.0	$	3.1
Redeemable non-controlling interests and call options with affiliates 1	9.7		17.4		19.9		28.7		0.0		0.0		75.7
Total contingent acquisition payments	$	12.6	$	17.5	$	20.0	$	28.7	$	0.0	$	0.0	$	78.8

1We have entered into certain acquisitions that contain both redeemable non-controlling interests and call options with similar terms and conditions. The estimated amounts listed would be paid in the event of exercise at the earliest exercise date. We have certain redeemable non-controlling interests that are exercisable at the discretion of the non-controlling equity owners as of December 31, 2023. These estimated payments of $1.4 are included within the total payments expected to be made in 2024, and will continue to be carried forward into 2025 or beyond until exercised or expired. Redeemable non-controlling interests are included in the table at current exercise price payable in cash, not at applicable redemption value, in accordance with the authoritative guidance for classification and measurement of redeemable securities.

The majority of these payments are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revision in accordance with the terms of the respective agreements. See Note 6 for further information relating to the payment structure of our acquisitions.

Legal Matters

We are involved in various legal proceedings, and subject to investigations, inspections, audits, inquiries and similar actions by governmental authorities arising in the normal course of business. The types of allegations that arise in connection with such legal proceedings vary in nature, but can include claims related to contract, employment, tax and intellectual property matters. We evaluate all cases each reporting period and record liabilities for losses from legal proceedings when we determine that it is probable that the outcome in a legal proceeding will be unfavorable and the amount, or potential range, of loss can be reasonably estimated. In certain cases, we cannot reasonably estimate the potential loss because, for example, the litigation is in its early stages. While any outcome related to litigation or such governmental proceedings in which we are involved cannot be predicted with certainty, management believes that the outcome of these matters, individually and in the aggregate, will not have a material adverse effect on our financial condition, results of operations or cash flows.

Note 17:  Recent Accounting Standards

Accounting pronouncements not listed below were assessed and determined to be not applicable or are expected to have minimal impact on our Consolidated Financial Statements.

Income Taxes

In December 2023, the Financial Accounting Standards Board issued amended guidance to enhance the transparency and decision usefulness of income tax disclosures by requiring disaggregated information about an entity's effective tax rate reconciliation, as well as information on taxes paid. This amended guidance is effective for annual periods beginning after December 15, 2024. We are currently evaluating the impact on our Consolidated Financial Statements.

Segment Reporting

In November 2023, the Financial Accounting Standards Board issued amended guidance on segment reporting to improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analysis. This amended guidance is effective for annual periods beginning after December 15, 2023 and interim periods beginning after December 15, 2024. We are currently evaluating the impact on our Consolidated Financial Statements.

Derivatives and Hedging

In March 2022, the Financial Accounting Standards Board issued amended guidance on hedge accounting which allows nonprepayable financial assets to be included in a closed portfolio hedge using the portfolio layer method, allowing for more consistent accounting over prepayable and nonprepayable hedges. The new guidance also allows multiple hedged layers to be designated for a single closed portfolio, further aligning hedge accounting with risk management strategies. We adopted the standard January 1, 2023, which did not have a significant impact on our Consolidated Financial Statements.

96

Notes to Consolidated Financial Statements

(Amounts in Millions, Except Per Share Amounts)

Note 18:  Subsequent Events

We announced on February 8, 2024 that our Board had declared a common stock cash dividend of $0.330 per share, payable on March 15, 2024 to holders of record as of the close of business on March 1, 2024.

97

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Evaluation of disclosure controls and procedures

In connection with the preparation of this Annual Report on Form 10-K for the year ended December 31, 2023, we have carried out an evaluation under the supervision of, and with the participation of, our management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). Based on this evaluation, our Chief Executive Officer and Chief Financial Officer have concluded (1) that the disclosure controls and procedures were effective as of December 31, 2023 to provide reasonable assurance that information required to be disclosed in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and (2) that the disclosure controls and procedures were effective as of December 31, 2023 to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including the principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives.

Management’s report on internal control over financial reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Management (with the participation of our Chief Executive Officer and Chief Financial Officer) conducted an evaluation of the effectiveness of internal control over financial reporting based on the framework in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this evaluation, management concluded that IPG’s internal control over financial reporting was effective as of December 31, 2023. PricewaterhouseCoopers LLP, an independent registered public accounting firm, has audited the effectiveness of IPG’s internal control over financial reporting as of December 31, 2023, as stated in their report which appears in this Annual Report on Form 10-K.

Changes in internal control over financial reporting

There has been no change in internal control over financial reporting in the quarter ended December 31, 2023 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Item 9B. Other Information

None.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

98

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information required by this Item is incorporated by reference to the “Election of Directors," "Corporate Governance Principles and Practices," "Meetings and Committees of the Board," and "Delinquent Section 16(a) Reports" sections of the Proxy Statement for the Annual Meeting of Stockholders to be held on May 23, 2024 (the “Proxy Statement”), except for the description of our Executive Officers, which appears in Part I of this Report on Form 10-K under the heading “Executive Officers of IPG.”

New York Stock Exchange Certification

In 2023, our Chief Executive Officer provided the Annual CEO Certification to the New York Stock Exchange, as required under Section 303A.12(a) of the New York Stock Exchange Listed Company Manual.

Item 11. Executive Compensation

The information required by this Item is incorporated by reference to the “Summary Compensation Table," "Grants of Plan-Based Awards," "Outstanding Equity Awards at Fiscal Year-End," "Option Exercises and Stock Vested," "Pension Arrangements," Nonqualified Deferred Compensation Arrangements," "Employment Agreements, Termination of Employment and Change of Control Arrangements," "Severance and Change of Control Benefits," "Keys to Termination of Employment and Change of Control Payments," "Estimated Termination of Employment and Change of Control Payments," "CEO Pay Ratio," "Pay versus Performance," "Compensation Discussion and Analysis," "Compensation and Leadership Talent Committee Report," and "Non-Management Director Compensation," sections of the Proxy Statement.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required by this Item is incorporated by reference to the “Outstanding Shares and Ownership of Common Stock” section of the Proxy Statement, except for information regarding the shares of common stock to be issued or which may be issued under our equity compensation plans as of December 31, 2023, which is provided in the following table.

Plan Category	Number of Shares of Common Stock to be Issued Upon Exercise of Outstanding Options, Warrants and Rights (a) 1, 2, 3, 4	Weighted-Average Exercise Price of Outstanding Stock Options (b)		Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (Excluding Securities Reflected in Column (a)) (c) 5
Equity Compensation Plans Approved by Security Holders	5,476,240	$	23.33	29,693,231

1Included a total of 250,000 outstanding stock options granted under the 2009 Performance Incentive Plan (the “2009 Plan"). These options are the only instruments taken into account in computing the weighted-average exercise price in column (b) of this table.

2Included a total of 2,346,671 shares of Common Stock representing the target number of shares issuable under the 2019 Performance Incentive Plan following the completion of the 2021-2023 performance period, the 2022-2024 performance period and the 2023-2025 performance period, respectively.

3Included a total of 2,822,958 shares of Common Stock issuable pursuant to restricted share unit awards granted under the 2019 Plan, which are settled in shares of Common Stock.

4Included a total of 56,611 shares of Common Stock issuable pursuant to restricted share awards granted under the 2019 Plan.

5Included (i) 22,833,562 shares of Common Stock available for issuance under the shares of Common Stock available for issuance under the 2019 Performance Incentive Plan and (ii) 6,859,669 shares of Common Stock available for issuance under the Employee Stock Purchase Plan (2016).

Item 13. Certain Relationships and Related Transactions, and Director Independence

The information required by this Item is incorporated by reference to the “Transactions with Related Persons” section and the “Director Independence” section of the Proxy Statement.

Item 14. Principal Accountant Fees and Services

The information required by this Item is incorporated by reference to the “Appointment of Registered Public Accounting Firm” section of the Proxy Statement.

99

PART IV

Item 15. Exhibits, Financial Statement Schedules

(a) Listed below are all financial statements, financial statement schedules and exhibits filed as part of this Report on Form 10-K.

1. Financial Statements:

Report of Independent Registered Public Accounting Firm

Consolidated Statements of Operations for the years ended December 31, 2023, 2022 and 2021

Consolidated Statements of Comprehensive Income for the years ended December 31, 2023, 2022 and 2021

Consolidated Balance Sheets as of December 31, 2023 and 2022

Consolidated Statements of Cash Flows for the years ended December 31, 2023, 2022 and 2021

Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2023, 2022 and 2021

Notes to Consolidated Financial Statements

2. Financial Statement Schedules:

All financial statement schedules are omitted because they are either not applicable or the required information is otherwise provided.

3. Exhibits:

All exhibits, including management contracts and compensatory plans or arrangements, required pursuant to Item 601 of Regulation S-K to be filed as part of this report or incorporated herein by reference to other documents, are listed in the Exhibit Index of this Report on Form 10-K. The agreements and other documents filed as exhibits to this report are not intended to provide factual information or other disclosure other than with respect to the terms of the agreements or other documents themselves, and you should not rely on them for that purpose. In particular, any representations and warranties made by us in these agreements or other documents were made solely within the specific context of the relevant agreement or document and may not describe the actual state of affairs as of the date they were made or at any other time.

Item 16. Form 10-K Summary

None.

100

EXHIBIT INDEX

Exhibit No.	Description
3(i)	Restated Certificate of Incorporation of the Registrant dated as of October 24, 2013, is incorporated by reference to Exhibit 3(i)(2) to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2013.
3(ii)	Amended and Restated By-Laws of the Registrant dated as of October 26, 2016, is incorporated by reference to Exhibit 3(ii) to the Registrant’s Current Report on Form 8-K filed with the SEC on October 27, 2016.
4(iii)(A)	Senior Debt Indenture dated as of March 2, 2012 (the "2012 Indenture"), between the Registrant and U.S. Bank National Association, as Trustee, is incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed with the SEC on March 2, 2012.
4(iii)(B)	Fourth Supplemental Indenture, dated as of April 3, 2014, to the 2012 Indenture, with respect to the 4.200% Senior Notes due 2024 is incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on April 3, 2014.
4(iii)(C)	Seventh Supplemental Indenture, dated as of September 21, 2018, to the 2012 Indenture, with respect to the 4.650% Senior Notes due 2028 is incorporated by reference to Exhibit 4.4 to the Registrant’s Current Report on Form 8-K filed with the SEC on September 21, 2018.
4(iii)(D)	Eighth Supplemental Indenture, dated as of September 21, 2018, to the 2012 Indenture, with respect to the 5.400% Senior Notes due 2048 is incorporated by reference to Exhibit 4.5 to the Registrant’s Current Report on Form 8-K filed with the SEC on September 21, 2018.
4(iii)(E)	Ninth Supplemental Indenture, dated as of March 30, 2020, to the 2012 Indenture, with respect to the 4.750% Senior Notes due 2030 is incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on March 30, 2020.
4(iii)(F)	Tenth Supplemental Indenture, dated as of February 25, 2021, to the 2012 Indenture, with respect to the 2.400% Senior Notes due 2031 is incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 25, 2021.
4(iii)(G)	Eleventh Supplemental Indenture, dated as of February 25, 2021, to the 2012 Indenture, with respect to the 3.375% Senior Notes due 2041 is incorporated by reference to Exhibit 4.3 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 25, 2021.
4(vi)	Description of Registered Securities is incorporated by reference to Exhibit 4(vi) to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2019.
10(i)(A)	Amended and Restated Credit Agreement, dated as of November 1, 2021, among The Interpublic Group of Companies, Inc., the lenders named therein and Citibank, N.A., as administrative agent is incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on November 4, 2021.
(i) Philippe Krakowsky
10(iii)(A)(1)	Employment Agreement, made as of January 1, 2021, entered into on July 22, 2021, by and between the Registrant and Philippe Krakowsky, is incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2021.*
10(iii)(A)(2)	Executive Special Benefits Agreement, dated as of February 1, 2002, and signed as of August 21, 2002, between the Registrant and Philippe Krakowsky, is incorporated by reference to Exhibit 10(iii)(A)(v) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2002.*
10(iii)(A)(3)	Executive Change of Control Agreement, effective as of May 27, 2010, by and between the Registrant and Philippe Krakowsky, is incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed with the SEC on May 27, 2010.*
10(iii)(A)(4)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Philippe Krakowsky, dated August 29, 2013 is incorporated by reference to Exhibit 10.5 to the Registrant's Current Report on Form 8-K filed with the SEC on August 30, 2013.*
10(iii)(A)(5)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Philippe Krakowsky, dated October 26, 2016 is incorporated by reference to Exhibit 10(iii)(a)(5) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2016.*
10(iii)(A)(6)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Philippe Krakowsky, dated July 24, 2019 is incorporated by reference to Exhibit 10(iii)(a)(5) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019.*

101

10(iii)(A)(7)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Philippe Krakowsky, dated October 26, 2022 is incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2022.*
(iii) Ellen Johnson
10(iii)(A)(8)	Employment Agreement between the Registrant and Ellen Johnson made as of January 1, 2020, entered into on July 29, 2020 is incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020.*
10(iii)(A)(9)	Executive Change of Control Agreement between the Registrant and Ellen Johnson dated as of May 27, 2010, is incorporated by reference to Exhibit 10(iii)(A)(4) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2019.*
10(iii)(A)(10)	Extension of Existing Executive Change of Control Agreement between the Registrant and Ellen Johnson dated August 29, 2013, is incorporated by reference to Exhibit 10(iii)(A)(5) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2019.*
10(iii)(A)(11)	Extension of Existing Executive Change of Control Agreement between the Registrant and Ellen Johnson dated October 26, 2016, is incorporated by reference to Exhibit 10(iii)(A)(6) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2019.*
10(iii)(A)(12)	Extension of Existing Executive Change of Control Agreement between the Registrant and Ellen Johnson dated July 24, 2019 is incorporated by reference to Exhibit 10(iii)(a)(6) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019.*
10(iii)(A)(13)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Ellen Johnson, dated October 26, 2022 is incorporated by reference to Exhibit 10.2 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2022.*
(iv) Andrew Bonzani
10(iii)(A)(14)	Employment Agreement, effective as of December 22, 2011, by and between the Registrant and Andrew Bonzani, is incorporated by reference to Exhibit(iii)(A)(8) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2012.*
10(iii)(A)(15)	Executive Change of Control Agreement, effective as of December 22, 2011, by and between the Registrant and Andrew Bonzani, is incorporated by reference to Exhibit(iii)(A)(9) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2012.*
10(iii)(A)(16)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Andrew Bonzani, dated August 29, 2013 is incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed with the SEC on August 30, 2013.*
10(iii)(A)(17)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Andrew Bonzani, dated October 26, 2016 is incorporated by reference to Exhibit 10(iii)(a)(3) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2016.*
10(iii)(A)(18)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Andrew Bonzani, dated July 24, 2019 is incorporated by reference to Exhibit 10(iii)(a)(3) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019.*
10(iii)(A)(19)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Andrew Bonzani, dated October 26, 2022 is incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2022.*
(v) Christopher Carroll
10(iii)(A)(20)	Employment Agreement, made as of April 1, 2006, by and between the Registrant and Christopher Carroll, is incorporated by reference to Exhibit 10(iii)(A)(8) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2011.*
10(iii)(A)(21)	Amendment, dated as of October 29, 2007, to an Employment Agreement, made as of April 1, 2006, between the Registrant and Christopher Carroll, is incorporated by reference to Exhibit 10(iii)(A)(9) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2011.*
10(iii)(A)(22)	Executive Change of Control Agreement, effective as of May 27, 2010, by and between the Registrant and Christopher Carroll, is incorporated by reference to Exhibit 10(iii)(A)(10) to the Registrant's Annual Report on Form 10-K for the year ended December 31, 2011.*

102

10(iii)(A)(23)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Christopher Carroll, dated August 29, 2013 is incorporated by reference to Exhibit 10.4 to the Registrant's Current Report on Form 8-K filed with the SEC on August 30, 2013.*
10(iii)(A)(24)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Christopher Carroll, dated October 26, 2016 is incorporated by reference to Exhibit 10(iii)(a)(4) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2016.*
10(iii)(A)(25)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Christopher Carroll, dated July 24, 2019 is incorporated by reference to Exhibit 10(iii)(a)(4) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019.*
10(iii)(A)(26)	Extension of Existing Executive Change of Control Agreement by and between the Registrant and Christopher Carroll, dated October 26, 2022 is incorporated by reference to Exhibit 10.4 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2022.*
Compensation Plans and Arrangements:
10(iii)(A)(27)	The Interpublic Group 2019 Performance Incentive Plan (the “2019 PIP”) is incorporated by reference to Exhibit 10(iii)(A)(62) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(28)	2019 PIP Restricted Stock Award Agreement is incorporated by reference to Exhibit 10(iii)(A)(63) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(29)	2019 PIP Restricted Stock Unit Award Agreement is incorporated by reference to Exhibit 10(iii)(A)(64) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(30)	2019 PIP Restricted Stock Unit Award Agreement.* (updated 2021) is incorporated by reference to Exhibit 10(iii)(A)(50) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020*.
10(iii)(A)(31)	2019 PIP Restricted Stock Unit Award Agreement (version2) is incorporated by reference to Exhibit 10(iii)(A)(65) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(32)	2019 PIP Performance Share Award Agreement is incorporated by reference to Exhibit 10(iii)(A)(66) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(33)	2019 PIP Performance Share Award Agreement (updated 2021) is incorporated by reference to Exhibit 10(iii)(A)(53) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020.*
10(iii)(A)(34)	2019 PIP Performance Share Award Agreement (version 2) is incorporated by reference to Exhibit 10(iii)(A)(67) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(35)	2019 PIP Performance Cash Award Agreement is incorporated by reference to Exhibit 10(iii)(A)(68) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(36)	2019 PIP Performance Cash Award Agreement (updated 2021) is incorporated by reference to Exhibit 10(iii)(A)(56) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020*.
10(iii)(A)(37)	2019 PIP Performance Cash Award Agreement (version 2) is incorporated by reference to Exhibit 10(iii)(A)(69) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2019.*
10(iii)(A)(38)	2019 PIP Stock Option Award Agreement is incorporated by reference to Exhibit 10(iii)(A)(58) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020.*
10(iii)(A)(39)	The Interpublic Restricted Cash Plan, Restatement effective as of November 12, 2020 is incorporated by reference to Exhibit 10(iii)(A)(61) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020.*
10(iii)(A)(40)	Restricted Cash Award Agreement is incorporated by reference to Exhibit 10(iii)(A)(62) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2020.*
10(iii)(A)(41)	The Interpublic Senior Executive Incentive Plan is incorporated by reference to Exhibit 10(iii)(a)(7) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2019.*

103

10(iii)(A)(42)	Amended and Restated Employee Stock Purchase Plan (2016) of the Registrant is incorporated by reference to Exhibit 10.1 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2020.*
10(iii)(A)(43)	The Interpublic Group Executive Performance (162(m) Plan) is incorporated by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed with the SEC on May 28, 2014.*
10(iii)(A)(44)	The Interpublic Executive Severance Plan, amended and restated, effective August 16, 2017, is incorporated by reference to Exhibit 10(iii)(A)(1) to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2017.*
10(iii)(A)(45)	The Interpublic Capital Accumulation Plan, Amended and Restated (the “Restated CAP”), effective January 1, 2007, is incorporated by reference to Exhibit 10(iii)(A)(4) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2007.*
10(iii)(A)(46)	Restated CAP - Form of Restated Participation Agreement is incorporated by reference to Exhibit 10(iii)(A)(5) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2007.*
10(iii)(A)(47)	Restated CAP - Form of Participation Agreement (Form For New Participants), is incorporated by reference to Exhibit 10(iii)(A)(6) to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 2007.*
10(iii)(A)(48)	The Interpublic Capital Accumulation Plan, amended and restated, effective August 1, 2014, and form of Participation Agreement for New Participants is incorporated by reference to Exhibit 10(iii)(A)(1) to the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014.*
10(iii)(A)(49)	Description of Changes to the Compensation for Non-Management Directors is incorporated by reference to Exhibit 10(iii)(a)(71) to the Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2021.*
21	Subsidiaries of the Registrant.
23	Consent of PricewaterhouseCoopers LLP.
24	Power of Attorney to sign Form 10-K and resolution of Board of Directors re Power of Attorney.
31.1	Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended.
31.2	Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended.
32	Certification of the Chief Executive Officer and the Chief Financial Officer furnished pursuant to 18 U.S.C. Section 1350 and Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended.
97	The Interpublic Group of Companies, Inc. Dodd-Frank Clawback Policy
101	Interactive Data File, for the period ended December 31, 2023. The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
104	Cover Page Interactive Data File. The cover page XBRL tags are embedded within the inline XBRL document and are included in Exhibit 101.

104

SIGNATURES

Pursuant to the requirements of Section 13 of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

THE INTERPUBLIC GROUP OF COMPANIES, INC.
(Registrant)
By	/s/ Philippe Krakowsky
	Philippe Krakowsky Chief Executive Officer

Date: February 20, 2024

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Name	Title	Date
/s/ Philippe Krakowsky	Chief Executive Officer and Director (Principal Executive Officer)	February 20, 2024
Philippe Krakowsky
/s/ Ellen Johnson	Executive Vice President and Chief Financial Officer (Principal Financial Officer)	February 20, 2024
Ellen Johnson
/s/ Christopher F. Carroll	Senior Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer)	February 20, 2024
Christopher F. Carroll
/s/ Jorge Benitez	Director	February 20, 2024
Jorge Benitez
/s/ Jocelyn Carter-Miller	Director	February 20, 2024
Jocelyn Carter-Miller
/s/ Mary J. Steele Guilfoile	Director	February 20, 2024
Mary J. Steele Guilfoile
/s/ Dawn Hudson	Director	February 20, 2024
Dawn Hudson
/s/ Jonathan F. Miller	Director	February 20, 2024
Jonathan F. Miller
/s/ Patrick Q. Moore	Director	February 20, 2024
Patrick Q. Moore
/s/ Linda S. Sanford	Director	February 20, 2024
Linda Sanford
/s/ David M. Thomas	Director	February 20, 2024
David M. Thomas
/s/ E. Lee Wyatt Jr.	Director	February 20, 2024
E. Lee Wyatt Jr.

105

EX-21

EXHIBIT 21

The Interpublic Group of Companies, Inc.

Our principal subsidiaries as of December 31, 2023 are listed below. All other subsidiaries, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary under Rule 1-02(w) of Regulation S-X.

Company Name	State (U.S.)
Acxiom LLC	Delaware
Business Science Research Corporation	Delaware
Carmichael Lynch, Inc.	Minnesota
Chase Design Holdings, LLC	Delaware
DeVries Public Relations, Ltd.	New York
FCBCure, LLC	New Jersey
Genuine Interactive, LLC	Massachusetts
Gillespie, LLC	Delaware
Huge, LLC	New York
Independent Advertising, LLC	Delaware
IPG Asia & Oceania LLC	Delaware
IPG Health, LLC	Delaware
Lowe & Partners Worldwide Inc.	Delaware
Lowe Group Holdings, Inc.	New York
Mediahub Minneapolis, LLC	Minnesota
McCann-Erickson Marketing, Inc.	New York
McCann-Erickson USA, Inc.	Delaware
McCann-Erickson Worldwide, Inc.	Delaware
McCann Health North America, LLC	New Jersey
McCann Relationship Marketing, LLC	Delaware
Mediabrands Worldwide, Inc.	California
Momentum Events LLC	Delaware
Octagon, Inc.	District of Columbia
Reprise Media, Inc.	Delaware
True North Communications Inc.	Delaware
Universal McCann Worldwide, LLC	Delaware
Company Name	Country
Interpublic Group Deutschland GmbH	Germany
Interpublic Group of Companies de Espana, S.L.	Spain
Interpublic Holding Company, S.A. de C.V.	Mexico
Interpublic Limited	United Kingdom
IPG Advertising Israel Holdings Ltd	Israel
Kinesso Corp.	Canada
Orion Trading Canada Inc.	Canada
The Interpublic Group of Companies Canada, Inc.	Canada

EX-23

EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-196194, 333-208670 and 333-231710) and on Form S-3 (No. 333-263704) of The Interpublic Group of Companies, Inc. of our report dated February 20, 2024 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

New York, NY

February 20, 2024

EX-24

EXHIBIT 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each individual whose signature appears below constitutes and appoints PHILIPPE KRAKOWSKY, ELLEN JOHNSON, CHRISTOPHER F. CARROLL and ANDREW BONZANI, and each of them, as true and lawful attorneys-in-fact and agents with full power of substitution and resubstitution, for him or her, and in his or her name, place and stead, in any and all capacities, to sign the Report on Form 10-K for the year ended December 31, 2023, for The Interpublic Group of Companies, Inc., S.E.C. File No. 1-6686, and any and all amendments and supplements thereto and all other instruments necessary or desirable in connection therewith, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission and the New York Stock Exchange, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requested and necessary to be done in and about the premises as fully to all intents and purposes as he or she might do or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agents or any of them or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Dated: February 20, 2024

/s/ Jorge Benitez	/s/ Jocelyn Carter-Miller
Jorge Benitez	Jocelyn Carter-Miller
/s/ Mary J. Steele Guilfoile	/s/ Dawn Hudson
Mary J. Steele Guilfoile	Dawn Hudson
/s/ Philippe Krakowsky	/s/ Jonathan F. Miller
Philippe Krakowsky	Jonathan F. Miller
/s/ Patrick Q. Moore	/s/ Linda S. Sanford
Patrick Q. Moore	Linda S. Sanford
/s/ David M. Thomas	/s/ E. Lee Wyatt Jr.
David M. Thomas	E. Lee Wyatt Jr.
/s/ Ellen Johnson	/s/ Christopher F. Carroll
Ellen Johnson	Christopher F. Carroll

THE INTERPUBLIC GROUP OF COMPANIES, INC.

Certified Resolutions

I, Robert J. Dobson, Secretary of The Interpublic Group of Companies, Inc. (the "Corporation"), hereby certify that the resolutions attached hereto were duly adopted on February 20, 2024, by the Board of Directors of the Corporation and that such resolutions have not been amended or revoked.

WITNESS my hand and the seal of the Corporation this 20th day of February, 2024.

/s/ Robert J. Dobson

Robert J. Dobson

THE INTERPUBLIC GROUP OF COMPANIES, INC.

MEETING OF THE BOARD OF DIRECTORS

Resolutions re Form 10-K

    RESOLVED, that the Chief Executive Officer and the Executive Vice President and Chief Financial Officer of the Corporation be, and each of them hereby is, authorized to execute and deliver on behalf of the Corporation an annual report on Form 10-K for the year ended December 31, 2023, in the form presented to this meeting with such changes therein as either of them with the advice of the General Counsel shall approve; and further

    RESOLVED, that the Chief Executive Officer, the Executive Vice President and Chief Financial Officer in her capacity as Chief Financial Officer, and the Senior Vice President, Controller and Chief Accounting Officer in his capacity as Chief Accounting Officer of the Corporation be, and each of them hereby is, authorized to execute such annual report on Form 10-K; and further

    RESOLVED, that the officers of the Corporation be and each of them hereby is, authorized and directed to file such annual report on Form 10-K, with all the exhibits thereto and any other documents that may be necessary or desirable in connection therewith, after its execution by the foregoing officers and by a majority of this Board of Directors, with the Securities and Exchange Commission and the New York Stock Exchange; and further

    RESOLVED, that the officers and directors of the Corporation who may be required to execute such annual report on Form 10-K be, and each of them hereby is, authorized to execute a power of attorney in the form submitted to this meeting appointing Philippe Krakowsky, Ellen Johnson, Christopher F. Carroll and Andrew Bonzani, and each of them, severally, his or her true and lawful attorneys and agents to act in his or her name, place and stead, to execute said annual report on Form 10-K and any and all amendments and supplements thereto and all other instruments necessary or desirable in connection therewith; and further

    RESOLVED, that the signature of any officer of the Corporation required by law to affix his signature to such annual report on Form 10-K or to any amendment or supplement thereto and such additional documents as they may deem necessary or advisable in connection therewith, may be affixed by said officer personally or by any attorney-in-fact duly constituted in writing by said officer to sign his name thereto; and further

    RESOLVED, that the officers of the Corporation be, and each of them hereby is, authorized to execute such amendments or supplements to such annual report on Form 10-K and such additional documents as they may deem necessary or advisable in connection with any such amendment or supplement and to file the foregoing with the Securities and Exchange Commission and the New York Stock Exchange; and further

    RESOLVED, that the officers of the Corporation be, and each of them hereby is, authorized to take such actions and to execute such other documents, agreements or instruments as may be necessary or desirable in connection with the foregoing.

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Philippe Krakowsky, certify that:

1.I have reviewed this Annual Report on Form 10-K of The Interpublic Group of Companies, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 20, 2024	/s/ Philippe Krakowsky
	Philippe Krakowsky
	Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Ellen Johnson, certify that:

1.I have reviewed this Annual Report on Form 10-K of The Interpublic Group of Companies, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 20, 2024	/s/ Ellen Johnson
	Ellen Johnson
	Executive Vice President and Chief Financial Officer

EX-32

EXHIBIT 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), each of the undersigned officers of The Interpublic Group of Companies, Inc. (the “Company”), does hereby certify, to such officer's knowledge, that:

The Annual Report on Form 10-K for the year ended December 31, 2023, of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in the Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: February 20, 2024	/s/ Philippe Krakowsky
	Philippe Krakowsky
	Chief Executive Officer

Dated: February 20, 2024	/s/ Ellen Johnson
	Ellen Johnson
	Executive Vice President and Chief Financial Officer

EX-97

THE INTERPUBLIC GROUP OF COMPANIES, INC.

DODD-FRANK CLAWBACK POLICY

(Approved October 25, 2023)

Introduction

Pursuant to its authority delegated by the Board of Directors (the “Board”) of The Interpublic Group of Companies, Inc. (the “Company”), the Compensation and Leadership Talent Committee of the Board has adopted this Dodd-Frank Clawback Policy (this “Policy”) with the intention that it satisfy the requirements of Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (“Dodd-Frank”) and Section 303A.14 of the of the New York Stock Exchange (“NYSE”) Listed Company Manual (the “Listing Standards”). This Policy is in addition to, and shall not limit in any way, other policies of the Company and its affiliates in respect of compensation and forfeiture or recovery thereof.

Definitions and Rules of Construction

For purposes of this Policy, the following terms have the following meanings:

“Applicable Period” means the three completed fiscal years of the Company immediately preceding (i) the date the Board, a committee of the Board, or the officer or officers of the Company authorized to take such action if Board action is not required, concludes (or reasonably should have concluded) that the Company is required to prepare a Restatement, or (ii) the date a court, regulator, or other legally authorized entity directs the Company to prepare a Restatement, in each case, regardless of if or when the Restatement is actually filed. The “Applicable Period” also includes any transition period that results from a change in the Company’s fiscal year and occurs within or immediately following the three completed fiscal years identified in the preceding sentence, except that a transition period that comprises a period of at least nine months shall count as a completed fiscal year.

“Committee” means the Compensation and Leadership Talent Committee of the Board or any successor thereto that is established by the Board and comprises independent directors responsible for executive compensation decisions.

“Covered Executive” means each current or former Executive Officer of the Company.

“Effective Date” means October 2, 2023.

“Erroneously Awarded Compensation” has the meaning prescribed by the Listing Standards—i.e., the amount of Incentive-Based Compensation (calculated on a pre-tax basis) Received by a Covered Executive that exceeds the amount of Incentive-Based Compensation that would have been Received if the calculation were based on the restated amounts in connection with a Restatement. If the subject Incentive-Based Compensation (calculated on a

pre-tax basis) was based on stock price or total shareholder return, where the Erroneously Awarded Compensation is not subject to mathematical recalculation directly from the information in a Restatement, the Erroneously Awarded Compensation shall be based on a reasonable estimate by the Committee or the Board of the effect of the Restatement on the stock price or total shareholder return based upon which the Incentive-Based Compensation was Received, documentation of which shall be maintained by the Company and provided to NYSE to the extent required by the Listing Standards. In all cases, the amount of Erroneously Awarded Compensation shall be determined by the Committee in its sole and absolute discretion and in accordance with the Listing Standards.

“Executive Officer” has the meaning prescribed by the Listing Standards—i.e., each person who is designated as an “officer” of the Company in accordance with 17 C.F.R. 240.16a-1(f), including at a minimum each person designated as an “executive officer” of the Company for purposes of 17 C.F.R. § 229.401(b), and each other person (if any) who is in charge of a principal business unit, division or function, or otherwise performs a significant policy-making function for the Company, in each case as determined by the Board or the Committee in accordance with the Listing Standards. Executive officers of the Company’s subsidiaries shall not be deemed Executive Officers of the Company unless they perform significant policy-making functions for the Company (as determined by the Board or the Committee in its discretion).

“Financial Reporting Measure” has the meaning prescribed by the Listing Standards—i.e., a measure that is determined and presented in accordance with the accounting principles used in preparing the Company’s financial statements (including “non-GAAP” financial measures, such as those appearing in the Company’s earnings releases, if applicable), and each measure that is derived wholly or in part from such measures. Stock price and total shareholder return (and any measure derived in whole or in part from stock price or total shareholder return) are also Financial Reporting Measures. For the avoidance of doubt, a Financial Reporting Measure need not be presented in the Company’s financial statements or included in a filing with the SEC.

“Incentive-Based Compensation” has the meaning prescribed by the Listing Standards—i.e., any compensation that is granted, earned, or vested based wholly or in part upon the attainment of a Financial Reporting Measure.

“Policy” means this Dodd-Frank Clawback Policy, as in effect and amended from time to time.

“Received” has the meaning prescribed by the Listing Standards—i.e., Incentive-Based Compensation is deemed to be “Received” in the Company’s fiscal period during which the Financial Reporting Measure specified in the Incentive-Based Compensation award is attained, even if the payment, vesting or settlement of the Incentive-Based Compensation occurs after the end of such period.

“Restatement” means an accounting restatement described in paragraph (c)(1) of the Listing Standards—i.e., a restatement of any of the Company’s financial statements due to the Company’s material noncompliance with any financial reporting requirement under U.S. securities laws. “Restatement” includes any required accounting restatement to correct an error in previously issued financial statements that is material to the previously issued financial statements (commonly referred to as a “Big R” restatement), or that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period (commonly referred to as a “little r” restatement).

“SEC” means the U.S. Securities and Exchange Commission.

All rules of construction that apply for purposes of the Company’s Performance Incentive Plan (i.e., the 2019 Performance Incentive Plan or any successor thereto, as in effect) shall also apply for purposes of this Policy.

Administration

This Policy shall be administered by the Committee. The Committee shall interpret and construe this Policy and shall take such actions and prescribe such rules and regulations in connection with the operation of this Policy as it determines to be necessary, appropriate, or advisable for the administration of this Policy, and may rescind and amend such rules and regulations from time to time, in each case, consistent with this Policy. All determinations made by the Committee shall be final, conclusive and binding upon the Company and all persons affected hereunder and need not be uniform with respect to each Covered Executive. Subject to any limitation under applicable law, the Committee may authorize and empower any officer or employee of the Company or any of its affiliates to take any and all actions necessary or appropriate to carry out the purpose and intent of this Policy (other than with respect to any recovery under this Policy involving such officer).

Recovery Policy

If the Company is required to prepare a Restatement, the Company shall promptly recover all Erroneously Awarded Compensation Received by each Covered Executive during the Applicable Period; provided that recovery under this Policy shall not be required (i) of any Incentive-Based Compensation Received prior to the Effective Date, (ii) of any Incentive-Based Compensation Received while the recipient was serving in a non-executive capacity prior to becoming a Covered Executive, or (iii) from any Covered Executive who was not an Executive Officer at any time during the performance period for which Erroneously Awarded Compensation relates. Such recovery shall be made without regard to any individual knowledge or responsibility related to the Restatement or the Erroneously Awarded Compensation, and regardless of whether the Company’s or a Covered Executive’s misconduct or other action or omission was the cause for such Restatement. Notwithstanding the above provision, the Committee may decide to refrain from recovering the Erroneously Awarded Compensation if the

Committee determines, in good faith, that such recovery would be impracticable within the meaning of the Listing Standards to the extent that the following conditions are met:

(i)The direct expense paid to a third party to enforce this Policy would exceed the amount to be recovered. Before concluding that it would be impracticable to recover any amount of Erroneously Awarded Compensation based on expense of enforcement, the Company must make a reasonable attempt to recover such Erroneously Awarded Compensation, document such reasonable attempt(s) to recover, and provide that documentation to NYSE;

(ii)Recovery would violate home country law where that law was adopted prior to November 28, 2022. Before concluding that it would be impracticable to recover any amount of Erroneously Awarded Compensation based on violation of home country law, the Company must obtain an opinion of home country counsel, acceptable to NYSE, that recovery would result in such a violation, and must provide such opinion to NYSE; or

(iii)Recovery would likely cause an otherwise tax-qualified retirement plan, under which benefits are broadly available to employees of the Company or its subsidiaries, to fail to meet the requirements of 26 U.S.C. 401(a)(13) or 26 U.S.C. 411(a) and regulations thereunder.

Method of Recovery

Upon any recovery determination by the Committee, the Committee shall notify the Covered Executive in writing of its determination. The Committee may approve any method of recovery (or a combination of methods) that is permitted by the Listing Standards and other applicable law, as determined by the Committee in its sole discretion.

A Covered Executive who is required to repay any Incentive-Based Compensation, or to take any other action required or appropriate to effectuate recovery in accordance with this Policy, shall promptly repay such Incentive-Based Compensation and shall promptly take all such other actions, upon the Company’s demand, as determined by the Committee in its sole discretion. To the extent that a Covered Executive fails to repay all Erroneously Awarded Compensation when due, the Company shall take all actions reasonable and appropriate to recover such Erroneously Awarded Compensation from the applicable Covered Executive. The applicable Covered Executive shall be required to reimburse the Company for any and all expenses reasonably incurred (including legal fees) by the Company in recovering such Erroneously Awarded Compensation in accordance with the immediately preceding sentence.

Disclosure

It is intended that the Company shall make such disclosures with respect to Incentive-Based Compensation subject to this Policy, and any actions taken or omitted to be taken hereunder, with the SEC and NYSE, in each case, as may be required under any applicable requirements, rules or standards thereof.

Interpretation

This Policy shall be interpreted and enforced consistently with the intent to comply with Dodd-Frank and the Listing Standards.

No Indemnification or Reimbursement

Notwithstanding the terms of any other policy, program, agreement or arrangement, in no event shall the Company or any of its affiliates indemnify or reimburse any Covered Executive for the loss of any Erroneously Awarded Compensation that is required to be repaid or that is otherwise subject to recovery under this Policy. Further, in no event shall the Company or any of its affiliates pay or reimburse any Covered Executive for premiums on any insurance policy that would cover a Covered Executive’s potential obligations with respect to Erroneously Awarded Compensation under this Policy.

Effective Date

This Policy is effective as of the Effective Date, and shall apply to all Incentive-Based Compensation that is Received by Covered Executives on or after that date, except to the extent otherwise required by the Listing Standards or applicable law.

Governing Law

This Policy shall be governed by the laws of the State of New York, without regard to any conflicts or choice of law rule or principle that might otherwise refer construction or interpretation to the substantive law of another jurisdiction.

Amendment; Termination

The Committee or the Board may amend or terminate this Policy at any time in its sole discretion. Notwithstanding the preceding sentence, no amendment or termination of this Policy shall be effective if such amendment or termination would (after taking into account any actions taken by the Company contemporaneously with such amendment or termination) cause the Company to violate any federal securities laws, SEC rule or NYSE rule.

Other Recovery Rights

All Incentive-Based Compensation is subject to this Policy, without regard to any contrary provisions in any other policy, award agreement, or similar arrangement. All rights of recovery under this Policy are in addition to, and not in lieu of, other remedies and rights that may be available to the Company pursuant to any other policy or any agreement, plan or program,and nothing in this Policy shall limit any other right, remedy or enforcement mechanism available to the Company under any law, regulation, agreement or other authority to reduce, eliminate or recover compensation from any current, former or future Covered Executive. Nothing herein shall limit the authority of the Committee to impose additional

requirements or conditions that may give rise to the Company’s right to forfeit or recover any compensation. To the extent that applicable law, the Listing Standards, or any court order or court-approved settlement requires recovery of Erroneously Awarded Compensation in additional circumstances beyond those specified in this Policy, nothing in this Policy shall limit or restrict the rights or obligations thereunder.

Successors

This Policy shall be binding and enforceable against all Covered Executives and their beneficiaries, heirs, executors, administrators or other legal representatives.

* * *

THE INTERPUBLIC GROUP OF COMPANIES, INC.

DODD-FRANK CLAWBACK POLICY

Covered Executive Acknowledgement

Instructions. In accordance with NYSE Listing Requirements, The Interpublic Group of Companies, Inc. (the “Company”) has adopted and maintains the Dodd-Frank Clawback Policy (the “Policy”), a copy of which is attached. You should carefully review the Policy, then complete and sign this acknowledgement below and return it to [TITLE] by [__], 2023. Any questions regarding the Policy should be directed to [TITLE].

I, ____________________, acknowledge that I am a “Covered Executive” to whom the Policy applies. I affirm that I have received, and have read and familiarized myself with, the Policy, and that I accept and agree to be subject to the terms and conditions of the Policy, including any amendment thereto. If the Company’s Board of Directors or an authorized committee thereof (i.e., the Compensation and Leadership Talent Committee) determines that any amounts granted, awarded, earned or paid to me must be forfeited or reimbursed to the Company pursuant to the Policy, I will promptly take any and all actions necessary to effectuate such forfeiture and/or reimbursement.

_________________________________ ________________________

(Signature of Covered Executive) (Date)

Name:

Title:

XML

Document and Entity Information Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2023	Feb. 15, 2024	Jun. 30, 2023
DEI [Abstract]
Document Annual Report	true
Document Information [Line Items]
Document Type	10-K
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	1-6686
Entity Registrant Name	INTERPUBLIC GROUP OF COMPANIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-1024020
Entity Address, Address Line One	909 Third Avenue,
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10022
City Area Code	(212)
Local Phone Number	704-1200
Title of 12(b) Security	Common Stock, par value $0.10 per share
Trading Symbol	IPG
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		378,725,237
Entity Central Index Key	0000051644
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Entity Public Float			$ 14.9
ICFR Auditor Attestation Flag	true

XML

Audit Information	12 Months Ended
	Dec. 31, 2023
Auditor [Line Items]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	New York, New York
Auditor Firm ID	238

XML

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net revenue	$ 9,400.6	$ 9,449.4	$ 9,107.9
Billable expenses	1,488.7	1,478.4	1,132.8
Total revenue	10,889.3	10,927.8	10,240.7
OPERATING EXPENSES:
Salaries and related expenses	6,243.9	6,258.3	5,975.4
Office and other direct expenses	1,342.5	1,346.4	1,279.6
Billable expense	1,488.7	1,478.4	1,132.8
Cost of services	9,075.1	9,083.1	8,387.8
Selling, General and Administrative Expense	67.2	87.1	122.3
Depreciation and amortization	264.3	274.0	283.8
Restructuring Charges	0.1	102.4	10.6
Total operating expenses	9,406.7	9,546.6	8,804.5
OPERATING INCOME	1,482.6	1,381.2	1,436.2
EXPENSES AND OTHER INCOME:
Interest expense	(225.6)	(167.9)	(170.6)
Interest income	140.8	56.6	27.2
Other income (expense), net	10.2	(1.0)	(70.7)
Total (expenses) and other income	(74.6)	(112.3)	(214.1)
Income before income taxes	1,408.0	1,268.9	1,222.1
Provision for income taxes	291.2	318.4	251.8
Income of consolidated companies	1,116.8	950.5	970.3
Equity in net income of unconsolidated affiliates	1.3	5.6	2.5
NET INCOME	1,118.1	956.1	972.8
Net Income Attributable to Nonredeemable Noncontrolling Interest	(19.7)	(18.1)	(20.0)
Net Income Attributable to Parent	$ 1,098.4	$ 938.0	$ 952.8
Earnings per share available to IPG common stockholders:
Earnings per share, Basic	$ 2.86	$ 2.40	$ 2.42
Earnings per share, Diluted	$ 2.85	$ 2.37	$ 2.39
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, Basic	384.1	391.5	393.0
Weighted-average number of common shares outstanding, Diluted	385.9	395.1	398.4

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 1,118.1	$ 956.1	$ 972.8
Foreign Currency Translation:
Foreign currency translation adjustments	59.3	(131.8)	(86.1)
Reclassification adjustments recognized in net income	0.5	4.3	(1.0)
Foreign currency translation, net of tax	59.8	(127.5)	(87.1)
Derivatives instruments:
Changes in fair value of derivative instruments	0.6	17.5	14.0
Recognition of previously unrealized losses included in net income	(2.6)	(1.4)	4.2
Income tax effect	0.5	(4.0)	(2.1)
Derivative instruments, net of tax	(1.5)	12.1	16.1
Defined benefit pension and other postretirement plans:
Net actuarial (losses) gains for the period	(17.4)	2.4	58.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	6.8	6.3	9.4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	(0.3)	0.0	0.6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Other, before Tax	(2.1)	4.8	1.3
Income tax effect	2.0	0.8	(13.8)
Defined benefit pension and other postretirement plans, net of tax	(11.0)	14.3	55.5
Other comprehensive income (loss), net of tax	47.3	(101.1)	(15.5)
Total comprehensive income	1,165.4	855.0	957.3
Less: comprehensive income attributable to noncontrolling interests	19.5	16.5	18.5
Comprehensive Income Attributable to IPG	$ 1,145.9	$ 838.5	$ 938.8

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
ASSETS:
Cash and cash equivalents	$ 2,386.1	$ 2,545.3
Accounts receivable, net of allowance of $46.4 and $48.6, respectively	5,768.8	5,316.0
Accounts receivable, billable to clients	2,229.2	2,023.0
Prepaid Expense, Current	415.8	351.3
Assets held for sale	21.9	5.9
Other current assets	128.6	83.7
Total current assets	10,950.4	10,325.2
Property and equipment, net of accumulated depreciation of $1,224.9 and $1,244.8 respectively	636.7	637.4
Deferred Income Tax Assets, Net	265.0	271.7
Goodwill	5,080.9	5,050.6
Other intangible assets	743.6	818.1
Operating Lease, Right-of-Use Asset	1,162.6	1,277.5
Other non-current assets	428.1	431.2
TOTAL ASSETS	19,267.3	18,811.7
LIABILITIES:
Accounts payable	8,355.0	8,235.3
Accrued liabilities	705.8	787.1
Contract liabilities	684.7	680.0
Short-term borrowings	34.2	44.3
Current portion of long-term debt	250.1	0.6
Operating Lease, Liability, Current	252.6	235.9
Liabilities held for sale	48.5	0.0
Total current liabilities	10,330.9	9,983.2
Long-term debt	2,917.5	2,870.7
Operating Lease, Liability, Noncurrent	1,216.8	1,380.1
Deferred compensation	223.6	294.1
Other non-current liabilities	532.4	572.6
TOTAL LIABILITIES	15,221.2	15,100.7
Redeemable noncontrolling interests	42.3	38.3
STOCKHOLDERS' EQUITY:
Common stock, $0.10 par value, shares authorized: 800.0 shares issued: 2023 - 383.0; 2022 - 389.6 shares outstanding: 2023 - 378.7; 2022 - 386.5	38.3	38.9
Additional paid-in capital	728.5	1,057.5
Retained earnings	4,254.5	3,632.1
Accumulated other comprehensive loss, net of tax	(946.2)	(993.7)
Stockholders' Equity before Treasury Stock	4,075.1	3,734.8
Treasury Stock, Value	132.5	120.2
Total IPG stockholders' equity	3,942.6	3,614.6
Noncontrolling interests	61.2	58.1
TOTAL STOCKHOLDERS' EQUITY	4,003.8	3,672.7
TOTAL LIABILITIES AND EQUITY	$ 19,267.3	$ 18,811.7

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Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 46.4	$ 48.6
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 1,224.9	$ 1,244.8
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	800.0	800.0
Common stock, shares issued	383.0	389.6
Common stock, shares outstanding	378.7	386.5
Treasury stock, shares	4.3	3.1

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME	$ 1,118.1	$ 956.1	$ 972.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	264.3	274.0	283.8
Amortization of restricted stock and other non-cash compensation	46.7	50.0	70.1
Provision for uncollectible receivables	7.2	(8.9)	(14.6)
Deferred income tax provision	5.1	(27.0)	(8.2)
Net amortization of bond discounts and deferred financing costs	2.0	3.0	5.7
Loss on Extinguishment of Debt	0.0	0.0	74.0
Non-cash restructuring charges	(0.9)	101.8	9.8
Net (gains) losses on sales of businesses	(17.9)	11.3	19.4
Other	26.8	13.4	18.7
Changes in assets and liabilities, net of acquisitions and divestitures, providing (using) cash:
Accounts receivable	(385.3)	(362.7)	(647.6)
Accounts receivable, billable to clients	(181.4)	244.5	(571.0)
Increase (Decrease) in Prepaid Expense	46.0	55.6	26.7
Increase (Decrease) in Other Current Assets	42.2	5.5	19.2
Accounts payable	47.8	(408.0)	1,858.1
Accrued liabilities	(63.6)	(102.8)	108.9
Contract liabilities	(5.4)	17.8	40.9
Other non-current assets and liabilities	(220.6)	(59.3)	(99.3)
Net cash provided by operating activities	554.7	642.1	2,075.6
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	179.3	178.1	195.3
Payments to Acquire Marketable Securities	97.6	0.2	0.2
Payments to Acquire Businesses, Net of Cash Acquired, including adjustments for prior period acquisitons	6.3	232.2	(0.0)
Cash Divested from Deconsolidation	0.0	(20.4)	(16.3)
Proceeds from Hedge, Investing Activities	35.1	2.6	34.8
Proceeds from Divestiture of Businesses, Net of Cash Divested	58.7	(22.4)	(13.3)
Proceeds from Maturities, Prepayments and Calls of Short-Term Investments	100.7	0.0	0.0
Other investing activities	3.3	20.6	5.0
Net cash used in investing activities	(85.4)	(430.1)	(185.3)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock dividends	(479.1)	(457.3)	(427.7)
Payments for Repurchase of Common Stock	350.2	(320.1)	0.0
Tax payments for employee shares withheld	(58.9)	(40.3)	(25.5)
Distributions to noncontrolling interests	(17.7)	(12.3)	(15.5)
Acquisition-related payments	(12.9)	(9.3)	(28.0)
Net (decrease) increase in short-term borrowings	(8.2)	(29.4)	(10.8)
Repayments of long-term debt	(0.5)	(0.7)	(504.1)
Exercise of stock options	0.0	0.0	8.0
Repayments of Senior Debt	0.0	29.9	0.0
Early Repayment of Senior Debt	0.0	0.0	(1,066.8)
Proceeds from Long-term Debt	296.3	0.0	998.1
Other financing activities	(3.1)	(0.1)	(11.9)
Net cash used in financing activities	(634.3)	(899.4)	(1,084.2)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	7.0	(31.7)	(45.4)
Net (decrease) increase in cash, cash equivalents and restricted cash	(158.0)	(719.1)	760.7
Cash, cash equivalents and restricted cash at beginning of period	2,553.1	3,272.2	2,511.5
Cash, cash equivalents and restricted cash at end of period	$ 2,395.1	$ 2,553.1	$ 3,272.2

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Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock, Shares Issued [Member]	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss, Net of Tax	Total IPG Stockholders' Equity	Noncontrolling Interests	Treasury Stock
Common stock, shares issued		390.9
Balance at Dec. 31, 2020	$ 2,943.9		$ 39.0	$ 1,099.3	$ 2,636.9	$ (880.2)	$ 2,895.0	$ 48.9	$ 0.0
Net Income Attributable to Parent	952.8
NET INCOME	972.8				952.8		952.8
Net Income Attributable to Nonredeemable Noncontrolling Interest	20.0							20.0
Other comprehensive income	(15.5)					(14.0)	(14.0)	(1.5)
Reclassifications related to redeemable noncontrolling interests	22.7			11.3			11.3	11.4
Distributions to noncontrolling interests	(15.5)							(15.5)
Change in redemption value of RNCI	32.4			39.8	(7.4)		32.4
Payments for Repurchase of Common Stock	0.0
Retirement of treasury stock, shares		0.0
Common stock dividends	(428.0)				(428.0)		(428.0)
Stock-based compensation, shares		3.8
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	95.8		0.3	95.5			95.8
Exercise of stock options, shares		0.6
Exercise of stock options, Value	8.8		0.1	8.7			8.8
Shares withheld for taxes, shares		(1.0)
Shares withheld for taxes, value	(28.1)		(0.1)	(28.0)			(28.1)
Other	(0.1)			(0.0)			0.0	(0.1)
Balance at Dec. 31, 2021	3,589.2		39.3	1,226.6	3,154.3	(894.2)	3,526.0	63.2	0.0
Common stock, shares issued		394.3
Net Income Attributable to Parent	938.0
NET INCOME	956.1				938.0		938.0
Net Income Attributable to Nonredeemable Noncontrolling Interest	18.1							18.1
Other comprehensive income	(101.1)					(99.5)	(99.5)	(1.6)
Reclassifications related to redeemable noncontrolling interests	(2.6)			(3.1)			(3.1)	0.5
Distributions to noncontrolling interests	(12.3)							(12.3)
Change in redemption value of RNCI	(3.0)				(3.0)		(3.0)
Payments for Repurchase of Common Stock	320.1						320.1		(320.1)
Retirement of treasury stock, shares		7.2
Retirement of treasury stock	0.0		0.7	199.2			0.0		(199.9)
Common stock dividends	(457.2)				(457.2)		(457.2)
Stock-based compensation, shares		3.5
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	71.6		0.4	71.2			71.6
Shares withheld for taxes, shares		(1.0)
Shares withheld for taxes, value	(38.8)		(0.1)	(38.7)			(38.8)
Other	(9.1)			(0.7)			0.7	(9.8)
Balance at Dec. 31, 2022	$ 3,672.7		38.9	1,057.5	3,632.1	(993.7)	3,614.6	58.1	(120.2)
Common stock, shares issued	389.6	389.6
Net Income Attributable to Parent	$ 1,098.4				1,098.4		1,098.4
NET INCOME	1,118.1
Net Income Attributable to Nonredeemable Noncontrolling Interest	19.7							19.7
Other comprehensive income	47.3					47.5	47.5
Other Comprehensive Income (Loss), Tax, Portion Attributable to Noncontrolling Interest								(0.2)
Reclassifications related to redeemable noncontrolling interests	0.3							0.3
Distributions to noncontrolling interests	(17.7)							(17.7)
Change in redemption value of RNCI	2.6				2.6		2.6
Payments for Repurchase of Common Stock	(350.2)
Retirement of treasury stock, shares		9.3
Retirement of treasury stock	(0.0)		0.9	339.5			(0.0)		(340.4)
Payments for Repurchase of Common Stock, including excise taxes	(352.7)						(352.7)		(352.7)
Common stock dividends	(478.6)				(478.6)		(478.6)
Stock-based compensation, shares		4.4
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	70.1		0.5	69.6			70.1
Shares withheld for taxes, shares		(1.7)
Shares withheld for taxes, value	(59.3)		(0.2)	(59.1)			(59.3)
Other	(1.0)			(0.0)			0.0	(1.0)
Balance at Dec. 31, 2023	$ 4,003.8		$ 38.3	$ 728.5	$ 4,254.5	$ (946.2)	$ 3,942.6	$ 61.2	$ (132.5)
Common stock, shares issued	383.0	383.0

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Revenue Income Statement (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	$ 9,400.6	$ 9,449.4	$ 9,107.9
Billable expenses	1,488.7	1,478.4	1,132.8
Total revenue	10,889.3	10,927.8	10,240.7
OPERATING EXPENSES:
Salaries and related expenses	6,243.9	6,258.3	5,975.4
Office and other direct expenses	1,342.5	1,346.4	1,279.6
Billable expense	1,488.7	1,478.4	1,132.8
Cost of services	9,075.1	9,083.1	8,387.8
Selling, General and Administrative Expense	67.2	87.1	122.3
Depreciation and amortization	264.3	274.0	283.8
Total operating expenses	9,406.7	9,546.6	8,804.5
Operating Income (Loss)	1,482.6	1,381.2	1,436.2
EXPENSES AND OTHER INCOME:
Interest Expense	(225.6)	(167.9)	(170.6)
Interest income	140.8	56.6	27.2
Other income (expense), net	10.2	(1.0)	(70.7)
Total (expenses) and other income	(74.6)	(112.3)	(214.1)
Income before income taxes	1,408.0	1,268.9	1,222.1
Provision for income taxes	291.2	318.4	251.8
Income of consolidated companies	1,116.8	950.5	970.3
Equity in net income of unconsolidated affiliates	1.3	5.6	2.5
NET INCOME	1,118.1	956.1	972.8
Net Income Attributable to Parent	$ 1,098.4	$ 938.0	$ 952.8
Earnings per share, Basic	$ 2.86	$ 2.40	$ 2.42
Earnings per share, Diluted	$ 2.85	$ 2.37	$ 2.39
Weighted-average number of common shares outstanding, Basic	384.1	391.5	393.0
Weighted-average number of common shares outstanding, Diluted	385.9	395.1	398.4
MD&E
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	$ 4,326.5	$ 4,296.9	$ 4,117.7
Total revenue	4,394.8	4,381.6	4,196.6
IA&C
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	3,633.2	3,766.3	3,679.7
Total revenue	4,002.2	4,140.6	4,041.8
SC&E
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	1,440.9	1,386.2	1,310.5
Total revenue	2,492.3	2,405.6	2,002.3
United States
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	6,102.2	6,157.7	5,763.1
Total revenue	7,033.1	7,031.0	6,360.2
United States | MD&E
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	2,703.5	2,690.9	2,552.0
Total revenue	2,731.4	2,730.2	2,584.7
United States | IA&C
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	2,383.8	2,483.7	2,306.0
Total revenue	2,508.8	2,585.9	2,403.3
United States | SC&E
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	1,014.9	983.1	905.1
Total revenue	1,792.9	1,714.9	1,372.2
Total International
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	3,298.4	3,291.7	3,344.8
Total revenue	3,856.2	3,896.8	3,880.5
Total International | MD&E
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	1,623.0	1,606.0	1,565.7
Total revenue	1,663.4	1,651.4	1,611.9
Total International | IA&C
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	1,249.4	1,282.6	1,373.7
Total revenue	1,493.4	1,554.7	1,638.5
Total International | SC&E
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	426.0	403.1	405.4
Total revenue	$ 699.4	$ 690.7	$ 630.1

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Revenue Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cash and cash equivalents	$ 2,386.1		$ 2,545.3
Accounts receivable, net of allowance of $46.4 and $48.6, respectively	5,768.8		5,316.0
Accounts receivable, billable to clients	2,229.2		2,023.0
Assets held for sale	21.9		5.9
Other current assets	128.6		83.7
Assets, Current	10,950.4		10,325.2
Property, Plant and Equipment, Net	636.7		637.4
Goodwill	5,080.9	$ 5,050.6	5,050.6	$ 4,908.7	$ 4,908.7
Other intangible assets	743.6		818.1
Other non-current assets	428.1		431.2
Assets	19,267.3		18,811.7
Accounts Payable, Current	8,355.0		8,235.3
Accrued Liabilities, Current	705.8		787.1
Contract liabilities	684.7		680.0
Short-term borrowings	34.2		44.3
Current portion of long-term debt	250.1		0.6
Liabilities held for sale	48.5		0.0
Liabilities, Current	10,330.9		9,983.2
Long-term debt	2,917.5		2,870.7
Deferred compensation	223.6		294.1
Other non-current liabilities	532.4		572.6
Liabilities	15,221.2		15,100.7
Redeemable noncontrolling interests	42.3		38.3		15.6	$ 93.1
STOCKHOLDERS' EQUITY:
Common stock, $0.10 par value, shares authorized: 800.0 shares issued: 2023 - 383.0; 2022 - 389.6 shares outstanding: 2023 - 378.7; 2022 - 386.5	38.3		38.9
Additional Paid in Capital	728.5		1,057.5
Retained Earnings (Accumulated Deficit)	4,254.5		3,632.1
Accumulated other comprehensive loss, net of tax	(946.2)		(993.7)		(894.2)
Stockholders' Equity Attributable to Parent	3,942.6		3,614.6
Stockholders' Equity Attributable to Noncontrolling Interest	61.2		58.1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	4,003.8		3,672.7		$ 3,589.2	$ 2,943.9
Liabilities and Equity	$ 19,267.3		$ 18,811.7

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Revenue Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
NET INCOME	$ 1,118.1	$ 956.1	$ 972.8
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	264.3	274.0	283.8
Provision for uncollectible receivables	7.2	(8.9)	(14.6)
Amortization of restricted stock and other non-cash compensation	46.7	50.0	70.1
Net amortization of bond discounts and deferred financing costs	2.0	3.0	5.7
Deferred income tax provision	5.1	(27.0)	(8.2)
Net (gains) losses on sales of businesses	(17.9)	11.3	19.4
Other	26.8	13.4	18.7
Net Cash Provided by (Used in) Investing Activities [Abstract]
Accounts receivable	(385.3)	(362.7)	(647.6)
Accounts receivable, billable to clients	(181.4)	244.5	(571.0)
Accounts payable	47.8	(408.0)	1,858.1
Accrued liabilities	(63.6)	(102.8)	108.9
Contract liabilities	(5.4)	17.8	40.9
Other non-current assets and liabilities	(220.6)	(59.3)	(99.3)
Net cash provided by operating activities	554.7	642.1	2,075.6
Net cash used in investing activities	(85.4)	(430.1)	(185.3)
Net cash used in financing activities	(634.3)	(899.4)	(1,084.2)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	7.0	(31.7)	(45.4)
Net (decrease) increase in cash, cash equivalents and restricted cash	(158.0)	(719.1)	760.7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 2,395.1	$ 2,553.1	$ 3,272.2	$ 2,511.5

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Revenue Contract Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounts receivable, net of allowance of $46.4 and $48.6, respectively	$ 5,768.8	$ 5,316.0
Accounts receivable, billable to clients	2,229.2	2,023.0
Contract with Customer, Asset, after Allowance for Credit Loss	68.6	67.4
Contract liabilities	684.7	680.0
Revenue, remaining performance obligation, amount	716.5
Net revenue	$ 9,400.6	$ 9,449.4

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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities		$ 221.6	$ 171.1	$ 175.9
Change in operating lease right-of-use asset and lease liabilities		(32.4)	55.1	(35.2)
Cash paid for income taxes, net of refunds	[1]	320.3	255.7	229.1
Tax refunds		40.1	35.7	47.1
Restructuring Charges		0.1	102.4	10.6
Supplemental Cash Flow Elements [Abstract]
Lease restructuring costs			85.4	6.3
Change in operating lease right-of-use asset and lease liabilities		(32.4)	55.1	(35.2)
Net cash activities for operating lease right-of-use asset and lease liabilities included in Other non-current assets and liabilities under Operating Activities		$ 31.2	$ 30.3	$ 41.5

[1] Refunds of $40.1, $35.7 and $47.1 were received for the years ended December 31, 2023, 2022 and 2021, respectively.

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Significant Accounting Policies (Notes)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Business Description

The Interpublic Group of Companies, Inc. and subsidiaries (the “Company,” “IPG,” “we,” “us” or “our”) is one of the world’s premier global advertising and marketing services companies. Our agencies create customized marketing programs for clients that range in scale from large global marketers to regional and local clients. Comprehensive global services are critical to effectively serve our multinational and local clients in markets throughout the world, as they seek to build brands, increase sales of their products and services and gain market share.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but have the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are recorded at cost, less any impairment, adjusted for subsequent observable price changes. All intercompany accounts and transactions have been eliminated in consolidation.

We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

Basis of Presentation

We conduct our business across three reportable segments described in Note 15. The three reportable segments are: Media, Data & Engagement Solutions ("MD&E"), Integrated Advertising & Creativity Led Solutions ("IA&C"), and Specialized Communications & Experiential Solutions ("SC&E").

Cost of services is comprised of the expenses of our revenue-producing operating segments including salaries and related expenses, office and other direct expenses and billable expenses, as well as an allocation of the centrally managed expenses from Corporate and other. Office and other direct expenses include rent expense, professional fees, certain expenses incurred by our staff in servicing our clients and other costs directly attributable to client engagements.

Selling, general and administrative expenses are primarily the unallocated expenses from Corporate and other, as disclosed further in Note 15, excluding depreciation and amortization.

Depreciation and amortization of the fixed assets and intangible assets of the Company is disclosed as a separate operating expense.

Restructuring charges relate to the Company's implementation of cost initiatives to better align our cost structure with our revenue, as discussed further in Note 11.

Reclassifications

Certain reclassifications and immaterial adjustments have been made to prior-period financial statements to conform to the current-period presentation. Additionally, certain prior period amounts, wherever applicable, have been recast to reflect the transfer of certain agencies between reportable segments.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates under different assumptions or conditions. A further decline in macroeconomic conditions or increasing interest rates could have a negative impact on these estimates, including the fair value of certain estimates.

Revenue Recognition

Our revenues are primarily derived from the planning and execution of multi-channel advertising and communications, marketing services, including public relations, meeting and event production, sports and entertainment marketing, corporate and brand identity, strategic marketing consulting, and providing marketing data and technology services around the world.

Most of our client contracts are individually negotiated and, accordingly, the terms of client engagements and the basis on which we earn fees and commissions vary significantly. Our contracts generally provide for termination by either party on relatively short notice, usually 30 to 90 days, although our data management contracts typically have non-cancelable terms of

more than one year. Our payment terms vary by client, and the time between invoicing date and due date is typically not significant. We generally have the legally enforceable right to payment for all services provided through the end of the contract or termination date.

We recognize revenue when we determine our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue recognition, we perform the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue as or when we satisfy the performance obligation. We only apply the five-step model to contracts when it is probable that IPG will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, we assess the goods or services promised within each contract and determine those that are distinct performance obligations. We then assess whether we act as an agent or a principal for each identified performance obligation and include revenue within the transaction price for third-party costs when we determine that we act as principal. We typically do not capitalize costs to obtain a contract as these amounts would generally be recognized over a period of one year or less.

Revenue before billable expenses, primarily consisting of fees, commissions and performance incentives, represents the amount of our gross billings excluding billable expenses charged to a client. Generally, our compensation is based on a negotiated fixed price, rate per hour, a retainer, commission or volume. The majority of our fees are recognized over time as services are performed, either utilizing a function of hours incurred and rates per hour, as compared to periodically updated estimates to complete, or ratably over the term of the contract. For certain less-frequent commission-based contracts which contain clauses allowing our clients to terminate the arrangement at any time for no compensation, revenue is recognized at a point in time, typically the date of broadcast or publication. We report revenue net of taxes assessed by governmental authorities that are directly imposed on our revenue-producing transactions.

Contractual arrangements with clients may also include performance incentive provisions designed to link a portion of our revenue to our performance relative to mutually agreed-upon qualitative and/or quantitative metrics. Performance incentives are treated as variable consideration which is estimated at contract inception and included in revenue based on the most likely amount earned out of a range of potential outcomes. Our estimates are based on a combination of historical award experience, anticipated performance and our best judgment. These estimates are updated on a periodic basis and are not expected to result in a reversal of a significant amount of the cumulative revenue recognized.

The predominant component of billable expenses are third-party vendor costs incurred for performance obligations where we have determined that we are acting as principal. These third-party expenses are generally billed back to our clients. Billable expenses also includes incidental costs incurred in the performance of our services including airfare, mileage, hotel stays, out-of-town meals and telecommunication charges. We record these billable expenses within total revenue with a corresponding offset to operating expenses.

In international markets, we may receive rebates or credits from vendors based on transactions entered into on behalf of clients. Rebates and credits are remitted back to our clients in accordance with our contractual requirements or may be retained by us based on the terms of a particular client contract and local law. Amounts owed back to clients are recorded as a liability and amounts retained by us are recorded as revenue when earned.

In certain international markets, our media contracts may allow clients to terminate our arrangement at any time for no compensation to the extent that media has not yet run. For those contracts, we do not recognize revenue until the media runs which is the point in time at which we have a legally enforceable right to compensation.

In the normal course of business, certain agencies may enter into agreements with media suppliers to purchase an agreed value of media within a fixed timeframe. By entering into these agreements, the agency is taking a risk and may be required to pay a portion or all of the agreed value ahead of media being run. In order to participate in these arrangements and receive an agreed additional benefit from the agency, clients are required to contractually opt in.

Performance Obligations

Our client contracts may include various goods and services that are capable of being distinct, are distinct within the context of the contract and are therefore accounted for as separate performance obligations. We allocate revenue to each performance obligation in the contract at inception based on its relative standalone selling price.

Our advertising businesses include a wide range of services that involve the creation of an advertising idea, concept, campaign, or marketing strategy in order to promote the client’s brand ("creative services"), and to act as an agent to facilitate the production of advertisements by third-party suppliers ("production services”). Our clients can contract us to perform one or both of these services, as they can derive stand-alone benefit from each. Production services can include formatting creative material for different media and communication mediums including digital, large-scale reproduction such as printing and

adaptation services, talent engagement and acquisition, television and radio production, and outdoor billboard production. Our contracts that include both services are typically explicit in the description of which activities constitute the creative advertising services and those that constitute the production services. Both the creative and production services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our advertising contracts.

Our media businesses include services to formulate strategic media plans ("media planning services") and to act as an agent to purchase media (e.g. television and radio spots, outdoor advertising, digital banners, etc.) from vendors on our clients' behalf ("media buying services"). Our contracts that include both services are typically explicit in the description of which activities constitute the planning services and those that constitute the buying services. Both the planning and buying services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our media contracts.

Our events businesses include creative services related to the conception and planning of custom marketing events as well as activation services which entail the carrying out of the event, including, but not limited to, set-up, design and staffing. Additionally, our public relations businesses include a broad range of services, such as strategic planning, social media strategy and the monitoring and development of communication strategies, among others. While our contracts in these businesses may include some or all of these services, we typically identify only one performance obligation in the assessment of our events and public relations contracts as we provide a significant service of integrating the individual services into a combined service for which the customer has contracted.

Our data and technology services businesses include data management, data and data strategy, identity resolution, and measurement and analytics products and services. While our contracts in these businesses may include some or all of these services, we typically identify each product and service as an individual performance obligation.

We have elected not to disclose information about remaining performance obligations that have original expected durations of one year or less. The majority of our contracts are for periods of one year or less with the exception of our data management contracts.

Principal vs. Agent

When a third-party is involved in the delivery of our services to the client, we assess whether or not we are acting as a principal or an agent in the arrangement. The assessment is based on whether we control the specified services at any time before they are transferred to the customer. We have determined that in our events and public relations businesses, we generally act as a principal as our agencies provide a significant service of integrating goods or services provided by third parties into the specified deliverable to our clients. In addition, we have determined that we are responsible for the performance of the third-party suppliers, which are combined with our own services, before transferring those services to the customer. We have also determined that we act as principal when providing creative services and media planning services, as we perform a significant integration service in these transactions. For performance obligations in which we act as principal, we record the gross amount billed to the customer within total revenue and the related incremental direct costs incurred as billable expenses.

In the vast majority of our business, when a third-party is involved in the production of an advertising campaign and for media buying services, we have determined that we act as the agent and are solely arranging for the third-party suppliers to provide services to the customer. Specifically, we do not control the specified services before transferring those services to the customer, we are not primarily responsible for the performance of the third-party services, nor can we redirect those services to fulfill any other contracts. We do not have inventory risk or discretion in establishing pricing in our contracts with customers. For performance obligations for which we act as the agent, we record our revenue as the net amount of our gross billings less amounts remitted to third parties.

Cash and Cash Equivalents

Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

Allowance for Expected Credit Losses

The allowance for credit losses on expected future uncollectible accounts receivable is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

Accounts Receivable, Billable to Clients

Accounts receivable, billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in accounts receivable, billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

Accounts Payable

Accounts payable includes all operating payables, including those related to all media and production costs. These payables are due within one year.

Investments

Equity investments with readily determinable fair values, other than those accounted for using the equity method of accounting, will be measured at fair value. We regularly review our investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment, with changes to fair value recorded in earnings. We evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if a decline in value of an investment has occurred.

Derivatives

We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the changes in the fair value of the derivative are recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings. If a derivative is a net investment hedge, then the changes in the fair value of the derivative are recognized in other comprehensive income in the same period as the change in fair value of the underlying hedged foreign investment.

Property and Equipment

Furniture, equipment, leasehold improvements and buildings are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture and equipment, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements. Land is stated at cost and is not depreciated.

We capitalize certain internal and external costs incurred to acquire or create internal use software, principally related to our enterprise resource planning (“ERP”) systems. Our ERP systems are stated at cost, net of accumulated amortization, and are amortized using the straight-line method over 10 years. All other internal use computer software are stated at cost, net of accumulated amortization and are amortized using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years.

Leases

As of December 31, 2023, we do not have a material amount of finance leases and the majority of our operating leases, for which we serve as the lessee, consist primarily of real-estate property for our offices around the world. Both the right-of-use asset and lease liability are measured at the present value of the future lease payments, with the asset being subject to adjustments such as initial direct costs, prepaid lease payments, and lease incentives. Many of our leases provide for renewal and/or termination options, as well as escalation clauses, which are also factored into our lease payments when appropriate. The discount rate used to measure the lease asset and liability is determined at the beginning of the lease term using the rate implicit in the lease, if readily determinable, or using the Company's collateralized credit-adjusted borrowing rate.

Goodwill and Other Intangible Assets

We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of

future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

We review goodwill as of October 1st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 10 reporting units that were subject to the 2023 annual impairment testing. Our annual impairment review as of October 1, 2023 did not result in an impairment charge for any of our reporting units.

Intangible assets with indefinite useful lives are not amortized but are evaluated for impairment annually or more frequently if events or changes in circumstances indicate that impairment may exist. The Company first assesses qualitative factors to determine whether it is necessary to perform a quantitative impairment test for indefinite-lived intangible assets. Impairment exists if the fair value of the indefinite-lived intangible asset is less than the carrying value. The determination of fair value is based on the relief from royalty method of the income approach, which models the cash flows from indefinite-lived intangibles assuming royalties were received under a licensing arrangement. This discounted cash flow analysis includes assumptions related to forecasted future revenues attributable to indefinite-lived intangibles, royalty rates and risk-adjusted discount rates. If the carrying value of an indefinite-lived intangible asset exceeds its estimated fair value, the indefinite-lived intangible asset is considered impaired, and an impairment loss will be recognized in an amount equal to the excess of the carrying value over the fair value. Based on this analysis, for the indefinite lived-intangible asset for which we performed a quantitative impairment test as of October 1, 2023, we concluded that it was not impaired because its fair value was in excess of its carrying value.

For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The sum of the fair values of all our reporting units is also reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the quantitative impairment test is failed and impaired goodwill is written down to its fair value with a charge to expense in the period the impairment is identified.

The fair value of each reporting unit for 2023 and 2022 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data.

We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these asset groups. These asset groups are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

Foreign Currencies

The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax loss of $5.7 for the year ended December 31, 2023, a pre-tax gain of $2.5 for the year ended December 31, 2022, and a pre-tax loss of $5.0 for the year ended December 31, 2021.

We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country is changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses are recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

Income Taxes

The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. The factors used in assessing valuation allowances include all available evidence, such as past operating results, estimates of future taxable income and the feasibility of tax planning strategies. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Redeemable Non-controlling Interests

Many of our acquisitions include provisions under which the non-controlling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable non-controlling interests may be contingent on projected operating performance and satisfying other conditions specified in the related agreements. These payments are also subject to revision in accordance with the terms of the agreements. We record these redeemable non-controlling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable non-controlling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings but will not impact net income. Adjustments as a result of currency translation will affect the redeemable non-controlling interest balance, but do not impact retained earnings or additional paid-in capital.

Earnings Per Share (“EPS”)

Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued.

Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities were exercised. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation.

We may be required to calculate basic EPS using the two-class method as a result of our redeemable non-controlling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable non-controlling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2023, 2022 and 2021, there was no impact to EPS for adjustments related to our redeemable non-controlling interests.

Pension and Postretirement Benefits

We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

Stock-Based Compensation

Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

Treasury Stock

We account for repurchased common stock under the cost method and include such treasury stock as a component of our Consolidated Statements of Stockholders' Equity. Upon retirement, we reduce common stock for the par value of the shares being retired and the excess of the cost of the shares over par value as a reduction to APIC, to the extent there is APIC in the same class of stock, and any remaining amount to retained earnings. These retired shares remain authorized but unissued.

In October 2023, we retired 9.3 shares of our treasury stock, which resulted in a reduction in common stock of $0.9, treasury stock of $340.4 and APIC of $339.5. In October 2022, we retired 7.2 shares of our treasury stock, which resulted in a reduction in common stock of $0.7, treasury stock of $199.9 and APIC of $199.2. During 2021, there was no significant treasury stock activity due to the suspension of the share repurchase program.

Treasury Stock [Text Block]

Treasury Stock

We account for repurchased common stock under the cost method and include such treasury stock as a component of our Consolidated Statements of Stockholders' Equity. Upon retirement, we reduce common stock for the par value of the shares being retired and the excess of the cost of the shares over par value as a reduction to APIC, to the extent there is APIC in the same class of stock, and any remaining amount to retained earnings. These retired shares remain authorized but unissued.

In October 2023, we retired 9.3 shares of our treasury stock, which resulted in a reduction in common stock of $0.9, treasury stock of $340.4 and APIC of $339.5. In October 2022, we retired 7.2 shares of our treasury stock, which resulted in a reduction in common stock of $0.7, treasury stock of $199.9 and APIC of $199.2. During 2021, there was no significant treasury stock activity due to the suspension of the share repurchase program.

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Revenue (Notes)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

Contract assets are primarily comprised of contract incentives that are generally satisfied annually under the terms of our contracts and are transferred to accounts receivable when the right to payment becomes unconditional. Contract liabilities relate to advance consideration received from customers under the terms of our contracts primarily related to reimbursements of third-party expenses, whether we act as principal or agent, and to a lesser extent, periodic retainer fees, both of which are generally recognized shortly after billing.

The majority of our contracts are for periods of one year or less with the exception of our data management contracts. For those contracts with a term of more than one year, we had approximately $716.5 of unsatisfied performance obligations as of December 31, 2023, which will be recognized as services are performed over the remaining contractual terms through 2028.

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Leases (Notes)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Lessee, Operating Leases [Text Block]

Leases

As of December 31, 2023 and 2022, the majority of our operating leases, for which we serve as the lessee, consist primarily of real-estate property for our offices around the world, and we do not have a material amount of finance leases. Both the right-of-use asset and lease liability are measured at the present value of the future lease payments, with the asset being subject to adjustments such as initial direct costs, prepaid lease payments, and lease incentives. Many of our leases provide for renewal and/or termination options, as well as escalation clauses, which are also factored into our lease payments when appropriate. As of December 31, 2023, our leases have remaining lease terms of 1 year to 13 years. The discount rate used to measure the lease

asset and liability is determined at the beginning of the lease term using the rate implicit in the lease, if readily determinable, or using the Company's collateralized credit-adjusted borrowing rate.

The following tables present information on our operating leases for the full years of 2023, 2022 and 2021.

	Years ended December 31,
	2023			2022			2021
Operating lease cost	$	268.4		$	290.7		$	306.0
Short-term lease cost	7.9			6.4			8.1
Sublease income	(26.4)			(23.8)			(21.1)
Total lease cost	$	249.9		$	273.3		$	293.0
Cash paid related to operating lease liabilities	$	299.5		$	320.9		$	347.6
Right-of-use assets obtained in exchange for lease liabilities	$	83.0		$	93.0		$	431.0
	As of December 31,
	2023			2022			2021
Weighted-average remaining lease term	Seven years			Eight years			Eight years
Weighted-average discount rate	3.63		%	3.51		%	3.45		%

Our future payments of our operating leases as of December 31, 2023 are listed in the table below.

Period	Payments
2024	$	299.6
2025	270.1
2026	249.8
2027	215.4
2028	170.9
Thereafter	458.4
Total future lease payments	1,664.2
Less: imputed interest	194.8
Present value of future lease payments	1,469.4
Less: current portion of operating leases	252.6
Non-current operating leases	$	1,216.8

As of December 31, 2023, we had additional operating leases that had not yet commenced with future lease payments of approximately $81.0 commencing in 2024 with lease terms of 1 to 12 years.

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Debt and Credit Agreements (Notes)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Debt Disclosure [Text Block]

Long-Term Debt

A summary of the carrying amounts of our long-term debt is listed below.

	Effective Interest Rate		December 31,
			2023 1		2022 1
4.200% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.0 and $0.1, respectively)	4.240	%	$	249.9	$	249.7
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $0.9 and $2.1, respectively)	4.780	%	497.0		496.4
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $2.6 and $3.8, respectively)	4.920	%	643.6		642.6
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.7 and $3.3, respectively)	2.512	%	496.0		495.5
5.375% Senior Notes due 2033 (less unamortized discount and issuance costs of $3.6 and $3.0, respectively)	5.650	%	293.4		—
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $0.9 and $5.0, respectively)	3.448	%	494.1		493.7
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.6 and $4.6, respectively)	5.480	%	492.8		492.6
Other notes payable and capitalized leases			0.8		0.8
Total long-term debt			3,167.6		2,871.3
Less: current portion			250.1		0.6
Long-term debt, excluding current portion			$	2,917.5	$	2,870.7

1See Note 13 for information on the fair value measurement of our long-term debt.

Annual maturities are scheduled as follows based on the book value as of December 31, 2023.

2024	$	250.1
2025	0.2
2026	0.2
2027	0.1
2028	497.0
Thereafter	2,420.0
Total long-term debt	$	3,167.6

For those debt securities that have a premium or discount at the time of issuance, we amortize the amount through interest expense based on the maturity date or the first date the holders may require us to repurchase the debt securities, if applicable. A premium would result in a decrease in interest expense, and a discount would result in an increase in interest expense in future periods. Additionally, we have debt issuance costs related to certain financing transactions which are also amortized through interest expense. As of December 31, 2023 and 2022, we had total unamortized debt issuance costs of $22.7 and $26.2, respectively. Our debt securities include covenants that, among other things, limit our liens and the liens of certain of our consolidated subsidiaries, but do not require us to maintain any financial ratios or specified levels of net worth or liquidity.

As of December 31, 2023 and 2022, the estimated fair value of the Company's long-term debt was $2,975.3 and $2,552.3, respectively. Refer to Note 13 for details.

Debt Transactions

5.375% Senior Notes due 2033

On June 8, 2023, we issued a total of $300.0 in aggregate principal amount of 5.375% unsecured senior notes (the "5.375% Senior Notes") due June 15, 2033. Upon issuance, the 5.375% Senior Notes were reflected in our unaudited Consolidated Balance Sheets at $292.9, net of discount of $3.8 and net of capitalized debt issuance costs, including commissions and offering expenses of $3.3, both of which will be amortized in interest expense through the maturity date using the effective interest method. Interest is payable semi-annually in arrears on June 15th and December 15th of each year, which commenced on December 15, 2023.

Credit Arrangement

We maintain a committed corporate credit facility, originally dated as of July 18, 2008, which has been amended and restated from time to time (the "Credit Agreement"). We use our Credit Agreement to increase our financial flexibility, to provide letters of credit primarily to support obligations of our subsidiaries and to support our commercial paper program. On November 1, 2021, we amended and restated the Credit Agreement. As amended, among other things, the maturity date of the Credit Agreement was extended to November 1, 2026 and the cost structure of the Credit Agreement was changed. The Credit Agreement continues to include a required leverage ratio, of not more than 3.50 to 1.00, among other customary covenants like limitations on our liens and the liens of our consolidated subsidiaries and limitations on the incurrence of subsidiary debt. At the election of the Company, the leverage ratio may be changed to not more than 4.00 to 1.00 for four consecutive quarters, beginning with the fiscal quarter in which there is an occurrence of one or more acquisitions with an aggregate purchase price of at least $200.0.

The Credit Agreement is a revolving facility, under which amounts borrowed by us or any of our subsidiaries designated under the Credit Agreement may be repaid and reborrowed, subject to an aggregate lending limit of $1,500.0, or the equivalent in other currencies. The Company has the ability to increase the commitments under the Credit Agreement from time to time by an additional amount of up to $250.0, provided the Company receives commitments for such increases and satisfies certain other conditions. The aggregate available amount of letters of credit outstanding may decrease or increase, subject to a sublimit on letters of credit of $50.0, or the equivalent in other currencies. Our obligations under the Credit Agreement are unsecured. As of both December 31, 2023 and 2022, there were no borrowings under the Credit Agreement; however, we had $9.5 and $10.3 of letters of credit under the Credit Agreement, which reduced our total availability to $1,490.5 and $1,489.7, respectively. In addition to other customary covenants, we are required to maintain the financial covenant listed below as of the end of each fiscal quarter for the period of four fiscal quarters then ended pursuant to our Credit Agreement. We were in compliance with all of our covenants in the Credit Agreement as of December 31, 2023.

Under the Credit Agreement, we can elect to receive advances bearing interest based on either the Base Rate or the Eurocurrency rate (each as defined in the Credit Agreement) plus an applicable margin that is determined based on our credit ratings. As of December 31, 2023, the applicable margin was 0.125% for Base Rate advances and 1.125% for Eurocurrency Rate borrowings. Letter of credit fees accrue on the average daily aggregate amount of letters of credit outstanding, at a rate equal to the applicable margin for Eurocurrency rate advances, and fronting fees accrue on the aggregate amount of letters of credit outstanding at an annual rate of 0.250%. We also pay a facility fee on each lender's revolving commitment of 0.125%, which is an annual rate determined based on our credit ratings.

	Financial Covenant
Leverage ratio (not greater than): 1	3.50x

1The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Uncommitted Lines of Credit

We also have uncommitted lines of credit with various banks that permit borrowings at variable interest rates and that are primarily used to fund working capital needs. We have guaranteed the repayment of some of these borrowings made by certain subsidiaries. If we lose access to these credit lines, we would have to provide funding directly to some of our operations. As of December 31, 2023 and 2022, the Company had uncommitted lines of credit in an aggregate amount of $780.7 and $936.2, under which we had outstanding borrowings of $34.2 and $44.3 classified as short-term borrowings on our Consolidated Balance Sheets, respectively. The average amounts outstanding during 2023 and 2022 were $47.9 and $61.2, respectively, with weighted-average interest rates of approximately 7.9% and 4.6%, respectively.

Commercial Paper

The Company is authorized to issue unsecured commercial paper up to a maximum aggregate amount outstanding at any time of $1,500.0. Borrowings under the commercial paper program are supported by the Credit Agreement described above. Commercial paper proceeds are used for working capital and general corporate purposes, including the repayment of maturing indebtedness and other short-term liquidity needs. Commercial paper maturities vary but may not exceed 397 days from the date of issue. As of both December 31, 2023 and 2022, there was no commercial paper outstanding. There was no outstanding commercial paper under the program during both 2023 and 2022.

Cash Pooling

We aggregate our domestic cash position on a daily basis. Outside the United States, we use cash pooling arrangements with banks to help manage our liquidity requirements. In these pooling arrangements, several IPG agencies agree with a single bank that the cash balances of any of the agencies with the bank will be subject to a full right of set-off against amounts other agencies owe the bank, and the bank provides for overdrafts as long as the net balance for all agencies does not exceed an agreed-upon level. Typically, each agency pays interest on outstanding overdrafts and receives interest on cash balances. Our Consolidated Balance Sheets reflect cash, net of bank overdrafts, under all of our pooling arrangements, and as of December 31, 2023 and 2022 the amounts netted were $2,718.0 and $2,411.2, respectively.

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Earnings Per Share (Notes)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.

	Years ended December 31,
	2023		2022		2021
Net income available to IPG common stockholders	$	1,098.4	$	938.0	$	952.8
Weighted-average number of common shares outstanding - basic	384.1		391.5		393.0
Dilutive effect of stock options and restricted shares	1.8		3.6		5.4
Weighted-average number of common shares outstanding - diluted	385.9		395.1		398.4
Earnings per share available to IPG common stockholders:
Basic	$	2.86	$	2.40	$	2.42
Diluted	$	2.85	$	2.37	$	2.39

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Acquisitions (Notes)

12 Months Ended

Dec. 31, 2023

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Acquisitions

We continue to evaluate strategic opportunities to expand our industry expertise, strengthen our position in high-growth and key strategic geographical markets and industry sectors, advance technological capabilities and improve operational efficiency through both acquisitions and increased ownership interests in current investments. Our acquisitions typically provide for an initial payment at the time of closing and additional contingent purchase price payments based on the future performance of the acquired entity. We have entered into agreements that may require us to purchase additional equity interests in certain consolidated and unconsolidated subsidiaries. The amounts at which we record these transactions in our financial statements are based on estimates of the future financial performance of the acquired entity, the timing of the exercise of these rights, changes in foreign currency exchange rates and other factors.

During 2023, we completed two acquisitions, one of which was included in the IA&C reportable segment, and one of which was included in the SC&E reportable segment. We paid $2.6, net of cash acquired and recorded approximately $11.7 of goodwill and $8.5 of other intangible assets related to the acquisitions.

During 2022, we completed one acquisition, recorded in the MD&E reportable segment. On September 23, 2022, we entered into a definitive purchase agreement to acquire approximately 83.9% of the outstanding shares of RafterOne with options to purchase the remaining outstanding shares. The transaction closed on October 3, 2022, subject to customary closing adjustments. We paid $232.2, net of cash acquired, related to the acquisition. The purpose of the acquisition is to combine the Company's media, creative, marketing services and analytics capabilities, global scale and consumer insights, with RafterOne's Salesforce capabilities for commerce, service, data, marketing and customer experience. We recorded approximately $211.7 of goodwill, of which approximately $2.2 was recorded during 2023, and $62.0 of other intangible assets related to the acquisition of RafterOne.

During 2021, no acquisitions occurred.

The results of operations of our acquired companies were included in our consolidated results from the closing date of each acquisition. We did not make any payments in stock related to our acquisitions in 2023, 2022 or 2021.

Details of cash paid for current and prior years' acquisitions are listed below.

	Years ended December 31,
	2023		2022		2021
Cost of investment: current-year acquisitions	$	5.8	$	235.4	$	—
Cost of investment: prior-year acquisitions	16.6		9.3		28.0
Less: net cash acquired	3.2		3.2		—
Total cost of investment	19.2		241.5		28.0
Operating payments 1	2.7		9.6		39.1
Total cash paid for acquisitions 2	$	21.9	$	251.1	$	67.1

1Represents cash payments for amounts that have been recognized in operating expenses since the date of acquisition either relating to adjustments to estimates in excess of the initial value of contingent payments recorded or were contingent upon the future employment of the former owners of the acquired companies. Amounts are reflected in the operating section of the Consolidated Statements of Cash Flows.

2Of the total cash paid for acquisitions, $6.3, $232.2 and $0.0 for the years ended December 31, 2023, 2022 and 2021, respectively, are classified under the investing section of the Consolidated Statements of Cash Flows as acquisitions, net of cash acquired. These amounts relate to initial payments for new transactions, as well as adjustments made to upfront payments related to prior year acquisitions. Of the total cash paid for acquisitions, $12.9, $9.3 and $28.0 for the years ended December 31, 2023, 2022 and 2021, respectively, are classified under the financing section of the Consolidated Statements of Cash Flows as acquisition-related payments. These amounts relate to deferred payments and increases in our ownership interest for prior acquisitions.

For companies acquired, we estimate the fair values of the assets and liabilities based on 100% of the business for consolidation. The purchase price in excess of the estimated fair value of the tangible net assets acquired is allocated to identifiable intangible assets and then to goodwill. Due to the characteristics of advertising, specialized marketing and communication services companies, our acquisitions typically do not have significant amounts of tangible assets since the principal assets we acquire are client relationships and talent. As a result, a substantial portion of the purchase price is primarily allocated to customer lists, trade names and goodwill.

For acquisitions, we record deferred payment and redeemable non-controlling interest amounts on our Consolidated Balance Sheets based on their acquisition-date fair value. Deferred payments are recorded on a discounted basis and adjusted quarterly, if necessary, through operating income or net interest expense, depending on the nature of the arrangement, for both changes in estimate and accretion between the acquisition date and the final payment date. See Note 16 for further information on contingent acquisition obligations. Redeemable non-controlling interests are adjusted quarterly, if necessary, to their estimated redemption value, but not less than their initial fair value. Any adjustments to the redemption value impact retained earnings or additional paid in capital, except for foreign currency translation adjustments. The following table presents changes in our redeemable non-controlling interests.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	38.3	$	15.6	$	93.1
Change in related non-controlling interests balance	(0.3)		(0.5)		2.2
Changes in redemption value of redeemable non-controlling interests:
Additions	7.4		30.3		0.0
Redemptions and other	(0.4)		(9.9)		(41.9)
Redemption value adjustments	(2.6)		3.0		(32.1)
Currency translation adjustments	(0.1)		(0.2)		(5.7)
Balance at end of period	$	42.3	$	38.3	$	15.6

For all acquisitions, if a portion of the deferred payments and purchases of additional interests after the effective date of purchase are contingent upon employment terms, then that amount is accounted for separately from the business combination and recognized as compensation expense over the required earn-out period. Payments deemed as compensation are excluded from the fair value purchase price allocation to tangible net assets and intangible assets acquired.

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Supplementary Data (Notes)

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Supplementary Data [Abstract]

Supplementary Data

Valuation and Qualifying Accounts – Accounts Receivable, Allowance for Expected Credit Losses

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	48.6	$	68.5	$	98.3
Charges to costs and expenses 1	7.2		(5.8)		(14.9)
Adjustments:
(Dispositions)/Acquisitions	(1.7)		(0.9)		(3.2)
Uncollectible accounts written off	(7.8)		(12.8)		(9.8)
Recoveries	0.1		1.9		0.3
Foreign currency translation adjustments	0.0		(2.3)		(2.2)
Balance at end of period	$	46.4	$	48.6	$	68.5

Property and Equipment

	December 31,
	2023		2022
Furniture and equipment	$	632.8	$	640.8
Leasehold improvements	507.0		528.6
Internal-use computer software	585.1		581.4
Land and buildings	136.7		131.4
Gross property and equipment	1,861.6		1,882.2
Less: accumulated depreciation and amortization	(1,224.9)		(1,244.8)
Total property and equipment, net	$	636.7	$	637.4

Total depreciation and amortization expense, which excludes the amortization of acquired intangibles, for property and equipment for the years ended December 31, 2023, 2022 and 2021 was $180.3, $189.3 and $197.6, respectively.

Accrued Liabilities

The following table presents the components of accrued liabilities.

	December 31,
	2023		2022
Salaries, benefits and related expenses	$	507.5	$	554.0
Income taxes payable	56.8		64.7
Interest	40.2		37.3
Office and related expenses	22.3		28.9
Acquisition obligations	2.9		18.7
Restructuring charges	0.6		2.2
Other	75.5		81.3
Total accrued liabilities	$	705.8	$	787.1

Other Income (Expense), Net

Results of operations include certain items that are not directly associated with our revenue-producing operations.

	Years ended December 31,
	2023		2022		2021
Net gains/(losses) on sales of businesses	$	17.9	$	(11.3)	$	(19.4)
Loss on early extinguishment of debt	—		—		(74.0)
Other	(7.7)		10.3		22.7
Total other income (expense), net	$	10.2	$	(1.0)	$	(70.7)

Net gains/(losses) on sales of businesses – During 2023, 2022 and 2021, the amounts recognized were related to sales of businesses and the classification of certain assets and liabilities, consisting primarily of accounts receivable and accounts payable, as held for sale within our MD&E, IA&C, and SC&E reportable segments. The businesses held for sale as of year-end primarily represent unprofitable, non-strategic agencies which are expected to be sold within the next twelve months. The sales of businesses and the classification of certain assets and liabilities as held for sale included cash, net of proceeds, of $58.7, $(22.4) and $(13.3) for the years ended 2023, 2022 and 2021, respectively, which is classified within the Proceeds from sale of businesses, net of cash sold line in our Consolidated Statements of Cash Flows.

Loss on early extinguishment of debt – During the first quarter of 2021, we recorded a loss of $74.0 related to the early extinguishment of all $250.0 in aggregate principal amount of our 4.000% Senior Notes, all $500.0 in aggregate principal amount of our 3.750% Senior Notes, and $250.0 of the $500.0 in aggregate principal amount of our 4.200% Senior Notes.

Other – During 2023, the majority of the amounts recognized were primarily related to pension and postretirement costs. During 2022, the majority of the amounts recognized were primarily related to a cash gain from the sale of an equity investment, partially offset by a non-cash loss related to the deconsolidation of a previously consolidated entity in which we maintain an equity interest. During 2021, the majority of the amounts recognized were related to a non-cash gain related to the deconsolidation of a previously consolidated entity in which we maintain an equity interest, and pension and postretirement costs.

Share Repurchase Programs

Supplementary Data

Cash Flow, Supplemental Disclosures

Supplemental Cash Flow Information

	Years ended December 31,
	2023		2022		2021
Cash paid for interest	$	221.6	$	171.1	$	175.9
Changes in operating lease right-of-use assets and lease liabilities 1	(32.4)		55.1		(35.2)
Cash paid for income taxes, net of refunds 2	320.3		255.7		229.1

1For the year ended December 31, 2023, comprised of the impairments of operating lease right-of-use asset of ($1.2) classified in Non-cash restructuring charges, offset by $31.2 net cash outflow, classified in Other non-current assets and liabilities in our Consolidated Statements of Cash Flows. For the year ended December 31, 2022, comprised of the impairments of operating lease right-of-use asset of $85.4, classified in Non-cash restructuring charges, offset by $30.3 net cash outflow, classified in Other non-current assets and liabilities in our Consolidated Statements of Cash Flows. For the year ended December 31, 2021, comprised of the impairments of operating lease right-of-use asset of $6.3, classified in Non-cash restructuring charges offset by $41.5 net cash outflow, classified in Other non-current assets and liabilities in our Consolidated Statements of Cash Flows.

2Refunds of $40.1, $35.7 and $47.1 were received for the years ended December 31, 2023, 2022 and 2021, respectively.

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Goodwill and Other Intangible Assets (Notes)

12 Months Ended

Dec. 31, 2023

Goodwill and intangible assets [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

Goodwill and Other Intangible Assets

Goodwill

Goodwill is the excess purchase price remaining from an acquisition after an allocation of purchase price has been made to identifiable assets acquired and liabilities assumed based on estimated fair values. The Company transitioned to the new segment reporting structure effective January 1, 2022 which resulted in certain changes to our operating segments and reporting units. Additionally, the Company transferred certain agencies between operating segments as of January 1, 2023 which resulted in certain changes to our reporting units and reportable segments. We have allocated goodwill to our reporting units using a relative fair value approach. In addition, we completed an assessment of any potential goodwill impairment for all reporting units immediately prior and subsequent to the reallocations and determined that no impairment existed.

The changes in the carrying value of goodwill for our reportable segments, MD&E, IA&C and SC&E, for the years ended December 31, 2023 and 2022 are listed below.

	IAN		DXTRA		MD&E		IA&C		SC&E		Total 1
Balance as of December 31, 2021	$	4,231.6	$	677.1	$	—	$	—	$	—	$	4,908.7
Goodwill Reallocation	(4,231.6)		(677.1)		2,293.0		1,920.2		695.5		—
Balance as of January 1, 2022	$	—	$	—	$	2,293.0	$	1,920.2	$	695.5	$	4,908.7
Acquisitions/(Dispositions) and Deconsolidations	—		—		209.5		(6.5)		—		203.0
Foreign currency and other	—		—		(14.9)		(35.1)		(11.1)		(61.1)
Balance as of December 31, 2022	$	—	$	—	$	2,487.6	$	1,878.6	$	684.4	$	5,050.6
Goodwill Reallocation	—		—		180.6		(180.6)		—		—
Balance as of January 1, 2023	$	—	$	—	$	2,668.2	$	1,698.0	$	684.4	$	5,050.6
Acquisitions/(Dispositions)	—		—		2.2		10.7		(9.8)		3.1
Foreign currency and other	—		—		7.1		14.5		5.6		27.2
Balance as of December 31, 2023	$	—	$	—	$	2,677.5	$	1,723.2	$	680.2	$	5,080.9

1For all periods presented, no goodwill impairment charge has been recorded.

See Note 1 for information regarding our annual impairment testing methodology.

Other Intangible Assets

Other intangible assets primarily consist of customer lists and know-how and technology, which have definite lives and are subject to amortization on a straight-line basis with estimated useful lives generally between 7 and 15 years, as well as trade names which have both indefinite and definite lives which are subject to amortization on a straight-line basis with estimated useful lives of 15 years. Amortization expense for other intangible assets for the years ended December 31, 2023, 2022 and 2021 was $84.0, $84.7 and $86.2, respectively. There were no material impairment charges on other intangibles for the years ended December 31, 2023, 2022 and 2021. During 2023 and 2022, we recorded approximately $8.5 and $62.0, respectively, of other intangible assets related to our acquisitions.

The following table provides a summary of other intangible assets, which are included in our Consolidated Balance Sheets.

	December 31,
	2023						2022
	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Customer lists	$	882.1	$	(431.6)	$	450.5	$	873.1	$	(378.4)	$	494.7
Know-how and technology	239.5		(138.9)		100.6		239.2		(111.1)		128.1
Trade names	227.3		(45.7)		181.6		231.8		(47.4)		184.4
Other	16.2		(5.3)		10.9		16.2		(5.3)		10.9
Total 1	$	1,365.1	$	(621.5)	$	743.6	$	1,360.3	$	(542.2)	$	818.1

1Total gross amount includes indefinite-lived intangible assets not subject to amortization of $165.7 and $165.4 in the years ended December 31, 2023 and 2022, respectively, which primarily consist of trade names.

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2023 is listed below.

	2024		2025		2026		2027		2028
Estimated amortization expense	$	83.1	$	80.4	$	78.4	$	65.1	$	49.8

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Income Taxes (Notes)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

As of December 31, 2023, there were $918.1 of loss carryforwards. These loss carryforwards were all non-U.S. tax loss carryforwards, of which $834.3 have unlimited carryforward periods and $83.8 have expiration periods from 2024 to 2043. As of December 31, 2023, the Company also had $22.9 in deferred tax assets for state net operating loss carryforwards and tax credit carryforwards, which will expire between 2024 and 2044.

As of December 31, 2023 and 2022, we had $1,633.6 and $1,496.9, respectively, of undistributed earnings attributable to foreign subsidiaries. The Company has historically asserted that its unremitted foreign earnings are permanently reinvested, and therefore has not recorded any deferred taxes on such amounts. It is not practicable to determine the deferred tax on these undistributed earnings because such liability, if any, is dependent on circumstances that exist if and when a remittance occurs, including the source location and amount of the distribution and foreign withholding taxes.

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Accumulated Other Comprehensive Loss, Net of Tax (Notes)

12 Months Ended

Dec. 31, 2023

Accumulated Other Comprehensive Loss [Abstract]

Comprehensive Income (Loss) Note

Accumulated Other Comprehensive Loss, Net of Tax

The following table presents the changes in accumulated other comprehensive loss, net of tax, by component.

	Foreign Currency Translation Adjustments		Derivative Instruments		Defined Benefit Pension and Other Postretirement Plans		Total
Balance as of December 31, 2021	$	(723.2)	$	22.9	$	(193.9)	$	(894.2)
Other comprehensive (loss) income before reclassifications	(130.2)		13.2		9.4		(107.6)
Amount reclassified from accumulated other comprehensive loss, net of tax	4.3		(1.1)		4.9		8.1
Balance as of December 31, 2022	$	(849.1)	$	35.0	$	(179.6)	$	(993.7)
Other comprehensive income (loss) before reclassifications	59.5		0.4		(15.8)		44.1
Amount reclassified from accumulated other comprehensive loss, net of tax	0.5		(1.9)		4.8		3.4
Balance as of December 31, 2023	$	(789.1)	$	33.5	$	(190.6)	$	(946.2)

Amounts reclassified from accumulated other comprehensive loss, net of tax, for the years ended December 31, 2023, 2022 and 2021 are as follows:

	Years ended December 31,						Affected Line Item in the Consolidated Statements of Operations
	2023		2022		2021
Foreign currency translation adjustments 1	$	0.5	$	4.3	$	(1.0)	Other income (expense), net
Net (gain) loss on derivative instruments	(2.6)		(1.4)		4.2		Other income (expense), net, Interest Expense
Amortization of defined benefit pension and postretirement plans items	6.5		6.3		10.0		Other income (expense), net
Tax effect	(1.0)		(1.1)		(3.1)		Provision for income taxes
Total amount reclassified from accumulated other comprehensive loss, net of tax	$	3.4	$	8.1	$	10.1

1These foreign currency translation adjustments are primarily a result of the sales of businesses.

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Restructuring Charges (Notes)

12 Months Ended

Dec. 31, 2023

Restructuring Charges [Abstract]

Restructuring and Related Activities Disclosure [Text Block]

Restructuring Charges

Restructuring Charges

	Years ended December 31,
	20231		20222		20213
Severance and termination costs	$	0.4	$	(0.1)	$	0.4
Lease restructuring costs	(1.2)		85.4		6.3
Other restructuring costs	0.9		17.1		3.9
Total restructuring charges	$	0.1	$	102.4	$	10.6

1The amounts for the year ended December 31, 2023 represent adjustments to the 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020.

2The amounts for the year ended December 31, 2022 represent 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020. The 2022 Real Estate Actions did not include any severance and termination costs.

3The amounts for the year ended December 31, 2021 represent adjustments to the actions taken in 2020.

Lease and Other restructuring costs include impairments of operating lease right-of-use assets and associated leasehold improvements, furniture and asset retirement obligations. Lease impairments were calculated based on estimated fair values using market participant assumptions including forecasted net discounted cash flows related to the operating lease right-of-use assets.

2022 Real Estate Actions

In the fourth quarter of 2022, the Company took Real Estate Actions related to new real estate exits and lease terminations to further optimize the real estate footprint supporting our office-home hybrid service model in a post-pandemic economy. All included opportunities for further efficiencies as a result of the current working environment were identified and completed during the fourth quarter of 2022.

These Real Estate Actions, taken during the fourth quarter of 2022, reduced our occupied global real estate footprint by approximately 6.7% or 500,000 square feet. All restructuring actions were identified and initiated in 2022, with all actions completed by the end of the fourth quarter of 2022.

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2023 is as follows:

			2022 Real Estate Actions
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Lease impairment costs	$	0.0	$	(0.9)	$	(0.9)	$	0.0	$	0.0
Other restructuring costs	0.0		0.8		0.2		0.6		0.0
Total	$	0.0	$	(0.1)	$	(0.7)	$	0.6	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2022 is as follows:

	2022 Real Estate Actions
	Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Lease impairment costs	$	84.4	$	84.4	$	0.0	$	0.0
Other restructuring costs	14.2		13.5		0.7		0.0
Total	$	98.6	$	97.9	$	0.7	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions by segment is as follows:

	Years ended December 31,
	2023		2022
Restructuring charges:
MD&E	$	(1.0)	$	69.0
IA&C	(0.3)		21.0
SC&E	1.1		8.0
Corporate and other	0.1		0.6
Total	$	(0.1)	$	98.6
Non cash lease impairment costs:
MD&E	$	(1.0)	$	54.3
IA&C	(0.5)		22.3
SC&E	0.4		7.0
Corporate and other	0.2		0.8
Total	$	(0.9)	$	84.4

2020 Restructuring Plan

Beginning in the second quarter of 2020, the Company took restructuring actions to lower its operating expenses structurally and permanently relative to revenue and to accelerate the transformation of our business (the “2020 Plan”).

All restructuring actions were identified and initiated in 2020, with all actions completed by the end of the fourth quarter of 2020 and were based on our experience and learning in the COVID-19 pandemic and a resulting review of our operations to address certain operating expenses such as occupancy expense and salaries and related expenses.

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2023 is as follows:

	2020 Plan
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Severance and termination costs	$	2.3	$	0.4	$	0.0	$	2.1	$	0.6
Lease impairment costs	0.0		(0.3)		(0.3)		0.0		0.0
Other restructuring costs	0.0		0.1		0.1		0.0		0.0
Total	$	2.3	$	0.2	$	(0.2)	$	2.1	$	0.6

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2022 is as follows:

	2020 Plan
	Liability at December 31, 2021		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Severance and termination costs	$	9.4	$	(0.1)	$	0.0	$	7.0	$	2.3
Lease impairment costs	0.0		1.0		1.0		0.0		0.0
Other restructuring costs	0.0		2.9		2.9		0.0		0.0
Total	$	9.4	$	3.8	$	3.9	$	7.0	$	2.3

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2021 is as follows:

	2020 Plan
	Liability at December 31, 2020		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2021
Severance and termination costs	$	74.6	$	0.4	$	0.3	$	65.3	$	9.4
Lease impairment costs	0.0		6.3		6.3		0.0		0.0
Other restructuring costs	0.0		3.9		3.2		0.7		0.0
Total	$	74.6	$	10.6	$	9.8	$	66.0	$	9.4

A summary of the restructuring activities related to the 2020 Plan by segment is as follows:

	Years ended December 31,
	2023		2022		2021
Restructuring charges:
MD&E	$	(0.3)	$	0.1	$	0.1
IA&C	0.5		7.7		2.6
SC&E	0.0		(4.2)		10.0
Corporate and other	0.0		0.2		(2.1)
Total	$	0.2	$	3.8	$	10.6
Non cash lease impairment costs:
MD&E	$	(0.3)	$	0.0	$	(0.9)
IA&C	0.0		7.0		(0.1)
SC&E	0.0		(5.9)		7.3
Corporate and other	0.0		(0.1)		0.0
Total	$	(0.3)	$	1.0	$	6.3

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Incentive Compensation Plans (Notes)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement, Additional Disclosure [Abstract]

Incentive Compensation Plans

Incentive Compensation Plans

2019 Performance Incentive Plan

We issue stock-based compensation and cash awards to our employees under various plans established by the Compensation and Leadership Talent Committee of the Board of Directors (the “Compensation Committee”) and approved by our shareholders. In May 2019, our shareholders approved the 2019 Performance Incentive Plan (the “2019 PIP”), replacing the 2014 Performance Incentive Plan (the “2014 PIP”) and previous incentive plans. The number of shares of common stock initially available for grants of all equity awards under the 2019 PIP is 27.0. Pursuant to the terms of the 2019 PIP, the number of shares that may be awarded to any one participant for any stock based awards is limited to 2.0. The vesting period of awards granted is generally commensurate with the requisite service period. We generally issue new shares to satisfy the exercise of stock options or the distribution of other stock-based awards.

Additionally, under the 2019 PIP, we have the ability to issue performance cash awards. The performance cash awards are granted to certain employees who otherwise would have been eligible to receive performance-based stock awards. These awards have a service period vesting condition and a performance vesting condition. The amount of the performance cash award received by an employee with a performance vesting condition can range from 0% to 300% of the target amount of the original grant value, except for Executive Officers of IPG, with a range of 0% to 200%. Performance cash awards generally vest in three years. The Compensation Committee may grant performance cash awards to any eligible employee; however, no employee can receive more than $10.0 during a performance period.

The amounts of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statements of Operations, and the related tax benefit, are listed below.

	Years ended December 31,
	2023		2022		2021
Stock-settled awards	$	27.8	$	26.3	$	36.7
Cash-settled awards	0.3		0.3		1.0
Performance-based awards	18.9		23.7		33.4
Stock Options	0.3		0.3		0.3
Employee stock purchase plan	2.9		3.1		2.1
Other 1	2.7		2.0		11.3
Stock-based compensation expense	$	52.9	$	55.7	$	84.8
Tax benefit	$	12.5	$	13.1	$	18.0

1Represents charges recorded for severance expense related to stock-based compensation awards.

Stock Options

Stock options are granted with the exercise price equal to the fair market value of our common stock on the grant date. We use the Black-Scholes option-pricing model to estimate the fair value of options granted, which requires the input of subjective assumptions including the option’s expected term and the price volatility of the underlying stock. They are generally first exercisable between two and four years from the grant date and expire ten years after the grant date (or earlier in the case of certain terminations of employment). There were no stock options granted during the year ended December 31, 2023, no stock options granted during the year ended December 31, 2022 and 0.3 stock options granted during the year ended December 31, 2021.

The following table summarizes our stock option activity during 2023.

	Options	Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2023	0.3	$	23.30
Granted	0.0	0.0
Exercised	0.0	$	12.77
Stock options outstanding as of December 31, 2023	0.3	$	23.33	7.0	$	2.3

There were 0.0 stock options exercised in 2023 and there were 0.0 and 0.6 stock options exercised during 2022 and 2021, respectively. The total intrinsic value of stock options exercised during 2023, 2022 and 2021 was $0.0, $0.0 and $8.8, respectively. The cash received from the stock options exercised in 2023, 2022 and 2021 was $0.0, $0.0 and $12.2, which included taxes withheld of $0.0, $0.0, and $4.2, respectively.

Stock-Based Compensation

We grant other stock-based compensation awards such as stock-settled awards, cash-settled awards and performance-based awards (settled in cash or shares) to certain key employees. The number of shares or units received by an employee for performance-based awards depends on Company performance against specific performance targets and could range from 0% to 300% of the target amount of shares originally granted, except for Executive Officers of IPG, with a range of 0% to 200%. Incentive awards are subject to certain restrictions and vesting requirements as determined by the Compensation Committee. The fair value of the shares on the grant date is amortized over the vesting period, which is generally three years. Upon completion of the vesting period for cash-settled awards, the grantee is entitled to receive a payment in cash based on the fair market value of the corresponding number of shares of common stock. No monetary consideration is paid by a recipient for any incentive award. The fair value of cash-settled awards is adjusted each quarter based on our share price. The holders of certain stock-settled awards have the right to receive dividends. Dividends declared on common stock are accrued during the vesting period and paid when the award vests. The holders of performance-based awards have no ownership interest in the underlying shares of common stock until the awards vest and the shares of common stock are issued.

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2023 and 2022.

	Years ended December 31,
	2023		2022		2021
Stock-Settled Awards:
Awards granted	1.4		1.3		0.9
Weighted-average grant-date fair value (per award)	$	35.54	$	36.36	$	26.96
Total fair value of vested awards distributed	$	60.8	$	59.7	$	50.8
Cash-Settled Awards:
Awards granted	0.0		0.0		0.0
Weighted-average grant-date fair value (per award)	$	35.71	$	36.53	$	0.0
Total fair value of vested awards distributed	$	0.8	$	0.8	$	0.7
Performance-Based Awards:
Awards granted	2.1		1.6		0.5
Weighted-average grant-date fair value (per award)	$	26.31	$	29.95	$	21.98
Total fair value of vested awards distributed	$	84.8	$	54.5	$	39.3

In conjunction with common stock dividends declared in 2023 and 2022, we accrued dividends of $3.0 and $3.7, respectively, on non-vested stock-settled and cash-settled awards and paid dividends of $5.3 and $4.9 for stock-settled and cash-settled awards that vested during 2023 and 2022, respectively.

A summary of the activity of our non-vested stock-settled awards, cash-settled awards and performance-based awards during 2023 is presented below (performance-based awards are shown at 100% of the shares originally granted).

	Stock-Settled Awards				Cash-Settled Awards				Performance-Based Awards
	Awards		Weighted- Average Grant-Date Fair Value (per award)		Awards		Weighted- Average Grant-Date Fair Value (per award)		Awards		Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2023	3.5		$	27.52	0.0		$	27.96	2.9		$	24.31
Reinstated	0.1		29.25		0.0		0.0		0.0		33.26
Granted	1.4		35.54		0.0		35.71		2.1		26.31
Vested	(1.7)		21.92		0.0		21.02		(2.4)		18.03
Forfeited	(0.4)		31.04		0.0		34.96		(0.3)		27.82
Non-vested as of December 31, 2023	2.9		$	34.20	0.0		$	36.05	2.3		$	32.09
Total unrecognized compensation expense remaining	$	47.9			$	0.7			$	34.1
Weighted-average years expected to be recognized over	1.4				1.7				1.8

In conjunction with our annual grant of long-term incentive compensation awards, we reviewed our estimates and assumptions in 2023, which resulted in a forfeiture rate slightly less than prior years.

2020 Restricted Cash Plan

In November 2020, the Compensation Committee approved a new Interpublic Restricted Cash Plan, (collectively the “Cash Plans”). Under the Cash Plan, the Board, the Compensation Committee or the Plan Administrator may grant cash awards to certain employees eligible to receive cash-settled awards. Cash awards, when granted, have a service-period vesting condition and generally vest in two years or three years.

Cash Awards

During the years ended December 31, 2023, 2022 and 2021, the Compensation Committee granted cash awards under the Cash Plans with a total target value of $20.4, $19.9 and $85.8, respectively. For those same years, we recognized $31.5, $42.0 and $47.8, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

During the years ended December 31, 2023, 2022 and 2021, the Compensation Committee granted performance awards to be settled in cash under the 2019 PIP with a total target value of $46.2, $46.0, and $40.4, respectively. For those same years, we recognized $38.0, $44.7 and $52.1, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

We amortize the present value of the amount expected to vest for cash awards and performance cash awards over the vesting period using the straight-line method, less an assumed forfeiture rate. Cash awards do not fall within the scope of the authoritative guidance for stock compensation as they are not paid in equity and the value of the award is not correlated with our stock price. Due to the cash nature of the payouts and the vesting period, we account for these awards in accordance with authoritative guidance for deferred compensation arrangements.

Employee Stock Purchase Plans

In May 2016, our shareholders approved The Interpublic Group of Companies Employee Stock Purchase Plan (2016) (the “ESPP”), replacing the prior employee stock purchase plan under which, prior to its expiration on December 31, 2015, 3.0 shares were issued. Under the ESPP, eligible employees may purchase our common stock through payroll deductions not exceeding 10% of their eligible compensation or 900 (actual number) shares each offering period, consistent with the prior employee stock purchase plan. The price an employee pays for a share of common stock under the ESPP is 90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months. An aggregate of approximately 10.0 shares are reserved for issuance under the ESPP, of which 3.1 shares have been issued since the inception of the ESPP through December 31, 2023. During the year ended December 31, 2023, 0.6 shares with a value of $18.7 were issued under the ESPP.

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Fair Value Measurements (Notes)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Fair Value Measurements

Authoritative guidance for fair value measurements establishes a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:

Level 1	Unadjusted quoted prices in active markets for identical assets or liabilities. An active market for the asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
Level 2	Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Financial Instruments that are Measured at Fair Value on a Recurring Basis

We primarily apply the market approach to determine the fair value of financial instruments that are measured at fair value on a recurring basis. There were no changes to our valuation techniques used to determine the fair value of financial instruments during 2023 as compared to the prior year.

The following tables present information about our financial instruments measured at fair value on a recurring basis as of December 31, 2023 and 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2023								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	1,521.5	$	—	$	—	$	1,521.5	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	$	—	$	—	$	3.1	$	3.1	Accrued liabilities and Other non-current liabilities
	December 31, 2022								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	1,688.1	—		—		$	1,688.1	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	—		—		21.6		$	21.6	Accrued liabilities and Other non-current liabilities

1Contingent acquisition obligations includes deferred acquisition payments and unconditional obligations to purchase additional non-controlling equity shares of consolidated subsidiaries. Fair value measurement of the obligations is based upon actual and projected operating performance targets as specified in the related agreements. The decrease in this balance of $18.5 from December 31, 2022 to December 31, 2023 is primarily due to payments related to our deferred acquisitions from prior-year acquisitions and valuation adjustments, partially offset by the addition of a new contingent acquisition obligation and the exercises of redeemable non-controlling interest. The amounts payable within the next twelve months are classified in accrued liabilities; any amounts payable thereafter are classified in other non-current liabilities.

Financial Instruments that are not Measured at Fair Value on a Recurring Basis

The following table presents information about our financial instruments that are not measured at fair value on a recurring basis as of December 31, 2023, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2023								December 31, 2022
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Total long-term debt	$	—	$	2,974.5	$	0.8	$	2,975.3	$	—	$	2,551.5	$	0.8	$	2,552.3

Our long-term debt is comprised of senior notes and other notes payable. The fair value of our senior notes, which are traded over-the-counter, is based on quoted prices in markets that are not active. Therefore, these senior notes are classified as Level 2. Our other notes payable are not actively traded, and their fair value is not solely derived from readily observable inputs. The fair value of our other notes payable is determined based on a discounted cash flow model and other proprietary valuation methods, and therefore is classified as Level 3. See Note 4 for further information on our long-term debt.

The discount rates used as significant unobservable inputs in the Level 3 fair value measurements of our contingent acquisition obligations and long-term debt as of December 31, 2023 ranged from 3.0% to 6.0%.

Non-financial Instruments that are Measured at Fair Value on a Nonrecurring Basis

Certain non-financial assets and liabilities are measured at fair value on a nonrecurring basis, primarily goodwill (Level 3), intangible assets, and property and equipment. Accordingly, these assets are not measured and adjusted to fair value on an ongoing basis but are subject to periodic evaluations for potential impairment.

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Employee Benefits (Notes)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Employee Benefits

Employee Benefits

Pension and Postretirement Benefit

We have a defined benefit pension plan covering certain U.S. employees (the “Domestic Pension Plan”) that consists of approximately 2,700 participants and is closed to new participants. We also have numerous funded and unfunded plans outside the U.S. The Interpublic Limited Pension Plan in the U.K. (the "U.K. Pension Plan") is a defined benefit plan and is our most material foreign pension plan in terms of the benefit obligation and plan assets. Some of our domestic and foreign subsidiaries provide postretirement health benefits and life insurance to eligible employees and, in certain cases, their dependents. The domestic postretirement benefit plan is our most material postretirement benefit plan in terms of the benefit obligation. This plan consists of approximately 1,400 participants, is closed to new participants and is unfunded.

Differences between the aggregate income statement and balance sheet amounts listed in the tables below and the totals reported in our Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income and Consolidated Balance Sheets relate to non-material foreign pension and postretirement benefit plans.

In December 2023, the U. K .Pension Plan entered into an agreement with an insurance company to purchase a group annuity, or "buy-in", that matches the plans future projected benefit obligations to covered participants. Prior to the transaction, the Company contributed an incremental $46.0 to the U.K. Pension Plan. As part of the annuity purchase contract, the U.K. Pension Plan has the option to complete a "buy-out", which would transfer all liabilities of the plan to the insurer, which the Company anticipates to be completed in the next 12-18 months. The non-cash settlement charge, net of tax, associated with the transaction is currently estimated to be approximately $180.0 to $200.0.

Pension and Postretirement Benefit Obligation

The change in the benefit obligation, the change in plan assets, the funded status and amounts recognized for the Domestic Pension Plan, the significant foreign pension plans and the domestic postretirement benefit plan are listed below.

	Domestic Pension Plan				Foreign Pension Plans				Domestic Postretirement Benefit Plan
	2023		2022		2023		2022		2023		2022
Benefit Obligation
Projected benefit obligation as of January 1	$	75.0	$	104.1	$	334.2	$	546.0	$	17.9	$	24.2
Service cost	0.0		0.0		2.2		4.6		0.0		0.0
Interest cost	4.0		2.8		15.6		8.9		0.9		0.6
Benefits paid	(8.2)		(9.0)		(18.9)		(20.9)		(5.1)		(4.8)
Plan participant contributions	0.0		0.0		0.0		0.0		1.8		1.9
Actuarial (gains) losses	1.0		(23.0)		6.8		(153.3)		0.6		(4.0)
Settlements	0.0		0.0		(2.5)		0.0		0.0		0.0
Plan amendments	0.0		0.1		0.0		0.0		0.0		0.0
Foreign currency effect	0.0		0.0		17.4		(51.1)		0.0		0.0
Projected benefit obligation as of December 31	$	71.8	$	75.0	$	354.8	$	334.2	$	16.1	$	17.9
Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	70.5	$	98.1	$	297.1	$	484.8	$	0.0	$	0.0
Actual return on plan assets	6.7		(18.6)		5.3		(134.8)		0.0		0.0
Employer contributions	0.0		0.0		61.4		16.4		3.3		2.9
Plan participant contributions	0.0		0.0		0.0		0.0		1.8		1.9
Benefits paid	(8.2)		(9.0)		(18.9)		(20.9)		(5.1)		(4.8)
Settlements	0.0		0.0		(2.5)		0.0		0.0		0.0
Foreign currency effect	0.0		0.0		17.3		(48.4)		0.0		0.0
Fair value of plan assets as of December 31	$	69.0	$	70.5	$	359.7	$	297.1	$	0.0	$	0.0
Funded status of the plans at December 31	$	(2.8)	$	(4.5)	$	4.9	$	(37.1)	$	(16.1)	$	(17.9)

	Domestic Pension Plan				Foreign Pension Plans				Domestic Postretirement Benefit Plan
December 31,	2023		2022		2023		2022		2023		2022
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0	$	0.0	$	59.8	$	17.8	$	0.0	$	0.0
Current liability	0.0		0.0		(7.0)		(5.1)		(1.9)		(2.0)
Non-current liability	(2.8)		(4.5)		(47.9)		(49.8)		(14.2)		(15.9)
Net liability recognized	$	(2.8)	$	(4.5)	$	4.9	$	(37.1)	$	(16.1)	$	(17.9)
Accumulated benefit obligation	$	71.8	$	75.0	$	351.2	$	328.2
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	$	41.1	$	44.4	$	157.7	$	134.6	$	1.7	$	1.1
Prior service cost (credit)	0.0		0.1		0.4		0.6		0.0		0.0
Total amount recognized	$	41.1	$	44.5	$	158.1	$	135.2	$	1.7	$	1.1

Actuarial losses of $1.0 for the Domestic Pension Plan are attributed to a decrease in the discount rate from 5.65% as of December 31, 2022 to 5.40% as of December 31, 2023 and changes in demographic experience. Actuarial losses of $6.8 for the foreign pension plans are attributed to a decrease in the weighted-average discount rate from 4.62% as of December 31, 2022 to 4.32% as of December 31, 2023 and changes in demographic experience.

	Domestic Pension Plan				Foreign Pension Plans
December 31,	2023		2022		2023		2022
Pension plans with an accumulated benefit obligation in excess of plan assets
Aggregate projected benefit obligation	$	71.8	$	75.0	$	55.8	$	67.4
Aggregate accumulated benefit obligation	71.8		75.0		53.7		62.4
Aggregate fair value of plan assets	69.0		70.5		1.0		12.5

	Domestic Pension Plan				Foreign Pension Plans
December 31,	2023		2022		2023		2022
Pension plans with a projected benefit obligation in excess of plan assets
Aggregate projected benefit obligation	$	71.8	$	75.0	$	66.0	$	67.4
Aggregate accumulated benefit obligation	71.8		75.0		63.5		62.4
Aggregate fair value of plan assets	69.0		70.5		11.1		12.5

Net Periodic Cost

The components of net periodic benefit cost and key assumptions are listed below.

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Service cost	$	0.0	$	0.0	$	0.0	$	2.2	$	4.6	$	4.5	$	0.0	$	0.0	$	0.0
Interest cost	4.0		2.8		2.9		15.6		8.9		8.0		0.9		0.6		0.7
Expected return on plan assets	(4.0)		(4.7)		(5.6)		(17.0)		(19.8)		(20.8)		0.0		0.0		0.0
Curtailment and settlement	0.0		0.0		1.5		(0.3)		0.0		(0.9)		0.0		0.0		0.0
Amortization of:
Prior service cost (credit)	0.1		0.0		0.0		0.1		0.1		0.1		0.0		0.0		0.0
Net actuarial losses	1.6		1.4		1.7		5.0		4.4		6.7		0.0		0.4		0.9
Net periodic cost	$	1.7	$	(0.5)	$	0.5	$	5.6	$	(1.8)	$	(2.4)	$	0.9	$	1.0	$	1.6

Assumptions

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Net periodic cost
Discount rate	5.65	%	2.95	%	2.60	%	4.62	%	1.86	%	1.35	%	5.65	%	2.90	%	2.50	%
Rate of compensation increase	N/A		N/A		N/A		2.80	%	2.65	%	2.47	%	N/A		N/A		N/A
Expected return on plan assets	6.00	%	5.00	%	5.75	%	5.62	%	4.47	%	4.47	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Benefit obligation
Discount rate	5.40	%	5.65	%	2.95	%	4.32	%	4.62	%	1.86	%	5.40	%	5.65	%	2.90	%
Rate of compensation increase	N/A		N/A		N/A		3.35	%	2.80	%	2.65	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Healthcare cost trend rate assumed for next year
Initial rate (weighted-average)													6.50	%	6.75	%	6.50	%
Year ultimate rate is reached													2030		2030		2028
Ultimate rate													5.00	%	5.00	%	5.00	%

Discount Rates – At December 31, 2023, 2022 and 2021, we determined our discount rates for our domestic pension plan, foreign pension plans and domestic postretirement benefit plan based on either a bond selection/settlement approach or bond yield curve approach. Using the bond selection/settlement approach, we determine the discount rate by selecting a portfolio of corporate bonds appropriate to provide for the projected benefit payments. Using the bond yield curve approach, we determine the discount rate by matching the plans' cash flows to spot rates developed from a yield curve. Both approaches utilize high-quality AA-rated corporate bonds and the plans' projected cash flows to develop a discounted value of the benefit payments, which is then used to develop a single discount rate. In countries where markets for high-quality long-term AA corporate bonds are not well developed, a portfolio of long-term government bonds is used as a basis to develop hypothetical corporate bond yields, which serve as a basis to derive the discount rate.

Expected Return on Assets – Our expected rate of return is determined at the beginning of each year and considers asset class index returns over various market and economic conditions, current and expected market conditions, risk premiums associated with asset classes and long-term inflation rates. We determine both a short-term and long-term view and then select a long-term rate of return assumption that matches the duration of our liabilities.

Fair Value of Pension Plan Assets

The following table presents the fair value of our domestic and foreign pension plan assets as of December 31, 2023 and 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. See Note 13 for a description of the fair value hierarchy.

	December 31, 2023								December 31, 2022
Plan assets subject to fair value hierarchy	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Registered investment companies	$	6.7	$	0.0	$	0.0	$	6.7	$	10.6	$	0.0	$	0.0	$	10.6
Limited partnerships	0.0		0.0		0.0		0.0		0.0		0.0		0.0		0.0
Fixed income securities	9.2		0.0		0.0		9.2		12.5		0.0		0.0		12.5
Insurance contracts	0.0		1.4		334.4		335.8		0.0		1.6		0.0		1.6
Other	10.7		0.0		0.0		10.7		11.9		0.0		0.0		11.9
Total plan assets, subject to leveling	$	26.6	$	1.4	$	334.4	$	362.4	$	35.0	$	1.6	$	—	$	36.6
Other Plan Assets
Other investments measured at net asset value 1							106.5								331.0
Non-benefit obligation liabilities							(40.2)								0.0
Total plan assets							$	428.7							$	367.6

1Certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy but are included to reconcile to the amounts presented in the fair value of plan assets table above.

Registered investment companies, which are publicly traded, are primarily valued using recently reported sales prices. Limited partnerships are invested primarily in equity and fixed income securities. Fixed income securities include government and investment-grade corporate bonds. Insurance contracts are valued based on the cash surrender value of the contract. Other investments primarily include cash and cash equivalents, equity securities and derivatives. Other investments measured at net asset value include common/collective trusts, hedge funds and other commingled assets that are invested primarily in equity and fixed income securities. These investments are not publicly traded and are valued based on the net asset value of shares held by the plan at year end, which reflects the fair value of the underlying investments.

The following table presents additional information about our significant foreign pension plan assets for which we utilize Level 3 inputs to determine fair value.

	Years ended December 31,
Plan assets subject to fair value hierarchy, Level 3	2023		2022
Balance at beginning of period	$	0.0	$	24.0
Actual return on plan assets	19.9		(1.7)
Net purchases, sales and settlements	314.5		(22.3)
Balance at end of period	$	334.4	$	0.0

Asset Allocation

The primary investment goal for our plans’ assets is to maximize total asset returns while ensuring the plans’ assets are available to fund the plans’ liabilities as they become due. The plans’ assets in aggregate and at the individual portfolio level are invested so that total portfolio risk exposure and risk-adjusted returns best achieve this objective. The aggregate amount of our own stock held as investment for our domestic and foreign pension funds is considered negligible relative to the total fund assets. As of December 31, 2023, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.

			December 31,
Asset Class	2024 Target Allocation		2023		2022
Alternative investments 1	—	%	—	%	18	%
Equity securities	6	%	5	%	14	%
Fixed income securities	15	%	16	%	26	%
Insurance contracts	78	%	78	%	—	%
Liability driven investments 2	—	%	—	%	28	%
Real estate & Other	1	%	1	%	14	%
Total	100	%	100	%	100	%

1Alternative investments have the flexibility to dynamically invest across a broad range of asset classes including bonds, equity, cash, property and commodities.

2Liability driven investment strategies use government bonds as well as derivative instruments to hedge a portion of the impact of interest rates and inflation movements on the long-term liabilities.

Cash Flows

During 2023, we contributed $0.0 and $61.4 of cash to our domestic and foreign pension plans, respectively. For 2024, we expect to contribute approximately $0.0 and $10.0 of cash to our domestic and foreign pension plans, respectively.

The estimated future benefit payments expected to be paid are presented below.

Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2024	$	8.0	$	22.6	$	1.6
2025	7.2		22.0		1.5
2026	6.9		21.6		1.4
2027	6.9		21.1		1.7
2028	6.4		21.6		1.6
2029 - 2033	27.4		108.4		6.3

The estimated future payments for our domestic postretirement benefit plan are net of any estimated U.S. federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003, which total no more than $0.2 in any individual year.

Savings Plans

We sponsor defined contribution plans (the “Savings Plans”) that cover substantially all domestic employees. The Savings Plans permit participants to make contributions on a pre-tax and/or after-tax basis and allow participants to choose among various investment alternatives. We match a portion of participant contributions based upon their years of service. Amounts expensed for the Savings Plans for 2023, 2022 and 2021 were $62.8, $77.5 and $65.1, respectively. Expenses include a discretionary Company contribution of $0.0, $9.3 and $8.0 offset by participant forfeitures of $5.8, $6.3 and $8.5 in 2023, 2022 and 2021, respectively. In addition, we maintain defined contribution plans in various foreign countries and contributed $62.5, $58.2 and $59.7 to these plans in 2023, 2022 and 2021, respectively.

Deferred Compensation and Benefit Arrangements

We have deferred compensation and benefit arrangements which (i) permit certain of our key officers and employees to defer a portion of their salary or incentive compensation or (ii) require us to contribute an amount to the participant’s account. These arrangements may provide participants with the amounts deferred plus interest upon attaining certain conditions, such as

completing a certain number of years of service, attaining a certain age or upon retirement or termination. As of December 31, 2023 and 2022, the deferred compensation and deferred benefit liability balance was $126.5 and $141.1, respectively. Amounts expensed for deferred compensation and benefit arrangements in 2023, 2022 and 2021 were $10.7, $2.1 and $8.8, respectively.

We have purchased life insurance policies on participants' lives to assist in the funding of the related deferred compensation and deferred benefit liabilities. As of December 31, 2023 and 2022, the cash surrender value of these policies was $164.7 and $161.2, respectively.

Long-Term Disability Plan

We have a long-term disability plan which provides income replacement benefits to eligible participants who are unable to perform their job duties or any job related to his or her education, training or experience. As all income replacement benefits are fully insured, no related obligation is required as of December 31, 2023 and 2022. In addition to income replacement benefits, plan participants may remain covered for certain health and life insurance benefits up to normal retirement age, and accordingly, we have recorded an obligation of $5.3 and $5.4 as of December 31, 2023 and 2022, respectively.

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Segment Information (Notes)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Segment Information

Segment Information

As of December 31, 2023, we have three reportable segments: MD&E, IA&C and SC&E. We also report results for the "Corporate and other" group.

The MD&E segment provides, and is distinguished by innovative capabilities and scale in, global media and communications services, digital services and products, advertising and marketing technology, e‐commerce services, data management and analytics, strategic consulting, and digital brand experience. MD&E is comprised of IPG Mediabrands and Acxiom, as well as our digital and commerce specialist agencies, which include MRM, R/GA, and Huge.

The IA&C segment provides advertising, corporate and brand identity services, and strategic consulting. IA&C is distinguished by the leading role of complex integrations of ideation and the execution of advertising and creative campaigns across all communications channels that are foundational to client brand identities. IA&C is comprised of leading global networks and agencies that provide a broad range of services, including McCann Worldgroup, IPG Health, MullenLowe Group, Foote, Cone & Belding ("FCB"), and our domestic integrated agencies.

The SC&E segment provides best-in-class global public relations and other specialized communications services, events, sports and entertainment marketing, and strategic consulting. SC&E is comprised of agencies that provide a range of marketing services expertise, including Weber Shandwick, Golin, our sports, entertainment, and experiential agencies and IPG DXTRA Health.

All segments follow the same accounting policies as those described in Note 1.

Corporate and other is primarily comprised of selling, general and administrative expenses. Selling, general and administrative expenses includes corporate office expenses as well as shared service center and certain other centrally managed expenses that are not fully allocated to operating divisions; salaries, long-term incentives, annual bonuses and other miscellaneous benefits for corporate office employees; professional fees related to internal control compliance, financial statement audits and legal, information technology and other consulting services that are engaged and managed through the corporate office; and rental expense for properties occupied by corporate office employees. A portion of centrally managed expenses is allocated to operating divisions based on a formula that uses the planned revenues of each of the operating units. Amounts allocated also include specific charges for information technology-related projects, which are allocated based on utilization.

Certain prior period amounts, wherever applicable, have been recast to reflect the transfer of certain agencies between our reportable segments.

Summarized financial information concerning our reportable segments is shown in the following tables.

	Years ended December 31,
	2023		2022		2021
Total Revenue:
MD&E	$	4,394.8	$	4,381.6	$	4,196.6
IA&C	4,002.2		4,140.6		4,041.8
SC&E	2,492.3		2,405.6		2,002.3
Total	$	10,889.3	$	10,927.8	$	10,240.7
Revenue before billable expenses:
MD&E	$	4,326.5	$	4,296.9	$	4,117.7
IA&C	3,633.2		3,766.3		3,679.7
SC&E	1,440.9		1,386.2		1,310.5
Total	$	9,400.6	$	9,449.4	$	9,107.9
Restructuring:
MD&E	(1.3)		69.1		0.1
IA&C	0.2		28.7		2.6
SC&E	1.1		3.8		10.0
Corporate and other	0.1		0.8		(2.1)
Total	$	0.1	$	102.4	$	10.6
Segment EBITA1:
MD&E	$	832.4	$	744.5	$	865.3
IA&C	541.3		581.4		597.9
SC&E	265.2		234.5		188.6
Corporate and other	(72.3)		(94.5)		(129.4)
Total	$	1,566.6	$	1,465.9	$	1,522.4
Amortization of acquired intangibles:
MD&E	$	77.3	$	72.8	$	71.9
IA&C	4.3		7.2		10.4
SC&E	2.4		4.7		3.9
Corporate and other	0.0		0.0		0.0
Total	$	84.0	$	84.7	$	86.2
Depreciation and amortization2:
MD&E	$	105.8	$	107.4	$	108.0
IA&C	53.6		58.4		62.7
SC&E	15.9		16.9		17.7
Corporate and other	5.0		6.6		9.2
Total	$	180.3	$	189.3	$	197.6
Capital expenditures:
MD&E	$	100.1	$	97.4	$	99.7
IA&C	40.8		43.8		57.5
SC&E	6.4		7.3		8.1
Corporate and other	32.0		29.6		30.0
Total	$	179.3	$	178.1	$	195.3

1 Segment EBITA is calculated as net income available to IPG common stockholders before provision for income taxes, total (expenses) and other income, equity in net income of unconsolidated affiliates, net income attributable to non-controlling interests and amortization of acquired intangibles.

2 Excludes amortization of acquired intangibles.

	December 31,
	2023		2022
Total assets:
MD&E	$	10,715.4	$	9,984.3
IA&C	4,812.5		5,083.5
SC&E	1,800.6		1,629.9
Corporate and other	1,938.8		2,114.0
Total	$	19,267.3	$	18,811.7

The following table presents the reconciliation of segment EBITA to Income before income taxes.

	Years ended December 31,
	2023		2022		2021
MD&E EBITA	$	832.4	$	744.5	$	865.3
IA&C EBITA	541.3		581.4		597.9
SC&E EBITA	265.2		234.5		188.6
Corporate and other EBITA	(72.3)		(94.5)		(129.4)
Less: consolidated amortization of acquired intangibles	84.0		84.7		86.2
Operating income	1,482.6		1,381.2		1,436.2
Total (expenses) and other income	(74.6)		(112.3)		(214.1)
Income before income taxes	$	1,408.0	$	1,268.9	$	1,222.1

Long-lived assets, including operating lease right-of-use assets and excluding intangible assets, are presented by major geographic area in the following table.

	Long-Lived Assets
	December 31,
	2023		2022
Domestic	$	1,546.0	$	1,676.7
International:
United Kingdom	290.1		254.8
Continental Europe	84.7		87.6
Asia Pacific	163.2		176.5
Latin America	59.0		61.6
Other	84.3		88.9
Total International	681.3		669.4
Total Consolidated	$	2,227.3	$	2,346.1

Property and equipment are allocated based upon physical location. Other assets and investments are allocated based on the location of the related operations.

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Commitments and Contingencies (Notes)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Guarantees

We have guaranteed certain obligations of our subsidiaries relating principally to operating leases and uncommitted lines of credit of certain subsidiaries. As of December 31, 2023 and December 31, 2022, the amount of parent company guarantees on lease obligations was $678.1 and $797.3, respectively, the amount of parent company guarantees primarily relating to uncommitted lines of credit was $255.7 and $276.4, respectively, and the amount of parent company guarantees related to daylight overdrafts, primarily utilized to manage intra-day overdrafts due to timing of transactions under cash pooling arrangements without resulting in incremental borrowings, was $85.5 and $101.3, respectively. In the event of non-payment by the applicable subsidiary of the obligations covered by a guarantee, we would be obligated to pay the amounts covered by that guarantee. As of both December 31, 2023 and December 31, 2022, there were no material assets pledged as security for such parent company guarantees.

Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2023.

	2024		2025		2026		2027		2028		Thereafter		Total
Deferred acquisition payments	$	2.9	$	0.1	$	0.1	$	0.0	$	0.0	$	0.0	$	3.1
Redeemable non-controlling interests and call options with affiliates 1	9.7		17.4		19.9		28.7		0.0		0.0		75.7
Total contingent acquisition payments	$	12.6	$	17.5	$	20.0	$	28.7	$	0.0	$	0.0	$	78.8

1We have entered into certain acquisitions that contain both redeemable non-controlling interests and call options with similar terms and conditions. The estimated amounts listed would be paid in the event of exercise at the earliest exercise date. We have certain redeemable non-controlling interests that are exercisable at the discretion of the non-controlling equity owners as of December 31, 2023. These estimated payments of $1.4 are included within the total payments expected to be made in 2024, and will continue to be carried forward into 2025 or beyond until exercised or expired. Redeemable non-controlling interests are included in the table at current exercise price payable in cash, not at applicable redemption value, in accordance with the authoritative guidance for classification and measurement of redeemable securities.

The majority of these payments are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revision in accordance with the terms of the respective agreements. See Note 6 for further information relating to the payment structure of our acquisitions.

Legal Matters

We are involved in various legal proceedings, and subject to investigations, inspections, audits, inquiries and similar actions by governmental authorities arising in the normal course of business. The types of allegations that arise in connection with such legal proceedings vary in nature, but can include claims related to contract, employment, tax and intellectual property matters. We evaluate all cases each reporting period and record liabilities for losses from legal proceedings when we determine that it is probable that the outcome in a legal proceeding will be unfavorable and the amount, or potential range, of loss can be reasonably estimated. In certain cases, we cannot reasonably estimate the potential loss because, for example, the litigation is in its early stages. While any outcome related to litigation or such governmental proceedings in which we are involved cannot be predicted with certainty, management believes that the outcome of these matters, individually and in the aggregate, will not have a material adverse effect on our financial condition, results of operations or cash flows.

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Recent Accounting Standards (Notes)

12 Months Ended

Dec. 31, 2023

Accounting Standards Update and Change in Accounting Principle [Abstract]

Recent Accounting Standards

Recent Accounting Standards

Accounting pronouncements not listed below were assessed and determined to be not applicable or are expected to have minimal impact on our Consolidated Financial Statements.

Income Taxes

In December 2023, the Financial Accounting Standards Board issued amended guidance to enhance the transparency and decision usefulness of income tax disclosures by requiring disaggregated information about an entity's effective tax rate reconciliation, as well as information on taxes paid. This amended guidance is effective for annual periods beginning after December 15, 2024. We are currently evaluating the impact on our Consolidated Financial Statements.

Segment Reporting

In November 2023, the Financial Accounting Standards Board issued amended guidance on segment reporting to improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analysis. This amended guidance is effective for annual periods beginning after December 15, 2023 and interim periods beginning after December 15, 2024. We are currently evaluating the impact on our Consolidated Financial Statements.

Derivatives and Hedging

In March 2022, the Financial Accounting Standards Board issued amended guidance on hedge accounting which allows nonprepayable financial assets to be included in a closed portfolio hedge using the portfolio layer method, allowing for more consistent accounting over prepayable and nonprepayable hedges. The new guidance also allows multiple hedged layers to be designated for a single closed portfolio, further aligning hedge accounting with risk management strategies. We adopted the standard January 1, 2023, which did not have a significant impact on our Consolidated Financial Statements.

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Subsequent Events (Notes)

12 Months Ended

Dec. 31, 2023

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

We announced on February 8, 2024 that our Board had declared a common stock cash dividend of $0.330 per share, payable on March 15, 2024 to holders of record as of the close of business on March 1, 2024.

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Significant Accounting Policies Basis of Presentation (Policies)

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Basis of Presentation

We conduct our business across three reportable segments described in Note 15. The three reportable segments are: Media, Data & Engagement Solutions ("MD&E"), Integrated Advertising & Creativity Led Solutions ("IA&C"), and Specialized Communications & Experiential Solutions ("SC&E").

Cost of services is comprised of the expenses of our revenue-producing operating segments including salaries and related expenses, office and other direct expenses and billable expenses, as well as an allocation of the centrally managed expenses from Corporate and other. Office and other direct expenses include rent expense, professional fees, certain expenses incurred by our staff in servicing our clients and other costs directly attributable to client engagements.

Selling, general and administrative expenses are primarily the unallocated expenses from Corporate and other, as disclosed further in Note 15, excluding depreciation and amortization.

Depreciation and amortization of the fixed assets and intangible assets of the Company is disclosed as a separate operating expense.

Restructuring charges relate to the Company's implementation of cost initiatives to better align our cost structure with our revenue, as discussed further in Note 11.

Lessee, Leases [Policy Text Block]

Leases

As of December 31, 2023, we do not have a material amount of finance leases and the majority of our operating leases, for which we serve as the lessee, consist primarily of real-estate property for our offices around the world. Both the right-of-use asset and lease liability are measured at the present value of the future lease payments, with the asset being subject to adjustments such as initial direct costs, prepaid lease payments, and lease incentives. Many of our leases provide for renewal and/or termination options, as well as escalation clauses, which are also factored into our lease payments when appropriate. The discount rate used to measure the lease asset and liability is determined at the beginning of the lease term using the rate implicit in the lease, if readily determinable, or using the Company's collateralized credit-adjusted borrowing rate.

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Significant Accounting Policies Principles of Consolidation (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Principles of Consolidation

Principles of Consolidation

The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but have the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are recorded at cost, less any impairment, adjusted for subsequent observable price changes. All intercompany accounts and transactions have been eliminated in consolidation.

We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

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Significant Accounting Policies Reclassifications (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Reclassifications

Reclassifications

Certain reclassifications and immaterial adjustments have been made to prior-period financial statements to conform to the current-period presentation. Additionally, certain prior period amounts, wherever applicable, have been recast to reflect the transfer of certain agencies between reportable segments.

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Significant Accounting Policies Use of Estimates (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates under different assumptions or conditions. A further decline in macroeconomic conditions or increasing interest rates could have a negative impact on these estimates, including the fair value of certain estimates.

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Significant Accounting Policies Revenue Recognition (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Revenue Recognition

Revenue Recognition

Our revenues are primarily derived from the planning and execution of multi-channel advertising and communications, marketing services, including public relations, meeting and event production, sports and entertainment marketing, corporate and brand identity, strategic marketing consulting, and providing marketing data and technology services around the world.

Most of our client contracts are individually negotiated and, accordingly, the terms of client engagements and the basis on which we earn fees and commissions vary significantly. Our contracts generally provide for termination by either party on relatively short notice, usually 30 to 90 days, although our data management contracts typically have non-cancelable terms of

more than one year. Our payment terms vary by client, and the time between invoicing date and due date is typically not significant. We generally have the legally enforceable right to payment for all services provided through the end of the contract or termination date.

We recognize revenue when we determine our customer obtains control of promised goods or services, in an amount that reflects the consideration which we expect to receive in exchange for those goods or services. To determine revenue recognition, we perform the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue as or when we satisfy the performance obligation. We only apply the five-step model to contracts when it is probable that IPG will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, we assess the goods or services promised within each contract and determine those that are distinct performance obligations. We then assess whether we act as an agent or a principal for each identified performance obligation and include revenue within the transaction price for third-party costs when we determine that we act as principal. We typically do not capitalize costs to obtain a contract as these amounts would generally be recognized over a period of one year or less.

Revenue before billable expenses, primarily consisting of fees, commissions and performance incentives, represents the amount of our gross billings excluding billable expenses charged to a client. Generally, our compensation is based on a negotiated fixed price, rate per hour, a retainer, commission or volume. The majority of our fees are recognized over time as services are performed, either utilizing a function of hours incurred and rates per hour, as compared to periodically updated estimates to complete, or ratably over the term of the contract. For certain less-frequent commission-based contracts which contain clauses allowing our clients to terminate the arrangement at any time for no compensation, revenue is recognized at a point in time, typically the date of broadcast or publication. We report revenue net of taxes assessed by governmental authorities that are directly imposed on our revenue-producing transactions.

Contractual arrangements with clients may also include performance incentive provisions designed to link a portion of our revenue to our performance relative to mutually agreed-upon qualitative and/or quantitative metrics. Performance incentives are treated as variable consideration which is estimated at contract inception and included in revenue based on the most likely amount earned out of a range of potential outcomes. Our estimates are based on a combination of historical award experience, anticipated performance and our best judgment. These estimates are updated on a periodic basis and are not expected to result in a reversal of a significant amount of the cumulative revenue recognized.

The predominant component of billable expenses are third-party vendor costs incurred for performance obligations where we have determined that we are acting as principal. These third-party expenses are generally billed back to our clients. Billable expenses also includes incidental costs incurred in the performance of our services including airfare, mileage, hotel stays, out-of-town meals and telecommunication charges. We record these billable expenses within total revenue with a corresponding offset to operating expenses.

In international markets, we may receive rebates or credits from vendors based on transactions entered into on behalf of clients. Rebates and credits are remitted back to our clients in accordance with our contractual requirements or may be retained by us based on the terms of a particular client contract and local law. Amounts owed back to clients are recorded as a liability and amounts retained by us are recorded as revenue when earned.

In certain international markets, our media contracts may allow clients to terminate our arrangement at any time for no compensation to the extent that media has not yet run. For those contracts, we do not recognize revenue until the media runs which is the point in time at which we have a legally enforceable right to compensation.

In the normal course of business, certain agencies may enter into agreements with media suppliers to purchase an agreed value of media within a fixed timeframe. By entering into these agreements, the agency is taking a risk and may be required to pay a portion or all of the agreed value ahead of media being run. In order to participate in these arrangements and receive an agreed additional benefit from the agency, clients are required to contractually opt in.

Performance Obligations

Our client contracts may include various goods and services that are capable of being distinct, are distinct within the context of the contract and are therefore accounted for as separate performance obligations. We allocate revenue to each performance obligation in the contract at inception based on its relative standalone selling price.

Our advertising businesses include a wide range of services that involve the creation of an advertising idea, concept, campaign, or marketing strategy in order to promote the client’s brand ("creative services"), and to act as an agent to facilitate the production of advertisements by third-party suppliers ("production services”). Our clients can contract us to perform one or both of these services, as they can derive stand-alone benefit from each. Production services can include formatting creative material for different media and communication mediums including digital, large-scale reproduction such as printing and

adaptation services, talent engagement and acquisition, television and radio production, and outdoor billboard production. Our contracts that include both services are typically explicit in the description of which activities constitute the creative advertising services and those that constitute the production services. Both the creative and production services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our advertising contracts.

Our media businesses include services to formulate strategic media plans ("media planning services") and to act as an agent to purchase media (e.g. television and radio spots, outdoor advertising, digital banners, etc.) from vendors on our clients' behalf ("media buying services"). Our contracts that include both services are typically explicit in the description of which activities constitute the planning services and those that constitute the buying services. Both the planning and buying services are sold separately, the client can derive utility from each service on its own, we do not provide a significant service of integrating these activities into a bundle, the services do not significantly modify one another, and the services are not highly interrelated or interdependent. As such, we typically identify two performance obligations in the assessment of our media contracts.

Our events businesses include creative services related to the conception and planning of custom marketing events as well as activation services which entail the carrying out of the event, including, but not limited to, set-up, design and staffing. Additionally, our public relations businesses include a broad range of services, such as strategic planning, social media strategy and the monitoring and development of communication strategies, among others. While our contracts in these businesses may include some or all of these services, we typically identify only one performance obligation in the assessment of our events and public relations contracts as we provide a significant service of integrating the individual services into a combined service for which the customer has contracted.

Our data and technology services businesses include data management, data and data strategy, identity resolution, and measurement and analytics products and services. While our contracts in these businesses may include some or all of these services, we typically identify each product and service as an individual performance obligation.

We have elected not to disclose information about remaining performance obligations that have original expected durations of one year or less. The majority of our contracts are for periods of one year or less with the exception of our data management contracts.

Principal vs. Agent

When a third-party is involved in the delivery of our services to the client, we assess whether or not we are acting as a principal or an agent in the arrangement. The assessment is based on whether we control the specified services at any time before they are transferred to the customer. We have determined that in our events and public relations businesses, we generally act as a principal as our agencies provide a significant service of integrating goods or services provided by third parties into the specified deliverable to our clients. In addition, we have determined that we are responsible for the performance of the third-party suppliers, which are combined with our own services, before transferring those services to the customer. We have also determined that we act as principal when providing creative services and media planning services, as we perform a significant integration service in these transactions. For performance obligations in which we act as principal, we record the gross amount billed to the customer within total revenue and the related incremental direct costs incurred as billable expenses.

In the vast majority of our business, when a third-party is involved in the production of an advertising campaign and for media buying services, we have determined that we act as the agent and are solely arranging for the third-party suppliers to provide services to the customer. Specifically, we do not control the specified services before transferring those services to the customer, we are not primarily responsible for the performance of the third-party services, nor can we redirect those services to fulfill any other contracts. We do not have inventory risk or discretion in establishing pricing in our contracts with customers. For performance obligations for which we act as the agent, we record our revenue as the net amount of our gross billings less amounts remitted to third parties.

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Significant Accounting Policies Cash and Cash Equivalents (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

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Significant Accounting Policies Allowance for Doubtful Accounts (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Allowance for Doubtful Accounts

Allowance for Expected Credit Losses

The allowance for credit losses on expected future uncollectible accounts receivable is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

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Significant Accounting Policies Acounts Receivable, Billable to Clients (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Accounts Receivable, Billable to Clients

Accounts Receivable, Billable to Clients

Accounts receivable, billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in accounts receivable, billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

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Significant Accounting Policies Accounts Payable (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Accounts Payable

Accounts Payable

Accounts payable includes all operating payables, including those related to all media and production costs. These payables are due within one year.

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Significant Accounting Policies Investments (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Investments

Investments

Equity investments with readily determinable fair values, other than those accounted for using the equity method of accounting, will be measured at fair value. We regularly review our investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment, with changes to fair value recorded in earnings. We evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if a decline in value of an investment has occurred.

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Significant Accounting Policies Derivatives (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Derivatives

Derivatives

We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the changes in the fair value of the derivative are recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings. If a derivative is a net investment hedge, then the changes in the fair value of the derivative are recognized in other comprehensive income in the same period as the change in fair value of the underlying hedged foreign investment.

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Significant Accounting Policies Property and Equipment (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Property and Equipment

Property and Equipment

Furniture, equipment, leasehold improvements and buildings are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture and equipment, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements. Land is stated at cost and is not depreciated.

We capitalize certain internal and external costs incurred to acquire or create internal use software, principally related to our enterprise resource planning (“ERP”) systems. Our ERP systems are stated at cost, net of accumulated amortization, and are amortized using the straight-line method over 10 years. All other internal use computer software are stated at cost, net of accumulated amortization and are amortized using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years.

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Significant Accounting Policies Goodwill and Other Intangible Assets (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of

future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

We review goodwill as of October 1st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 10 reporting units that were subject to the 2023 annual impairment testing. Our annual impairment review as of October 1, 2023 did not result in an impairment charge for any of our reporting units.

Intangible assets with indefinite useful lives are not amortized but are evaluated for impairment annually or more frequently if events or changes in circumstances indicate that impairment may exist. The Company first assesses qualitative factors to determine whether it is necessary to perform a quantitative impairment test for indefinite-lived intangible assets. Impairment exists if the fair value of the indefinite-lived intangible asset is less than the carrying value. The determination of fair value is based on the relief from royalty method of the income approach, which models the cash flows from indefinite-lived intangibles assuming royalties were received under a licensing arrangement. This discounted cash flow analysis includes assumptions related to forecasted future revenues attributable to indefinite-lived intangibles, royalty rates and risk-adjusted discount rates. If the carrying value of an indefinite-lived intangible asset exceeds its estimated fair value, the indefinite-lived intangible asset is considered impaired, and an impairment loss will be recognized in an amount equal to the excess of the carrying value over the fair value. Based on this analysis, for the indefinite lived-intangible asset for which we performed a quantitative impairment test as of October 1, 2023, we concluded that it was not impaired because its fair value was in excess of its carrying value.

For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The sum of the fair values of all our reporting units is also reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the quantitative impairment test is failed and impaired goodwill is written down to its fair value with a charge to expense in the period the impairment is identified.

The fair value of each reporting unit for 2023 and 2022 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data.

We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these asset groups. These asset groups are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

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Significant Accounting Policies Foreign Currencies (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Foreign Currencies

Foreign Currencies

The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax loss of $5.7 for the year ended December 31, 2023, a pre-tax gain of $2.5 for the year ended December 31, 2022, and a pre-tax loss of $5.0 for the year ended December 31, 2021.

We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country is changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses are recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

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Significant Accounting Policies Income Taxes (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Income Taxes

Income Taxes

The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. The factors used in assessing valuation allowances include all available evidence, such as past operating results, estimates of future taxable income and the feasibility of tax planning strategies. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

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Significant Accounting Policies Redeemable Noncontrolling Interests (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Redeemable Noncontrolling Interests

Redeemable Non-controlling Interests

Many of our acquisitions include provisions under which the non-controlling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable non-controlling interests may be contingent on projected operating performance and satisfying other conditions specified in the related agreements. These payments are also subject to revision in accordance with the terms of the agreements. We record these redeemable non-controlling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable non-controlling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings but will not impact net income. Adjustments as a result of currency translation will affect the redeemable non-controlling interest balance, but do not impact retained earnings or additional paid-in capital.

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Significant Accounting Policies Earnings Per Share (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Earnings Per Share

Earnings Per Share (“EPS”)

Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued.

Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities were exercised. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation.

We may be required to calculate basic EPS using the two-class method as a result of our redeemable non-controlling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable non-controlling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2023, 2022 and 2021, there was no impact to EPS for adjustments related to our redeemable non-controlling interests.

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Significant Accounting Policies Pension and Postretirement Benefits (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Pension and Postretirement Benefits

Pension and Postretirement Benefits

We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

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Significant Accounting Policies Stock-Based Compensation (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Stock-Based Compensation

Stock-Based Compensation

Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

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Significant Accounting Policies Treasury Stock (Policies)

12 Months Ended

Dec. 31, 2023

Treasury Stock, Shares [Abstract]

Treasury Stock [Text Block]

Treasury Stock

We account for repurchased common stock under the cost method and include such treasury stock as a component of our Consolidated Statements of Stockholders' Equity. Upon retirement, we reduce common stock for the par value of the shares being retired and the excess of the cost of the shares over par value as a reduction to APIC, to the extent there is APIC in the same class of stock, and any remaining amount to retained earnings. These retired shares remain authorized but unissued.

In October 2023, we retired 9.3 shares of our treasury stock, which resulted in a reduction in common stock of $0.9, treasury stock of $340.4 and APIC of $339.5. In October 2022, we retired 7.2 shares of our treasury stock, which resulted in a reduction in common stock of $0.7, treasury stock of $199.9 and APIC of $199.2. During 2021, there was no significant treasury stock activity due to the suspension of the share repurchase program.

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Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Geographic Areas [Table Text Block]

	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	7,033.1	$	7,031.0	$	6,360.2
International:
United Kingdom	891.5		902.7		880.5
Continental Europe	901.3		867.5		892.8
Asia Pacific	868.3		918.5		970.1
Latin America	477.0		454.9		430.3
Other	718.1		753.2		706.8
Total International	3,856.2		3,896.8		3,880.5
Total Consolidated	$	10,889.3	$	10,927.8	$	10,240.7

	Years ended December 31,
Revenue before billable expenses:	2023		2022		2021
United States	$	6,102.2	$	6,157.7	$	5,763.1
International:
United Kingdom	759.2		742.2		781.5
Continental Europe	795.7		764.6		799.7
Asia Pacific	729.8		772.7		791.4
Latin America	448.7		423.6		396.4
Other	565.0		588.6		575.8
Total International	3,298.4		3,291.7		3,344.8
Total Consolidated	$	9,400.6	$	9,449.4	$	9,107.9

MD&E	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	2,731.4	$	2,730.2	$	2,584.7
International	1,663.4		1,651.4		1,611.9
Total MD&E	$	4,394.8	$	4,381.6	$	4,196.6
Revenue before billable expenses:
United States	$	2,703.5	$	2,690.9	$	2,552.0
International	1,623.0		1,606.0		1,565.7
Total MD&E	$	4,326.5	$	4,296.9	$	4,117.7

IA&C	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	2,508.8	$	2,585.9	$	2,403.3
International	1,493.4		1,554.7		1,638.5
Total IA&C	$	4,002.2	$	4,140.6	$	4,041.8
Revenue before billable expenses:
United States	$	2,383.8	$	2,483.7	$	2,306.0
International	1,249.4		1,282.6		1,373.7
Total IA&C	$	3,633.2	$	3,766.3	$	3,679.7

SC&E	Years ended December 31,
Total revenue:	2023		2022		2021
United States	$	1,792.9	$	1,714.9	$	1,372.2
International	699.4		690.7		630.1
Total SC&E	$	2,492.3	$	2,405.6	$	2,002.3
Revenue before billable expenses:
United States	$	1,014.9	$	983.1	$	905.1
International	426.0		403.1		405.4
Total SC&E	$	1,440.9	$	1,386.2	$	1,310.5

Contract with Customer, Asset and Liability [Table Text Block]

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers.

	December 31, 2023		December 31, 2022
Accounts receivable, net of allowance of $46.4 and $48.6, respectively	$	5,768.8	$	5,316.0
Accounts receivable, billable to clients	2,229.2		2,023.0
Contract assets	68.6		67.4
Contract liabilities (deferred revenue)	684.7		680.0

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Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Lease, Cost [Table Text Block]

The following tables present information on our operating leases for the full years of 2023, 2022 and 2021.

	Years ended December 31,
	2023			2022			2021
Operating lease cost	$	268.4		$	290.7		$	306.0
Short-term lease cost	7.9			6.4			8.1
Sublease income	(26.4)			(23.8)			(21.1)
Total lease cost	$	249.9		$	273.3		$	293.0
Cash paid related to operating lease liabilities	$	299.5		$	320.9		$	347.6
Right-of-use assets obtained in exchange for lease liabilities	$	83.0		$	93.0		$	431.0
	As of December 31,
	2023			2022			2021
Weighted-average remaining lease term	Seven years			Eight years			Eight years
Weighted-average discount rate	3.63		%	3.51		%	3.45		%

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Our future payments of our operating leases as of December 31, 2023 are listed in the table below.

Period	Payments
2024	$	299.6
2025	270.1
2026	249.8
2027	215.4
2028	170.9
Thereafter	458.4
Total future lease payments	1,664.2
Less: imputed interest	194.8
Present value of future lease payments	1,469.4
Less: current portion of operating leases	252.6
Non-current operating leases	$	1,216.8

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Debt and Credit Agreements Schedule of Long-term Debt Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

A summary of the carrying amounts of our long-term debt is listed below.

	Effective Interest Rate		December 31,
			2023 1		2022 1
4.200% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.0 and $0.1, respectively)	4.240	%	$	249.9	$	249.7
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $0.9 and $2.1, respectively)	4.780	%	497.0		496.4
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $2.6 and $3.8, respectively)	4.920	%	643.6		642.6
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.7 and $3.3, respectively)	2.512	%	496.0		495.5
5.375% Senior Notes due 2033 (less unamortized discount and issuance costs of $3.6 and $3.0, respectively)	5.650	%	293.4		—
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $0.9 and $5.0, respectively)	3.448	%	494.1		493.7
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.6 and $4.6, respectively)	5.480	%	492.8		492.6
Other notes payable and capitalized leases			0.8		0.8
Total long-term debt			3,167.6		2,871.3
Less: current portion			250.1		0.6
Long-term debt, excluding current portion			$	2,917.5	$	2,870.7

1See Note 13 for information on the fair value measurement of our long-term debt.

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Debt and Credit Agreements Schedule of Maturities of Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2023

Long-Term Debt, Fiscal Year Maturity [Abstract]

Schedule of Maturities of Long-term Debt [Table Text Block]

Annual maturities are scheduled as follows based on the book value as of December 31, 2023.

2024	$	250.1
2025	0.2
2026	0.2
2027	0.1
2028	497.0
Thereafter	2,420.0
Total long-term debt	$	3,167.6

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Earnings Per Share Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.

	Years ended December 31,
	2023		2022		2021
Net income available to IPG common stockholders	$	1,098.4	$	938.0	$	952.8
Weighted-average number of common shares outstanding - basic	384.1		391.5		393.0
Dilutive effect of stock options and restricted shares	1.8		3.6		5.4
Weighted-average number of common shares outstanding - diluted	385.9		395.1		398.4
Earnings per share available to IPG common stockholders:
Basic	$	2.86	$	2.40	$	2.42
Diluted	$	2.85	$	2.37	$	2.39

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Acquisitions Cash Paid for Current and Prior Years' Acquisitions (Tables)

12 Months Ended

Dec. 31, 2023

Business Combinations [Abstract]

Cash Paid For Current And Prior Years' Acquisitions [Table Text Block]

Details of cash paid for current and prior years' acquisitions are listed below.

	Years ended December 31,
	2023		2022		2021
Cost of investment: current-year acquisitions	$	5.8	$	235.4	$	—
Cost of investment: prior-year acquisitions	16.6		9.3		28.0
Less: net cash acquired	3.2		3.2		—
Total cost of investment	19.2		241.5		28.0
Operating payments 1	2.7		9.6		39.1
Total cash paid for acquisitions 2	$	21.9	$	251.1	$	67.1

1Represents cash payments for amounts that have been recognized in operating expenses since the date of acquisition either relating to adjustments to estimates in excess of the initial value of contingent payments recorded or were contingent upon the future employment of the former owners of the acquired companies. Amounts are reflected in the operating section of the Consolidated Statements of Cash Flows.

2Of the total cash paid for acquisitions, $6.3, $232.2 and $0.0 for the years ended December 31, 2023, 2022 and 2021, respectively, are classified under the investing section of the Consolidated Statements of Cash Flows as acquisitions, net of cash acquired. These amounts relate to initial payments for new transactions, as well as adjustments made to upfront payments related to prior year acquisitions. Of the total cash paid for acquisitions, $12.9, $9.3 and $28.0 for the years ended December 31, 2023, 2022 and 2021, respectively, are classified under the financing section of the Consolidated Statements of Cash Flows as acquisition-related payments. These amounts relate to deferred payments and increases in our ownership interest for prior acquisitions.

Redeemable Noncontrolling Interest

The following table presents changes in our redeemable non-controlling interests.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	38.3	$	15.6	$	93.1
Change in related non-controlling interests balance	(0.3)		(0.5)		2.2
Changes in redemption value of redeemable non-controlling interests:
Additions	7.4		30.3		0.0
Redemptions and other	(0.4)		(9.9)		(41.9)
Redemption value adjustments	(2.6)		3.0		(32.1)
Currency translation adjustments	(0.1)		(0.2)		(5.7)
Balance at end of period	$	42.3	$	38.3	$	15.6

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Supplementary Data Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts (Tables)

12 Months Ended

Dec. 31, 2023

Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts [Abstract]

Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable

Valuation and Qualifying Accounts – Accounts Receivable, Allowance for Expected Credit Losses

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	48.6	$	68.5	$	98.3
Charges to costs and expenses 1	7.2		(5.8)		(14.9)
Adjustments:
(Dispositions)/Acquisitions	(1.7)		(0.9)		(3.2)
Uncollectible accounts written off	(7.8)		(12.8)		(9.8)
Recoveries	0.1		1.9		0.3
Foreign currency translation adjustments	0.0		(2.3)		(2.2)
Balance at end of period	$	46.4	$	48.6	$	68.5

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Supplementary Data Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and Equipment

	December 31,
	2023		2022
Furniture and equipment	$	632.8	$	640.8
Leasehold improvements	507.0		528.6
Internal-use computer software	585.1		581.4
Land and buildings	136.7		131.4
Gross property and equipment	1,861.6		1,882.2
Less: accumulated depreciation and amortization	(1,224.9)		(1,244.8)
Total property and equipment, net	$	636.7	$	637.4

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Supplementary Data Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Accrued Liabilities [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued Liabilities

The following table presents the components of accrued liabilities.

	December 31,
	2023		2022
Salaries, benefits and related expenses	$	507.5	$	554.0
Income taxes payable	56.8		64.7
Interest	40.2		37.3
Office and related expenses	22.3		28.9
Acquisition obligations	2.9		18.7
Restructuring charges	0.6		2.2
Other	75.5		81.3
Total accrued liabilities	$	705.8	$	787.1

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Supplementary Data Other Expense, Net (Tables)

12 Months Ended

Dec. 31, 2023

Other Nonoperating Income (Expense) [Abstract]

Schedule of Other Nonoperating Income (Expense) [Table Text Block]

Other Income (Expense), Net

Results of operations include certain items that are not directly associated with our revenue-producing operations.

	Years ended December 31,
	2023		2022		2021
Net gains/(losses) on sales of businesses	$	17.9	$	(11.3)	$	(19.4)
Loss on early extinguishment of debt	—		—		(74.0)
Other	(7.7)		10.3		22.7
Total other income (expense), net	$	10.2	$	(1.0)	$	(70.7)

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Goodwill and Other Intangible Assets Changes in Carrying Value of Goodwill (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Value of Goodwill

The changes in the carrying value of goodwill for our reportable segments, MD&E, IA&C and SC&E, for the years ended December 31, 2023 and 2022 are listed below.

	IAN		DXTRA		MD&E		IA&C		SC&E		Total 1
Balance as of December 31, 2021	$	4,231.6	$	677.1	$	—	$	—	$	—	$	4,908.7
Goodwill Reallocation	(4,231.6)		(677.1)		2,293.0		1,920.2		695.5		—
Balance as of January 1, 2022	$	—	$	—	$	2,293.0	$	1,920.2	$	695.5	$	4,908.7
Acquisitions/(Dispositions) and Deconsolidations	—		—		209.5		(6.5)		—		203.0
Foreign currency and other	—		—		(14.9)		(35.1)		(11.1)		(61.1)
Balance as of December 31, 2022	$	—	$	—	$	2,487.6	$	1,878.6	$	684.4	$	5,050.6
Goodwill Reallocation	—		—		180.6		(180.6)		—		—
Balance as of January 1, 2023	$	—	$	—	$	2,668.2	$	1,698.0	$	684.4	$	5,050.6
Acquisitions/(Dispositions)	—		—		2.2		10.7		(9.8)		3.1
Foreign currency and other	—		—		7.1		14.5		5.6		27.2
Balance as of December 31, 2023	$	—	$	—	$	2,677.5	$	1,723.2	$	680.2	$	5,080.9

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Goodwill and Other Intangible Assets Summary of Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2023

Summary of Other Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The following table provides a summary of other intangible assets, which are included in our Consolidated Balance Sheets.

	December 31,
	2023						2022
	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Customer lists	$	882.1	$	(431.6)	$	450.5	$	873.1	$	(378.4)	$	494.7
Know-how and technology	239.5		(138.9)		100.6		239.2		(111.1)		128.1
Trade names	227.3		(45.7)		181.6		231.8		(47.4)		184.4
Other	16.2		(5.3)		10.9		16.2		(5.3)		10.9
Total 1	$	1,365.1	$	(621.5)	$	743.6	$	1,360.3	$	(542.2)	$	818.1

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Goodwill and Other Intangible Assets Estimated future amortization of other intangible assets (Tables)

12 Months Ended

Dec. 31, 2023

Summary of Other Intangible Assets [Abstract]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2023 is listed below.

	2024		2025		2026		2027		2028
Estimated amortization expense	$	83.1	$	80.4	$	78.4	$	65.1	$	49.8

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Income Taxes Schedule of Income before Income Tax, Domestic and Foreign (Tables)

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

The components of income before income taxes are listed below.

	Years ended December 31,
	2023		2022		2021
Domestic	$	846.7	$	707.4	$	653.6
Foreign	561.3		561.5		568.5
Total	$	1,408.0	$	1,268.9	$	1,222.1

Restructuring and Related Costs [Table Text Block]

Restructuring Charges

	Years ended December 31,
	20231		20222		20213
Severance and termination costs	$	0.4	$	(0.1)	$	0.4
Lease restructuring costs	(1.2)		85.4		6.3
Other restructuring costs	0.9		17.1		3.9
Total restructuring charges	$	0.1	$	102.4	$	10.6

1The amounts for the year ended December 31, 2023 represent adjustments to the 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020.

2The amounts for the year ended December 31, 2022 represent 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020. The 2022 Real Estate Actions did not include any severance and termination costs.

3The amounts for the year ended December 31, 2021 represent adjustments to the actions taken in 2020.

Lease and Other restructuring costs include impairments of operating lease right-of-use assets and associated leasehold improvements, furniture and asset retirement obligations. Lease impairments were calculated based on estimated fair values using market participant assumptions including forecasted net discounted cash flows related to the operating lease right-of-use assets.

2022 Real Estate Actions

In the fourth quarter of 2022, the Company took Real Estate Actions related to new real estate exits and lease terminations to further optimize the real estate footprint supporting our office-home hybrid service model in a post-pandemic economy. All included opportunities for further efficiencies as a result of the current working environment were identified and completed during the fourth quarter of 2022.

These Real Estate Actions, taken during the fourth quarter of 2022, reduced our occupied global real estate footprint by approximately 6.7% or 500,000 square feet. All restructuring actions were identified and initiated in 2022, with all actions completed by the end of the fourth quarter of 2022.

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2023 is as follows:

			2022 Real Estate Actions
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Lease impairment costs	$	0.0	$	(0.9)	$	(0.9)	$	0.0	$	0.0
Other restructuring costs	0.0		0.8		0.2		0.6		0.0
Total	$	0.0	$	(0.1)	$	(0.7)	$	0.6	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2022 is as follows:

	2022 Real Estate Actions
	Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Lease impairment costs	$	84.4	$	84.4	$	0.0	$	0.0
Other restructuring costs	14.2		13.5		0.7		0.0
Total	$	98.6	$	97.9	$	0.7	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions by segment is as follows:

	Years ended December 31,
	2023		2022
Restructuring charges:
MD&E	$	(1.0)	$	69.0
IA&C	(0.3)		21.0
SC&E	1.1		8.0
Corporate and other	0.1		0.6
Total	$	(0.1)	$	98.6
Non cash lease impairment costs:
MD&E	$	(1.0)	$	54.3
IA&C	(0.5)		22.3
SC&E	0.4		7.0
Corporate and other	0.2		0.8
Total	$	(0.9)	$	84.4

2020 Restructuring Plan

Beginning in the second quarter of 2020, the Company took restructuring actions to lower its operating expenses structurally and permanently relative to revenue and to accelerate the transformation of our business (the “2020 Plan”).

All restructuring actions were identified and initiated in 2020, with all actions completed by the end of the fourth quarter of 2020 and were based on our experience and learning in the COVID-19 pandemic and a resulting review of our operations to address certain operating expenses such as occupancy expense and salaries and related expenses.

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2023 is as follows:

	2020 Plan
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Severance and termination costs	$	2.3	$	0.4	$	0.0	$	2.1	$	0.6
Lease impairment costs	0.0		(0.3)		(0.3)		0.0		0.0
Other restructuring costs	0.0		0.1		0.1		0.0		0.0
Total	$	2.3	$	0.2	$	(0.2)	$	2.1	$	0.6

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2022 is as follows:

	2020 Plan
	Liability at December 31, 2021		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Severance and termination costs	$	9.4	$	(0.1)	$	0.0	$	7.0	$	2.3
Lease impairment costs	0.0		1.0		1.0		0.0		0.0
Other restructuring costs	0.0		2.9		2.9		0.0		0.0
Total	$	9.4	$	3.8	$	3.9	$	7.0	$	2.3

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2021 is as follows:

	2020 Plan
	Liability at December 31, 2020		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2021
Severance and termination costs	$	74.6	$	0.4	$	0.3	$	65.3	$	9.4
Lease impairment costs	0.0		6.3		6.3		0.0		0.0
Other restructuring costs	0.0		3.9		3.2		0.7		0.0
Total	$	74.6	$	10.6	$	9.8	$	66.0	$	9.4

A summary of the restructuring activities related to the 2020 Plan by segment is as follows:

	Years ended December 31,
	2023		2022		2021
Restructuring charges:
MD&E	$	(0.3)	$	0.1	$	0.1
IA&C	0.5		7.7		2.6
SC&E	0.0		(4.2)		10.0
Corporate and other	0.0		0.2		(2.1)
Total	$	0.2	$	3.8	$	10.6
Non cash lease impairment costs:
MD&E	$	(0.3)	$	0.0	$	(0.9)
IA&C	0.0		7.0		(0.1)
SC&E	0.0		(5.9)		7.3
Corporate and other	0.0		(0.1)		0.0
Total	$	(0.3)	$	1.0	$	6.3

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Income Taxes Schedule of Components of Provision for Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The provision for income taxes is listed below.

	Years ended December 31,
	2023		2022		2021
U.S. federal income taxes (including foreign withholding taxes):
Current	$	97.6	$	168.0	$	105.4
Deferred	(16.2)		(34.9)		13.2
	$	81.4	$	133.1	$	118.6
State and local income taxes:
Current	$	40.4	$	40.4	$	27.4
Deferred	4.3		(5.3)		(0.9)
	$	44.7	$	35.1	$	26.5
Foreign income taxes:
Current	$	148.1	$	137.0	$	127.2
Deferred	17.0		13.2		(20.5)
	$	165.1	$	150.2	$	106.7
Total	$	291.2	$	318.4	$	251.8

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Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the effective income tax rate as reflected in our Consolidated Statements of Operations to the U.S. federal statutory income tax rate is listed below.

	Years ended December 31,
	2023			2022			2021
U.S. federal statutory income tax rate	21.0		%	21.0		%	21.0		%
Income tax provision at U.S. federal statutory rate	$	295.7		$	266.5		$	256.6
State and local income taxes, net of U.S. federal income tax benefit	35.3			27.7			21.0
Impact of foreign operations, including withholding taxes	51.4			37.9			47.8
U.S. tax incentives	(24.4)			(23.0)			(28.4)
Change in net valuation allowance 1	(2.5)			8.0			(59.4)
Divestitures	0.5			1.1			1.1
(Decrease)/Increase in unrecognized tax benefits	(61.1)			3.5			13.2
Other	(3.7)			(3.3)			(0.1)
Provision for income taxes	$	291.2		$	318.4		$	251.8
Effective income tax rate on operations	20.7		%	25.1		%	20.6		%

1Reflects changes in valuation allowances that impacted the effective income tax rate for each year presented.

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Income Taxes Schedule of Deferred Tax Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The components of deferred tax assets and liabilities are listed below.

	December 31,
	2023		2022
Postretirement/post-employment benefits	$	15.5	$	12.4
Deferred compensation	65.1		78.1
Pension costs	0.4		6.7
Interest	18.1		38.7
Accruals and reserves	37.0		34.8
Allowance for credit losses	11.3		12.5
Basis differences in fixed assets	72.6		6.3
Operating lease liabilities	322.7		343.5
Tax loss/tax credit carry forwards	260.4		267.0
Other	71.1		43.3
Deferred tax assets	874.2		843.3
Valuation allowance for deferred tax assets	(162.5)		(145.8)
Net deferred tax assets	$	711.7	$	697.5
Basis differences in fixed assets	$	—	$	—
Basis differences in intangible assets	(395.3)		(369.8)
Operating lease right-of-use assets	(252.8)		(269.8)
Prepaid expenses	(11.4)		(10.0)
Deferred revenue	(1.8)		(1.8)
Unremitted foreign earnings	(7.0)		(4.9)
Deferred tax liabilities	(668.3)		(656.3)
Total net deferred tax assets1	$	43.4	$	41.2

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Income Taxes Summary of Valuation Allowance (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Summary of Valuation Allowance [Table Text Block]

The change in the valuation allowance is listed below.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	145.8	$	146.0	$	197.1
Charged (reversed) to costs and expenses	13.8		8.9		(45.1)
Charged to gross tax assets and other accounts 1	(2.1)		0.6		0.9
Foreign currency translation	5.0		(9.7)		(6.9)
Balance at end of period	$	162.5	$	145.8	$	146.0

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Income Taxes Schedule of Unrecognized Tax Benefits Activity (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Unrecognized Tax Benefits Activity [Table Text Block]

The table below summarizes the activity related to our unrecognized tax benefits.

	Years ended December 31,
	2023		2022		2021
Balance at beginning of period	$	283.5	$	262.6	$	217.6
Increases as a result of tax positions taken during a prior year	50.9		4.9		17.2
Decreases as a result of tax positions taken during a prior year	(68.2)		(10.1)		(10.4)
Settlements with taxing authorities	(5.8)		(0.7)		(8.7)
Lapse of statutes of limitation	(11.4)		(6.4)		(6.2)
Increases as a result of tax positions taken during the current year	42.0		33.2		53.1
Balance at end of period	$	291.0	$	283.5	$	262.6

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Accumulated Other Comprehensive Loss, Net of Tax Schedule of Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2023

Accumulated Other Comprehensive Loss [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in accumulated other comprehensive loss, net of tax, by component.

	Foreign Currency Translation Adjustments		Derivative Instruments		Defined Benefit Pension and Other Postretirement Plans		Total
Balance as of December 31, 2021	$	(723.2)	$	22.9	$	(193.9)	$	(894.2)
Other comprehensive (loss) income before reclassifications	(130.2)		13.2		9.4		(107.6)
Amount reclassified from accumulated other comprehensive loss, net of tax	4.3		(1.1)		4.9		8.1
Balance as of December 31, 2022	$	(849.1)	$	35.0	$	(179.6)	$	(993.7)
Other comprehensive income (loss) before reclassifications	59.5		0.4		(15.8)		44.1
Amount reclassified from accumulated other comprehensive loss, net of tax	0.5		(1.9)		4.8		3.4
Balance as of December 31, 2023	$	(789.1)	$	33.5	$	(190.6)	$	(946.2)

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Accumulated Other Comprehensive Loss, Net of Tax Reclassification out of Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2023

Accumulated Other Comprehensive Loss [Abstract]

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

Amounts reclassified from accumulated other comprehensive loss, net of tax, for the years ended December 31, 2023, 2022 and 2021 are as follows:

	Years ended December 31,						Affected Line Item in the Consolidated Statements of Operations
	2023		2022		2021
Foreign currency translation adjustments 1	$	0.5	$	4.3	$	(1.0)	Other income (expense), net
Net (gain) loss on derivative instruments	(2.6)		(1.4)		4.2		Other income (expense), net, Interest Expense
Amortization of defined benefit pension and postretirement plans items	6.5		6.3		10.0		Other income (expense), net
Tax effect	(1.0)		(1.1)		(3.1)		Provision for income taxes
Total amount reclassified from accumulated other comprehensive loss, net of tax	$	3.4	$	8.1	$	10.1

1These foreign currency translation adjustments are primarily a result of the sales of businesses.

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Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2023

Restructuring Charges [Abstract]

Restructuring and Related Costs [Table Text Block]

Restructuring Charges

	Years ended December 31,
	20231		20222		20213
Severance and termination costs	$	0.4	$	(0.1)	$	0.4
Lease restructuring costs	(1.2)		85.4		6.3
Other restructuring costs	0.9		17.1		3.9
Total restructuring charges	$	0.1	$	102.4	$	10.6

1The amounts for the year ended December 31, 2023 represent adjustments to the 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020.

2The amounts for the year ended December 31, 2022 represent 2022 Real Estate Actions, as well as adjustments to the actions taken in 2020. The 2022 Real Estate Actions did not include any severance and termination costs.

3The amounts for the year ended December 31, 2021 represent adjustments to the actions taken in 2020.

Lease and Other restructuring costs include impairments of operating lease right-of-use assets and associated leasehold improvements, furniture and asset retirement obligations. Lease impairments were calculated based on estimated fair values using market participant assumptions including forecasted net discounted cash flows related to the operating lease right-of-use assets.

2022 Real Estate Actions

In the fourth quarter of 2022, the Company took Real Estate Actions related to new real estate exits and lease terminations to further optimize the real estate footprint supporting our office-home hybrid service model in a post-pandemic economy. All included opportunities for further efficiencies as a result of the current working environment were identified and completed during the fourth quarter of 2022.

These Real Estate Actions, taken during the fourth quarter of 2022, reduced our occupied global real estate footprint by approximately 6.7% or 500,000 square feet. All restructuring actions were identified and initiated in 2022, with all actions completed by the end of the fourth quarter of 2022.

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2023 is as follows:

			2022 Real Estate Actions
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Lease impairment costs	$	0.0	$	(0.9)	$	(0.9)	$	0.0	$	0.0
Other restructuring costs	0.0		0.8		0.2		0.6		0.0
Total	$	0.0	$	(0.1)	$	(0.7)	$	0.6	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions as of the year ended December 31, 2022 is as follows:

	2022 Real Estate Actions
	Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Lease impairment costs	$	84.4	$	84.4	$	0.0	$	0.0
Other restructuring costs	14.2		13.5		0.7		0.0
Total	$	98.6	$	97.9	$	0.7	$	0.0

A summary of the restructuring activities related to the 2022 Real Estate Actions by segment is as follows:

	Years ended December 31,
	2023		2022
Restructuring charges:
MD&E	$	(1.0)	$	69.0
IA&C	(0.3)		21.0
SC&E	1.1		8.0
Corporate and other	0.1		0.6
Total	$	(0.1)	$	98.6
Non cash lease impairment costs:
MD&E	$	(1.0)	$	54.3
IA&C	(0.5)		22.3
SC&E	0.4		7.0
Corporate and other	0.2		0.8
Total	$	(0.9)	$	84.4

2020 Restructuring Plan

Beginning in the second quarter of 2020, the Company took restructuring actions to lower its operating expenses structurally and permanently relative to revenue and to accelerate the transformation of our business (the “2020 Plan”).

All restructuring actions were identified and initiated in 2020, with all actions completed by the end of the fourth quarter of 2020 and were based on our experience and learning in the COVID-19 pandemic and a resulting review of our operations to address certain operating expenses such as occupancy expense and salaries and related expenses.

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2023 is as follows:

	2020 Plan
	Liability at December 31, 2022		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2023
Severance and termination costs	$	2.3	$	0.4	$	0.0	$	2.1	$	0.6
Lease impairment costs	0.0		(0.3)		(0.3)		0.0		0.0
Other restructuring costs	0.0		0.1		0.1		0.0		0.0
Total	$	2.3	$	0.2	$	(0.2)	$	2.1	$	0.6

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2022 is as follows:

	2020 Plan
	Liability at December 31, 2021		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2022
Severance and termination costs	$	9.4	$	(0.1)	$	0.0	$	7.0	$	2.3
Lease impairment costs	0.0		1.0		1.0		0.0		0.0
Other restructuring costs	0.0		2.9		2.9		0.0		0.0
Total	$	9.4	$	3.8	$	3.9	$	7.0	$	2.3

A summary of the restructuring activities related to the 2020 Plan as of the year ended December 31, 2021 is as follows:

	2020 Plan
	Liability at December 31, 2020		Restructuring Expense		Non-Cash Items		Cash Payments		Liability at December 31, 2021
Severance and termination costs	$	74.6	$	0.4	$	0.3	$	65.3	$	9.4
Lease impairment costs	0.0		6.3		6.3		0.0		0.0
Other restructuring costs	0.0		3.9		3.2		0.7		0.0
Total	$	74.6	$	10.6	$	9.8	$	66.0	$	9.4

A summary of the restructuring activities related to the 2020 Plan by segment is as follows:

	Years ended December 31,
	2023		2022		2021
Restructuring charges:
MD&E	$	(0.3)	$	0.1	$	0.1
IA&C	0.5		7.7		2.6
SC&E	0.0		(4.2)		10.0
Corporate and other	0.0		0.2		(2.1)
Total	$	0.2	$	3.8	$	10.6
Non cash lease impairment costs:
MD&E	$	(0.3)	$	0.0	$	(0.9)
IA&C	0.0		7.0		(0.1)
SC&E	0.0		(5.9)		7.3
Corporate and other	0.0		(0.1)		0.0
Total	$	(0.3)	$	1.0	$	6.3

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Incentive Compensation Plans Schedule of Stock-based Compensation Expense (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement, Additional Disclosure [Abstract]

Schedule of Stock-based Compensation Expense

The amounts of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statements of Operations, and the related tax benefit, are listed below.

	Years ended December 31,
	2023		2022		2021
Stock-settled awards	$	27.8	$	26.3	$	36.7
Cash-settled awards	0.3		0.3		1.0
Performance-based awards	18.9		23.7		33.4
Stock Options	0.3		0.3		0.3
Employee stock purchase plan	2.9		3.1		2.1
Other 1	2.7		2.0		11.3
Stock-based compensation expense	$	52.9	$	55.7	$	84.8
Tax benefit	$	12.5	$	13.1	$	18.0

1Represents charges recorded for severance expense related to stock-based compensation awards.

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Incentive Compensation Plans Schedule of Stock Options Activity (Tables)

12 Months Ended

Dec. 31, 2023

Summary of Stock Options Assumptions [Abstract]

Share-based Payment Arrangement, Option, Activity [Table Text Block]

The following table summarizes our stock option activity during 2023.

	Options	Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2023	0.3	$	23.30
Granted	0.0	0.0
Exercised	0.0	$	12.77
Stock options outstanding as of December 31, 2023	0.3	$	23.33	7.0	$	2.3

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Incentive Compensation Plans Stock-based Compensation, Grants in Period Weighted Average (Tables)

12 Months Ended

Dec. 31, 2023

Summary of Stock Options Assumptions [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2023 and 2022.

	Years ended December 31,
	2023		2022		2021
Stock-Settled Awards:
Awards granted	1.4		1.3		0.9
Weighted-average grant-date fair value (per award)	$	35.54	$	36.36	$	26.96
Total fair value of vested awards distributed	$	60.8	$	59.7	$	50.8
Cash-Settled Awards:
Awards granted	0.0		0.0		0.0
Weighted-average grant-date fair value (per award)	$	35.71	$	36.53	$	0.0
Total fair value of vested awards distributed	$	0.8	$	0.8	$	0.7
Performance-Based Awards:
Awards granted	2.1		1.6		0.5
Weighted-average grant-date fair value (per award)	$	26.31	$	29.95	$	21.98
Total fair value of vested awards distributed	$	84.8	$	54.5	$	39.3

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Incentive Compensation Plans Schedule of Nonvested Stock Activity (Tables)

12 Months Ended

Dec. 31, 2023

Summary of Stock Options Assumptions [Abstract]

Schedule of Nonvested Share Activity [Table Text Block]

A summary of the activity of our non-vested stock-settled awards, cash-settled awards and performance-based awards during 2023 is presented below (performance-based awards are shown at 100% of the shares originally granted).

	Stock-Settled Awards				Cash-Settled Awards				Performance-Based Awards
	Awards		Weighted- Average Grant-Date Fair Value (per award)		Awards		Weighted- Average Grant-Date Fair Value (per award)		Awards		Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2023	3.5		$	27.52	0.0		$	27.96	2.9		$	24.31
Reinstated	0.1		29.25		0.0		0.0		0.0		33.26
Granted	1.4		35.54		0.0		35.71		2.1		26.31
Vested	(1.7)		21.92		0.0		21.02		(2.4)		18.03
Forfeited	(0.4)		31.04		0.0		34.96		(0.3)		27.82
Non-vested as of December 31, 2023	2.9		$	34.20	0.0		$	36.05	2.3		$	32.09
Total unrecognized compensation expense remaining	$	47.9			$	0.7			$	34.1
Weighted-average years expected to be recognized over	1.4				1.7				1.8

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Fair Value Measurements Fair Value of Assets and Liabilities Measured on a Recurring Basis (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The following tables present information about our financial instruments measured at fair value on a recurring basis as of December 31, 2023 and 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2023								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	1,521.5	$	—	$	—	$	1,521.5	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	$	—	$	—	$	3.1	$	3.1	Accrued liabilities and Other non-current liabilities
	December 31, 2022								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	1,688.1	—		—		$	1,688.1	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	—		—		21.6		$	21.6	Accrued liabilities and Other non-current liabilities

1Contingent acquisition obligations includes deferred acquisition payments and unconditional obligations to purchase additional non-controlling equity shares of consolidated subsidiaries. Fair value measurement of the obligations is based upon actual and projected operating performance targets as specified in the related agreements. The decrease in this balance of $18.5 from December 31, 2022 to December 31, 2023 is primarily due to payments related to our deferred acquisitions from prior-year acquisitions and valuation adjustments, partially offset by the addition of a new contingent acquisition obligation and the exercises of redeemable non-controlling interest. The amounts payable within the next twelve months are classified in accrued liabilities; any amounts payable thereafter are classified in other non-current liabilities.

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Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Nonrecurring (Tables)

12 Months Ended

Dec. 31, 2023

Assets and Liabilities Measured at Fair Value on Recurring Basis [Abstract]

Fair Value Measurements, Nonrecurring [Table Text Block]

The following table presents information about our financial instruments that are not measured at fair value on a recurring basis as of December 31, 2023, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2023								December 31, 2022
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Total long-term debt	$	—	$	2,974.5	$	0.8	$	2,975.3	$	—	$	2,551.5	$	0.8	$	2,552.3

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Schedule of Defined Benefit Plans Disclosures (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

Pension and Postretirement Benefit Obligation

The change in the benefit obligation, the change in plan assets, the funded status and amounts recognized for the Domestic Pension Plan, the significant foreign pension plans and the domestic postretirement benefit plan are listed below.

	Domestic Pension Plan				Foreign Pension Plans				Domestic Postretirement Benefit Plan
	2023		2022		2023		2022		2023		2022
Benefit Obligation
Projected benefit obligation as of January 1	$	75.0	$	104.1	$	334.2	$	546.0	$	17.9	$	24.2
Service cost	0.0		0.0		2.2		4.6		0.0		0.0
Interest cost	4.0		2.8		15.6		8.9		0.9		0.6
Benefits paid	(8.2)		(9.0)		(18.9)		(20.9)		(5.1)		(4.8)
Plan participant contributions	0.0		0.0		0.0		0.0		1.8		1.9
Actuarial (gains) losses	1.0		(23.0)		6.8		(153.3)		0.6		(4.0)
Settlements	0.0		0.0		(2.5)		0.0		0.0		0.0
Plan amendments	0.0		0.1		0.0		0.0		0.0		0.0
Foreign currency effect	0.0		0.0		17.4		(51.1)		0.0		0.0
Projected benefit obligation as of December 31	$	71.8	$	75.0	$	354.8	$	334.2	$	16.1	$	17.9
Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	70.5	$	98.1	$	297.1	$	484.8	$	0.0	$	0.0
Actual return on plan assets	6.7		(18.6)		5.3		(134.8)		0.0		0.0
Employer contributions	0.0		0.0		61.4		16.4		3.3		2.9
Plan participant contributions	0.0		0.0		0.0		0.0		1.8		1.9
Benefits paid	(8.2)		(9.0)		(18.9)		(20.9)		(5.1)		(4.8)
Settlements	0.0		0.0		(2.5)		0.0		0.0		0.0
Foreign currency effect	0.0		0.0		17.3		(48.4)		0.0		0.0
Fair value of plan assets as of December 31	$	69.0	$	70.5	$	359.7	$	297.1	$	0.0	$	0.0
Funded status of the plans at December 31	$	(2.8)	$	(4.5)	$	4.9	$	(37.1)	$	(16.1)	$	(17.9)

	Domestic Pension Plan				Foreign Pension Plans				Domestic Postretirement Benefit Plan
December 31,	2023		2022		2023		2022		2023		2022
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0	$	0.0	$	59.8	$	17.8	$	0.0	$	0.0
Current liability	0.0		0.0		(7.0)		(5.1)		(1.9)		(2.0)
Non-current liability	(2.8)		(4.5)		(47.9)		(49.8)		(14.2)		(15.9)
Net liability recognized	$	(2.8)	$	(4.5)	$	4.9	$	(37.1)	$	(16.1)	$	(17.9)
Accumulated benefit obligation	$	71.8	$	75.0	$	351.2	$	328.2
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	$	41.1	$	44.4	$	157.7	$	134.6	$	1.7	$	1.1
Prior service cost (credit)	0.0		0.1		0.4		0.6		0.0		0.0
Total amount recognized	$	41.1	$	44.5	$	158.1	$	135.2	$	1.7	$	1.1

Actuarial losses of $1.0 for the Domestic Pension Plan are attributed to a decrease in the discount rate from 5.65% as of December 31, 2022 to 5.40% as of December 31, 2023 and changes in demographic experience. Actuarial losses of $6.8 for the foreign pension plans are attributed to a decrease in the weighted-average discount rate from 4.62% as of December 31, 2022 to 4.32% as of December 31, 2023 and changes in demographic experience.

	Domestic Pension Plan				Foreign Pension Plans
December 31,	2023		2022		2023		2022
Pension plans with an accumulated benefit obligation in excess of plan assets
Aggregate projected benefit obligation	$	71.8	$	75.0	$	55.8	$	67.4
Aggregate accumulated benefit obligation	71.8		75.0		53.7		62.4
Aggregate fair value of plan assets	69.0		70.5		1.0		12.5

	Domestic Pension Plan				Foreign Pension Plans
December 31,	2023		2022		2023		2022
Pension plans with a projected benefit obligation in excess of plan assets
Aggregate projected benefit obligation	$	71.8	$	75.0	$	66.0	$	67.4
Aggregate accumulated benefit obligation	71.8		75.0		63.5		62.4
Aggregate fair value of plan assets	69.0		70.5		11.1		12.5

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Employee Benefits Schedule of Net Benefit Costs (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

Net Periodic Cost

The components of net periodic benefit cost and key assumptions are listed below.

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Service cost	$	0.0	$	0.0	$	0.0	$	2.2	$	4.6	$	4.5	$	0.0	$	0.0	$	0.0
Interest cost	4.0		2.8		2.9		15.6		8.9		8.0		0.9		0.6		0.7
Expected return on plan assets	(4.0)		(4.7)		(5.6)		(17.0)		(19.8)		(20.8)		0.0		0.0		0.0
Curtailment and settlement	0.0		0.0		1.5		(0.3)		0.0		(0.9)		0.0		0.0		0.0
Amortization of:
Prior service cost (credit)	0.1		0.0		0.0		0.1		0.1		0.1		0.0		0.0		0.0
Net actuarial losses	1.6		1.4		1.7		5.0		4.4		6.7		0.0		0.4		0.9
Net periodic cost	$	1.7	$	(0.5)	$	0.5	$	5.6	$	(1.8)	$	(2.4)	$	0.9	$	1.0	$	1.6

Assumptions

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Net periodic cost
Discount rate	5.65	%	2.95	%	2.60	%	4.62	%	1.86	%	1.35	%	5.65	%	2.90	%	2.50	%
Rate of compensation increase	N/A		N/A		N/A		2.80	%	2.65	%	2.47	%	N/A		N/A		N/A
Expected return on plan assets	6.00	%	5.00	%	5.75	%	5.62	%	4.47	%	4.47	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Benefit obligation
Discount rate	5.40	%	5.65	%	2.95	%	4.32	%	4.62	%	1.86	%	5.40	%	5.65	%	2.90	%
Rate of compensation increase	N/A		N/A		N/A		3.35	%	2.80	%	2.65	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Healthcare cost trend rate assumed for next year
Initial rate (weighted-average)													6.50	%	6.75	%	6.50	%
Year ultimate rate is reached													2030		2030		2028
Ultimate rate													5.00	%	5.00	%	5.00	%

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Employee Benefits Fair Value of Pension Plan Assets (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Fair Value of Pension Plan Assets [Table Text Block]

The following table presents the fair value of our domestic and foreign pension plan assets as of December 31, 2023 and 2022, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. See Note 13 for a description of the fair value hierarchy.

	December 31, 2023								December 31, 2022
Plan assets subject to fair value hierarchy	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Registered investment companies	$	6.7	$	0.0	$	0.0	$	6.7	$	10.6	$	0.0	$	0.0	$	10.6
Limited partnerships	0.0		0.0		0.0		0.0		0.0		0.0		0.0		0.0
Fixed income securities	9.2		0.0		0.0		9.2		12.5		0.0		0.0		12.5
Insurance contracts	0.0		1.4		334.4		335.8		0.0		1.6		0.0		1.6
Other	10.7		0.0		0.0		10.7		11.9		0.0		0.0		11.9
Total plan assets, subject to leveling	$	26.6	$	1.4	$	334.4	$	362.4	$	35.0	$	1.6	$	—	$	36.6
Other Plan Assets
Other investments measured at net asset value 1							106.5								331.0
Non-benefit obligation liabilities							(40.2)								0.0
Total plan assets							$	428.7							$	367.6

1Certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy but are included to reconcile to the amounts presented in the fair value of plan assets table above.

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Employee Benefits Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

The following table presents additional information about our significant foreign pension plan assets for which we utilize Level 3 inputs to determine fair value.

	Years ended December 31,
Plan assets subject to fair value hierarchy, Level 3	2023		2022
Balance at beginning of period	$	0.0	$	24.0
Actual return on plan assets	19.9		(1.7)
Net purchases, sales and settlements	314.5		(22.3)
Balance at end of period	$	334.4	$	0.0

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Employee Benefits Schedule of Allocation of Plan Assets (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Allocation of Plan Assets [Table Text Block]

As of December 31, 2023, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.

			December 31,
Asset Class	2024 Target Allocation		2023		2022
Alternative investments 1	—	%	—	%	18	%
Equity securities	6	%	5	%	14	%
Fixed income securities	15	%	16	%	26	%
Insurance contracts	78	%	78	%	—	%
Liability driven investments 2	—	%	—	%	28	%
Real estate & Other	1	%	1	%	14	%
Total	100	%	100	%	100	%

1Alternative investments have the flexibility to dynamically invest across a broad range of asset classes including bonds, equity, cash, property and commodities.

2Liability driven investment strategies use government bonds as well as derivative instruments to hedge a portion of the impact of interest rates and inflation movements on the long-term liabilities.

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Employee Benefits Schedule of Estimated Future Benefit Payments (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Expected Benefit Payments [Table Text Block]

The estimated future benefit payments expected to be paid are presented below.

Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2024	$	8.0	$	22.6	$	1.6
2025	7.2		22.0		1.5
2026	6.9		21.6		1.4
2027	6.9		21.1		1.7
2028	6.4		21.6		1.6
2029 - 2033	27.4		108.4		6.3

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Segment Information Schedule of Segment Reporting Information, by Segment (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Summarized financial information concerning our reportable segments is shown in the following tables.

	Years ended December 31,
	2023		2022		2021
Total Revenue:
MD&E	$	4,394.8	$	4,381.6	$	4,196.6
IA&C	4,002.2		4,140.6		4,041.8
SC&E	2,492.3		2,405.6		2,002.3
Total	$	10,889.3	$	10,927.8	$	10,240.7
Revenue before billable expenses:
MD&E	$	4,326.5	$	4,296.9	$	4,117.7
IA&C	3,633.2		3,766.3		3,679.7
SC&E	1,440.9		1,386.2		1,310.5
Total	$	9,400.6	$	9,449.4	$	9,107.9
Restructuring:
MD&E	(1.3)		69.1		0.1
IA&C	0.2		28.7		2.6
SC&E	1.1		3.8		10.0
Corporate and other	0.1		0.8		(2.1)
Total	$	0.1	$	102.4	$	10.6
Segment EBITA1:
MD&E	$	832.4	$	744.5	$	865.3
IA&C	541.3		581.4		597.9
SC&E	265.2		234.5		188.6
Corporate and other	(72.3)		(94.5)		(129.4)
Total	$	1,566.6	$	1,465.9	$	1,522.4
Amortization of acquired intangibles:
MD&E	$	77.3	$	72.8	$	71.9
IA&C	4.3		7.2		10.4
SC&E	2.4		4.7		3.9
Corporate and other	0.0		0.0		0.0
Total	$	84.0	$	84.7	$	86.2
Depreciation and amortization2:
MD&E	$	105.8	$	107.4	$	108.0
IA&C	53.6		58.4		62.7
SC&E	15.9		16.9		17.7
Corporate and other	5.0		6.6		9.2
Total	$	180.3	$	189.3	$	197.6
Capital expenditures:
MD&E	$	100.1	$	97.4	$	99.7
IA&C	40.8		43.8		57.5
SC&E	6.4		7.3		8.1
Corporate and other	32.0		29.6		30.0
Total	$	179.3	$	178.1	$	195.3

1 Segment EBITA is calculated as net income available to IPG common stockholders before provision for income taxes, total (expenses) and other income, equity in net income of unconsolidated affiliates, net income attributable to non-controlling interests and amortization of acquired intangibles.

2 Excludes amortization of acquired intangibles.

	December 31,
	2023		2022
Total assets:
MD&E	$	10,715.4	$	9,984.3
IA&C	4,812.5		5,083.5
SC&E	1,800.6		1,629.9
Corporate and other	1,938.8		2,114.0
Total	$	19,267.3	$	18,811.7

The following table presents the reconciliation of segment EBITA to Income before income taxes.

	Years ended December 31,
	2023		2022		2021
MD&E EBITA	$	832.4	$	744.5	$	865.3
IA&C EBITA	541.3		581.4		597.9
SC&E EBITA	265.2		234.5		188.6
Corporate and other EBITA	(72.3)		(94.5)		(129.4)
Less: consolidated amortization of acquired intangibles	84.0		84.7		86.2
Operating income	1,482.6		1,381.2		1,436.2
Total (expenses) and other income	(74.6)		(112.3)		(214.1)
Income before income taxes	$	1,408.0	$	1,268.9	$	1,222.1

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Segment Information Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

Long-lived assets, including operating lease right-of-use assets and excluding intangible assets, are presented by major geographic area in the following table.

	Long-Lived Assets
	December 31,
	2023		2022
Domestic	$	1,546.0	$	1,676.7
International:
United Kingdom	290.1		254.8
Continental Europe	84.7		87.6
Asia Pacific	163.2		176.5
Latin America	59.0		61.6
Other	84.3		88.9
Total International	681.3		669.4
Total Consolidated	$	2,227.3	$	2,346.1

Property and equipment are allocated based upon physical location. Other assets and investments are allocated based on the location of the related operations.

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Commitments and Contingencies Schedule of Contingent Acquisition Obligations (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]

Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2023.

	2024		2025		2026		2027		2028		Thereafter		Total
Deferred acquisition payments	$	2.9	$	0.1	$	0.1	$	0.0	$	0.0	$	0.0	$	3.1
Redeemable non-controlling interests and call options with affiliates 1	9.7		17.4		19.9		28.7		0.0		0.0		75.7
Total contingent acquisition payments	$	12.6	$	17.5	$	20.0	$	28.7	$	0.0	$	0.0	$	78.8

1We have entered into certain acquisitions that contain both redeemable non-controlling interests and call options with similar terms and conditions. The estimated amounts listed would be paid in the event of exercise at the earliest exercise date. We have certain redeemable non-controlling interests that are exercisable at the discretion of the non-controlling equity owners as of December 31, 2023. These estimated payments of $1.4 are included within the total payments expected to be made in 2024, and will continue to be carried forward into 2025 or beyond until exercised or expired. Redeemable non-controlling interests are included in the table at current exercise price payable in cash, not at applicable redemption value, in accordance with the authoritative guidance for classification and measurement of redeemable securities.

The majority of these payments are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revision in accordance with the terms of the respective agreements. See Note 6 for further information relating to the payment structure of our acquisitions.

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Summary of Significant Accounting Policies (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares
Operating Lease, Right-of-Use Asset	$ 1,162.6	$ 1,277.5
Operating Lease, Liability	1,469.4
Revenue, remaining performance obligation, amount	716.5
Retirement of treasury stock, amount	$ (0.0)	0.0
ERP Systems, Useful Life	10
Minimum Remaining Lease Term	1 year
Maximum Remaining Lease Term	13 years
Leasehold Improvements, Useful Life	the shorter of the useful life or the remaining lease term
Number of Reporting Units for Purposes of Annual Goodwill Impairment Test	10
Foreign Currency Transaction pre-tax Gain (Loss)	$ 5.7	(2.5)	$ 5.0
Minimum
Furniture and Equipment, Useful Life	3 years
Buildings, Useful Life	10 years
Other Internal Use Software, Useful Life	3
Identifiable Intangible Assets, Useful Life	7 years
Maximum
Furniture and Equipment, Useful Life	7 years
Buildings, Useful Life	35 years
Other Internal Use Software, Useful Life	7
Identifiable Intangible Assets, Useful Life	15 years
Common Stock [Member]
Retirement of treasury stock, amount	$ 0.9	0.7
Treasury Stock [Member]
Retirement of treasury stock, amount	(340.4)	(199.9)
Additional Paid-in Capital [Member]
Retirement of treasury stock, amount	$ 339.5	$ 199.2
Common Stock, Shares Issued [Member]
Retirement of treasury stock, shares | shares	(9.3)	(7.2)	0.0

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Revenue Major Geographical Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net revenue	$ 9,400.6	$ 9,449.4	$ 9,107.9
Total revenue	10,889.3	10,927.8	10,240.7
United States
Net revenue	6,102.2	6,157.7	5,763.1
Total revenue	7,033.1	7,031.0	6,360.2
Total International
Net revenue	3,298.4	3,291.7	3,344.8
Total revenue	3,856.2	3,896.8	3,880.5
United Kingdom
Net revenue	759.2	742.2	781.5
Total revenue	891.5	902.7	880.5
Continental Europe
Net revenue	795.7	764.6	799.7
Total revenue	901.3	867.5	892.8
Asia Pacific
Net revenue	729.8	772.7	791.4
Total revenue	868.3	918.5	970.1
Latin America
Net revenue	448.7	423.6	396.4
Total revenue	477.0	454.9	430.3
Other
Net revenue	565.0	588.6	575.8
Total revenue	718.1	753.2	706.8
MD&E
Net revenue	4,326.5	4,296.9	4,117.7
Total revenue	4,394.8	4,381.6	4,196.6
MD&E | United States
Net revenue	2,703.5	2,690.9	2,552.0
Total revenue	2,731.4	2,730.2	2,584.7
MD&E | Total International
Net revenue	1,623.0	1,606.0	1,565.7
Total revenue	1,663.4	1,651.4	1,611.9
IA&C
Net revenue	3,633.2	3,766.3	3,679.7
Total revenue	4,002.2	4,140.6	4,041.8
IA&C | United States
Net revenue	2,383.8	2,483.7	2,306.0
Total revenue	2,508.8	2,585.9	2,403.3
IA&C | Total International
Net revenue	1,249.4	1,282.6	1,373.7
Total revenue	1,493.4	1,554.7	1,638.5
SC&E
Net revenue	1,440.9	1,386.2	1,310.5
Total revenue	2,492.3	2,405.6	2,002.3
SC&E | United States
Net revenue	1,014.9	983.1	905.1
Total revenue	1,792.9	1,714.9	1,372.2
SC&E | Total International
Net revenue	426.0	403.1	405.4
Total revenue	$ 699.4	$ 690.7	$ 630.1

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Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Lease, Liability, Leases Not Commenced	$ 81.0
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	299.6
Operating Lease, Expense	$ 268.4	$ 290.7	$ 306.0
Minimum Remaining Lease Term	1 year
Maximum Remaining Lease Term	13 years
Short-term Lease, Cost	$ 7.9	6.4	8.1
Sublease Income	(26.4)	(23.8)	(21.1)
Lease, Cost	249.9	273.3	293.0
Operating Lease, Payments	299.5	320.9	347.6
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 83.0	$ 93.0	$ 431.0
Operating Lease, Weighted Average Remaining Lease Term	7 years	8 years	8 years
Operating Lease, Weighted Average Discount Rate, Percent	3.63%	3.51%	3.45%
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 270.1
Lessee, Operating Lease, Liability, Payments, Due Year Three	249.8
Lessee, Operating Lease, Liability, Payments, Due Year Four	215.4
Lessee, Operating Lease, Liability, Payments, Due Year Five	170.9
Lessee, Operating Lease, Liability, Payments, Due after Year Five	458.4
Lessee, Operating Lease, Liability, Payments, Due	1,664.2
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	194.8
Operating Lease, Liability	1,469.4
Operating Lease, Liability, Current	252.6	$ 235.9
Operating Lease, Liability, Noncurrent	$ 1,216.8	$ 1,380.1
Minimum Lease Term for Leases That Have Not Yet Commenced	1 year
Maximum Lease Term for Leases That Have Not Yet Commenced	12 years

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Debt and Credit Agreements Long-Term Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 3,167.6	$ 2,871.3
Long-term debt, current maturities	250.1	0.6
Long-term debt, excluding current maturities	2,917.5	2,870.7
Deb instrument, unamortized debt issuance costs	22.7	26.2
Long-term debt, fair value	2,975.3	2,552.3
4.000% Notes Due 2022
Debt Instrument [Line Items]
Senior Notes	$ 250.0
Interest rate, stated percentage	4.00%
3.750% Notes Due 2023
Debt Instrument [Line Items]
Senior Notes	$ 500.0
Interest rate, stated percentage	3.75%
4.200% Notes Due 2024 (less unamortized discount and issuance costs of $0.1 and $0.5, respectively)
Debt Instrument [Line Items]
Senior Notes	$ 250.0
Long-term debt, gross	249.9	249.7
Deb instrument, unamortized debt issuance costs	$ 0.1
Debt instrument, maturity date	Apr. 15, 2024
Interest rate, stated percentage	4.20%
Debt instrument, interest rate, effective percentage	4.24%
Debt Instrument, Unamortized Discount (Premium), Net	$ 0.0
4.650% Notes Due 2028 (less unamortized discount and issuance costs of $1.2 and $3.0, respectively)
Debt Instrument [Line Items]
Senior Notes	500.0
Long-term debt, gross	497.0	496.4
Deb instrument, unamortized debt issuance costs	$ 2.1
Debt instrument, maturity date	Oct. 01, 2028
Interest rate, stated percentage	4.65%
Debt instrument, interest rate, effective percentage	4.78%
Debt Instrument, Unamortized Discount (Premium), Net	$ 0.9
4.750% Note Due 2030 (less unamortized discount and issuance costs of $3.2 and $5.1, respectively)
Debt Instrument [Line Items]
Senior Notes	650.0
Long-term debt, gross	643.6	642.6
Deb instrument, unamortized debt issuance costs	$ 3.8
Debt instrument, maturity date	Mar. 30, 2030
Interest rate, stated percentage	4.75%
Debt instrument, interest rate, effective percentage	4.92%
Debt Instrument, Unamortized Discount (Premium), Net	$ 2.6
2.400% Note Due 2031 (less unamortized discount and issuance costs of $0.7 and $4.3, respectively)
Debt Instrument [Line Items]
Senior Notes	500.0
Long-term debt, gross	496.0	495.5
Deb instrument, unamortized debt issuance costs	$ 3.3
Debt instrument, maturity date	Mar. 01, 2031
Interest rate, stated percentage	2.40%
Debt instrument, interest rate, effective percentage	2.512%
Debt Instrument, Unamortized Discount (Premium), Net	$ 0.7
3.375% Note Due 2041 (less unamortized discount and issuance costs of $1.1 and $5.5, respectively)
Debt Instrument [Line Items]
Senior Notes	500.0
Long-term debt, gross	494.1	493.7
Deb instrument, unamortized debt issuance costs	$ 5.0
Debt instrument, maturity date	Mar. 01, 2041
Interest rate, stated percentage	3.375%
Debt instrument, interest rate, effective percentage	3.448%
Debt Instrument, Unamortized Discount (Premium), Net	$ 0.9
5.40% Notes Due 2048 (less unamortized discount and issuance costs of $2.7 and $5.0, respectively)
Debt Instrument [Line Items]
Senior Notes	500.0
Long-term debt, gross	492.8	492.6
Deb instrument, unamortized debt issuance costs	$ 4.6
Debt instrument, maturity date	Oct. 01, 2048
Interest rate, stated percentage	5.40%
Debt instrument, interest rate, effective percentage	5.48%
Debt Instrument, Unamortized Discount (Premium), Net	$ 2.6
Other notes payable and capitalized leases
Debt Instrument [Line Items]
Long-term debt, gross	0.8	0.8
Unsecured Debt 5.375% Notes
Debt Instrument [Line Items]
Senior Notes	300.0
Long-term debt, gross	293.4	$ 0.0
Deb instrument, unamortized debt issuance costs	$ 3.0
Debt instrument, maturity date	Jun. 15, 2033
Interest rate, stated percentage	5.375%
Debt instrument, interest rate, effective percentage	5.65%
Debt Instrument, Unamortized Discount (Premium), Net	$ 3.6

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Debt and Credit Agreements Debt Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of New Debt Issuance [Line Items]
Loss on Extinguishment of Debt	$ 0.0	$ 0.0	$ (74.0)
Recognition of previously unrealized losses included in net income	2.6	$ 1.4	$ (4.2)
4.00% Notes Due 2022
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 250.0
Interest rate, stated percentage	4.00%
3.75% Notes Due 2023
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	3.75%
4.20% Notes Due 2024
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 250.0
Interest rate, stated percentage	4.20%
4.65% Notes Due 2028
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	4.65%
4.75% Note Due 2030
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 650.0
Interest rate, stated percentage	4.75%
5.40% Notes Due 2048
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	5.40%
2.400% Note Due 2031 (less unamortized discount and issuance costs of $0.7 and $4.3, respectively)
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	2.40%
3.375% Note Due 2041 (less unamortized discount and issuance costs of $1.1 and $5.5, respectively)
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Interest rate, stated percentage	3.375%
Unsecured Debt 4.200% Notes Original Principal
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	$ 500.0
Unsecured Debt 5.375% Notes
Schedule of New Debt Issuance [Line Items]
Debt Instrument, Face Amount	300.0
Unsecured Debt	292.9
Debt instrument, unamortized discount	3.8
Debt Issuance Costs, Gross	$ 3.3
Interest rate, stated percentage	5.375%

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Debt and Credit Agreements Annual Maturities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Long-term debt, maturities, repayments of principal in next twelve months	$ 250.1
Long-term debt, maturities, repayments of principal in year two	0.2
Long-term debt, maturities,repayments of principal in year three	0.2
Long-term debt, maturities, repayments of principal in year four	0.1
Long-term debt, maturities, repayments of principal in year five	497.0
Long-term debt, maturities, repayments of principal after year five	2,420.0
Total long-term debt	$ 3,167.6	$ 2,871.3

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Debt and Credit Agreements Credit Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Line of Credit Facility [Line Items]
Cash debt pooling arrangements, amount netted	$ 2,718.0	$ 2,411.2
Margin for base rate advances	0.125%
Margin for Eurocurrency rate advances	1.125%
Annual rate for fronting fees accrued on letters of credit	0.25%
Annual facility fee	0.125%
Leverage ratio maximum	3.50x
Asset Acquisition, Price of Acquisition, Expected	$ 200.0
Committed credit facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,500.0
Line of credit facility, available capacity increase amount	250.0
Limits on letters of credit	50.0
Line of credit facility, amount outstanding	0.0
Letters of credit, amount outstanding	9.5	10.3
Line of credit facility, remaining borrowing capacity	1,490.5	1,489.7
Uncommitted credit facility
Line of Credit Facility [Line Items]
Line of credit facility, amount outstanding	34.2	44.3
Line of Credit Facility, Average Outstanding Amount	47.9	61.2
Line of credit facility, current borrowing capacity	$ 780.7	$ 936.2
Line of credit facility, weighted average interest rate, over time	7.90%	4.60%

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Debt and Credit Agreements Commercial Paper (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Debt Disclosure [Abstract]
Commercial paper, current borrowing capacity	$ 1,500.0
Debt Instrument, Term	397 days
Commercial paper, amount outstanding	$ 0.0
Commercial paper, average outstanding amount	$ 0.0

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Debt and Credit Agreements Cash Pooling (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Cash debt pooling arrangements, amount netted	$ 2,718.0	$ 2,411.2

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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 1,098.4	$ 938.0	$ 952.8
Weighted-average number of common shares outstanding, Basic	384.1	391.5	393.0
Restricted stock, stock options and other equity awards	1.8	3.6	5.4
Weighted-average number of common shares outstanding, Diluted	385.9	395.1	398.4
Basic	$ 2.86	$ 2.40	$ 2.42
Diluted	$ 2.85	$ 2.37	$ 2.39

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Acquisitions Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 03, 2022
Number of businesses acquired	2	0
Current year acquisitions/(dispositions)	$ 11.7
Business Acquisition, Percentage of Voting Interests Acquired				83.90%
Acquired finite-lived intangible assets related to acquisitions	8.5	$ 62.0
Acquisitions, net of cash acquired	(2.6)
Payments to Acquire Businesses, Net of Cash Acquired, including adjustments for prior period acquisitons	6.3	232.2	$ (0.0)
Interest income	140.8	56.6	$ 27.2
IAN
Current year acquisitions/(dispositions)	0.0	0.0
DXTRA
Current year acquisitions/(dispositions)	$ 0.0	$ 0.0
MD&E
Number of businesses acquired		1
Acquired finite-lived intangible assets related to acquisitions		$ 62.0
Acquisitions, net of cash acquired		232.2
Goodwill, Acquired During Period, Including Purchase Accounting Adjustments		$ 211.7
IA&C
Number of businesses acquired	1
SC&E
Number of businesses acquired	1

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Acquisitions Cash Paid for Acquisitions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Paid for Acquisitions [Abstract]
Cost of investment: current-year acquisitions	$ 5.8	$ 235.4	$ 0.0
Cost of investment: prior-year acquisitions	16.6	9.3	28.0
Less: net cash acquired	3.2	3.2	0.0
Total cost of investment	19.2	241.5	28.0
Operating payments	2.7	9.6	39.1
Total cash paid for acquisitions	21.9	251.1	67.1
Acquisitions, net of cash acquired	(2.6)
Payments for previous acquisition, financing cash flows	12.9	9.3	$ 28.0
Acquired finite-lived intangible assets related to acquisitions	$ 8.5	$ 62.0

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Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Redeemable Noncontrolling Interests
Balance at beginning of period	$ 38.3	$ 15.6	$ 93.1
Change in related noncontrolling interest balance	(0.3)	(0.5)	2.2
Changes in redemption value of redeemable noncontrolling interests:
Additions	7.4	30.3	0.0
Redemptions and other	(0.4)	(9.9)	(41.9)
Redemption value adjustments	(2.6)	3.0	(32.1)
Balance at end of period	$ 42.3	$ 38.3	$ 15.6

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Acquisitions Acxiom Acquisition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2023	Jan. 01, 2022
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,365.1	$ 1,360.3
Cash and Cash Equivalents, at Carrying Value	2,386.1	2,545.3
Accounts receivable, net of allowance	5,768.8	5,316.0
Accounts receivable, billable to clients	2,229.2	2,023.0
Other current assets	128.6	83.7
Property, Plant and Equipment, Net	636.7	637.4
Goodwill	5,080.9	5,050.6	$ 4,908.7	$ 5,050.6	$ 4,908.7
Other non-current assets	428.1	431.2
Contract liabilities	(684.7)	(680.0)
Other non-current liabilities	(532.4)	(572.6)
Net revenue	9,400.6	9,449.4	9,107.9
Net Income Attributable to Parent	1,098.4	938.0	$ 952.8
Customer Lists [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	882.1	873.1
know-how technology [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	239.5	239.2
Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	$ 227.3	$ 231.8

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Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 48.6	$ 68.5	$ 98.3
Charges to costs and expenses	7.2	(5.8)	(14.9)
Acquisitions/(dispositions)	(1.7)	(0.9)	(3.2)
Uncollectible accounts written off	(7.8)	(12.8)	(9.8)
Accounts Receivable, Allowance for Credit Loss, Recovery	0.1	1.9	0.3
Foreign currency translation adjustment	0.0	(2.3)	(2.2)
Balance at end of period	$ 46.4	$ 48.6	$ 68.5

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Supplementary Data Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Furniture and equipment	$ 632.8	$ 640.8
Leasehold improvements	507.0	528.6
Internal-use computer software	585.1	581.4
Land and buildings	136.7	131.4
Total property and equipment, gross	1,861.6	1,882.2
Less: accumulated depreciation and amortization	(1,224.9)	(1,244.8)
Total property and equipment, net	636.7	637.4
Depreciation	$ 180.3	$ 189.3	$ 197.6

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Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accrued Liabilities [Abstract]
Salaries, benefits and related expenses	$ 507.5	$ 554.0
Accrued Income Taxes	56.8	64.7
Interest	40.2	37.3
Office and related expenses	22.3	28.9
Acquisition obligations	2.9	18.7
Restructuring Reserve, Current	0.6	2.2
Other	75.5	81.3
Total accrued liabilities	$ 705.8	$ 787.1

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Other Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Nonoperating Income (Expense) [Abstract]
Loss on Extinguishment of Debt	$ 0.0	$ 0.0	$ 74.0
Net (gains) losses on sales of businesses	17.9	(11.3)	(19.4)
Other	(7.7)	10.3	22.7
Total other expense, net	10.2	(1.0)	(70.7)
Proceeds from Divestiture of Businesses, Net of Cash Divested	$ 58.7	$ (22.4)	$ (13.3)

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Share Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 07, 2024	Feb. 08, 2023	Feb. 10, 2022
Stock Repurchase Program, Authorized Amount				$ 320.0	$ 350.0	$ 400.0
Stock Repurchased During Period, Shares	10.4	10.3	0.0
Payments for Repurchase of Common Stock	$ 350.2	$ (320.1)	$ 0.0
Treasury Stock Acquired, Average Cost Per Share	$ 33.64	$ 31.01	$ 0
Excise and Sales Taxes	$ 2.5
2017 Share Repurchase Program
Stock repurchase program, remaining authorized repurchase amount	$ 80.1

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Goodwill (Details) - USD ($) $ in Millions			12 Months Ended
	Jan. 01, 2023	Jan. 01, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Goodwill	$ 5,050.6	$ 4,908.7	$ 5,080.9	$ 5,050.6	$ 4,908.7
Goodwill, Acquired/(Disposed) During Period			3.1	203.0
Goodwill, Transfers	0.0	0.0
Current year acquisitions/(dispositions)			11.7
Foreign currency and other			27.2	(61.1)
IAN
Goodwill
Goodwill	0.0	0.0	0.0	0.0	4,231.6
Goodwill, Transfers	0.0	(4,231.6)
Current year acquisitions/(dispositions)			0.0	0.0
Foreign currency and other			0.0	0.0
DXTRA
Goodwill
Goodwill	0.0	0.0	0.0	0.0	677.1
Goodwill, Transfers	0.0	(677.1)
Current year acquisitions/(dispositions)			0.0	0.0
Foreign currency and other			0.0	0.0
MD&E
Goodwill
Goodwill	2,668.2	2,293.0	2,677.5	2,487.6	0.0
Goodwill, Acquired/(Disposed) During Period			2.2	209.5
Goodwill, Transfers	180.6	2,293.0
Foreign currency and other			7.1	(14.9)
IA&C
Goodwill
Goodwill	1,698.0	1,920.2	1,723.2	1,878.6	0.0
Goodwill, Acquired/(Disposed) During Period			10.7	(6.5)
Goodwill, Transfers	(180.6)	1,920.2
Foreign currency and other			14.5	(35.1)
SC&E
Goodwill
Goodwill	684.4	695.5	680.2	684.4	$ 0.0
Goodwill, Acquired/(Disposed) During Period			(9.8)	0.0
Goodwill, Transfers	$ 0.0	$ 695.5
Foreign currency and other			$ 5.6	$ (11.1)

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Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Future amortization expense 2022	$ 83.1
Future amortization expense 2023	80.4
Future amortization expense 2024	78.4
Future amortization expense 2025	65.1
Future amortization expense 2026	49.8
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	84.0	$ 84.7	$ 86.2
Acquired finite-lived intangible assets related to acquisitions	8.5	62.0
Gross Amount	1,365.1	1,360.3
Accumulated Amortization	(621.5)	(542.2)
Net Amount	743.6	818.1
Impairment of Intangible Assets (Excluding Goodwill)	0.0
Indefinite-lived Intangible Assets (Excluding Goodwill)	165.7	165.4
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Amount	882.1	873.1
Accumulated Amortization	(431.6)	(378.4)
Net Amount	450.5	494.7
know-how technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	239.5	239.2
Accumulated Amortization	(138.9)	(111.1)
Net Amount	100.6	128.1
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	227.3	231.8
Accumulated Amortization	(45.7)	(47.4)
Net Amount	181.6	184.4
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	16.2	16.2
Accumulated Amortization	(5.3)	(5.3)
Net Amount	$ 10.9	$ 10.9
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years

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Components of Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income before income taxes, Domestic	$ 846.7	$ 707.4	$ 653.6
Income before income taxes, Foreign	561.3	561.5	568.5
Income before income taxes	$ 1,408.0	$ 1,268.9	$ 1,222.1
Effective Income Tax Rate Reconciliation, Percent	20.70%	25.10%	20.60%

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Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. federal income taxes (including foreign withholding taxes):
Current federal income taxes	$ 97.6	$ 168.0	$ 105.4
Deferred federal income taxes	(16.2)	(34.9)	13.2
Total federal income taxes	81.4	133.1	118.6
State and local income taxes:
Current state and local income taxes	40.4	40.4	27.4
Deferred state and local income taxes	4.3	(5.3)	(0.9)
Total state and local income taxes	44.7	35.1	26.5
Foreign income taxes:
Current foreign income taxes	148.1	137.0	127.2
Deferred foreign income taxes	17.0	13.2	(20.5)
Total foreign income taxes	165.1	150.2	106.7
Provision for income taxes	$ 291.2	$ 318.4	$ 251.8

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Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. federal statutory income tax rate		21.00%	21.00%	21.00%
Income tax provision at U.S. federal statutory rate		$ 295.7	$ 266.5	$ 256.6
State and local income taxes, net of federal income tax benefit		35.3	27.7	21.0
Impact of foreign operations, including withholding taxes		51.4	37.9	47.8
U.S. tax incentives		(24.4)	(23.0)	(28.4)
Change in net valuation allowance	[1]	(2.5)	8.0	(59.4)
Divestitures		0.5	1.1	1.1
Change in unrecognized tax benefits		(61.1)	3.5	13.2
Other		(3.7)	(3.3)	(0.1)
Provision for income taxes		$ 291.2	$ 318.4	$ 251.8
Effective income tax rate on operations		20.70%	25.10%	20.60%
Tax Adjustments, Settlements, and Unusual Provisions		$ (64.2)

[1] Reflects changes in valuation allowances that impacted the effective income tax rate for each year presented.

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Income Taxes Primary Impact on Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	20.70%	25.10%	20.60%
Previously unrecognized tax benefits	$ (64.2)

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Components of Deferred Tax Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 15.5	$ 12.4
Deferred compensation	65.1	78.1
Pension costs	0.4	6.7
Basis differences in fixed assets	0.0	0.0
Interest	18.1	38.7
Accruals and reserves	37.0	34.8
Allowance for doubtful accounts	11.3	12.5
Deferred Tax Assets, Property, Plant and Equipment	72.6	(6.3)
Basis differences in intangible assets	395.3	(369.8)
Deferred Tax Liabilities, ROU	252.8	(269.8)
Deferred Tax Liabilities, Leasing Arrangements	322.7	343.5
Tax loss/tax credit carry forwards	260.4	267.0
Prepaid expenses	11.4	(10.0)
Deferred revenue	1.8	(1.8)
Unremitted foreign earnings	7.0	(4.9)
Deferred Tax and Other Liabilities, Noncurrent	668.3	(656.3)
Other	71.1	43.3
Net deferred tax assets	874.2	843.3
Deferred Tax Assets, Valuation Allowance	(162.5)	(145.8)	$ (146.0)	$ (197.1)
Deferred Tax Assets, Net	43.4	41.2
Total deferred tax assets, net	711.7	697.5
Foreign Income Tax Expense (Benefit), Continuing Operations	165.1	150.2	$ 106.7
Deferred Tax Assets	265.0	271.7
Deferred Tax Liabilities	$ 221.6	$ 230.5

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Income Taxes Change in Valuation Allowances (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Summary of Valuation Allowances
Beginning balance		$ 145.8	$ 146.0	$ 197.1
Charged (reversed) to costs and expenses		13.8	8.9	(45.1)
Charged to gross tax assets and other accounts 1	[1]	(2.1)	0.6	0.9
Foreign currency translation		5.0	(9.7)	(6.9)
Ending balance		162.5	145.8	146.0
Foreign Income Tax Expense (Benefit), Continuing Operations		165.1	150.2	$ 106.7
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards		918.1
Undistributed Earnings of Foreign Subsidiaries		1,633.6	$ 1,496.9
Foreign Tax Authority
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration		834.3
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		83.8
State and Local Jurisdiction
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		$ 22.9

[1] Primarily represents changes to the valuation allowance related to the change of a corresponding deferred tax asset.

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Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Balance at beginning of period	$ 283.5	$ 262.6	$ 217.6
Increases as a result of tax positions taken during a prior year	50.9	4.9	17.2
Decreases as a result of tax positions taken during a prior year	(68.2)	(10.1)	(10.4)
Settlements with taxing authorities	(5.8)	(0.7)	(8.7)
Lapse of statutes of limitation	(11.4)	(6.4)	(6.2)
Increases as a result of tax positions taken during the current year	42.0	33.2	53.1
Balance at end of period	291.0	283.5	$ 262.6
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate	241.4
Income tax penalties and interest accrued	38.5	36.0
Income tax penalties and interest expense	2.5	6.0
Deferred Tax and Other Liabilities, Noncurrent	(668.3)	$ 656.3
Minimum [Member]
Income Tax Contingency [Line Items]
Anticipated decrease in unrecognized tax benefits	95.0
Maximum [Member]
Income Tax Contingency [Line Items]
Anticipated decrease in unrecognized tax benefits	$ 105.0

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Accumulated Other Comprehensive Loss, Net of Tax Changes in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative instruments, before reclassifications	$ 0.6	$ 17.5	$ 14.0
Total other comprehensive income, before reclassifications	44.1	(107.6)
Total reclassification from AOCI	3.4	8.1	10.1
Accumulated other comprehensive loss, net of tax	(946.2)	(993.7)	(894.2)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, before reclassifications	59.5	(130.2)
Foreign currency translation adjustment, amount reclassified from AOCI, net of tax	0.5	4.3
Foreign currency translation adjustment, net of tax	(789.1)	(849.1)	(723.2)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative instruments, before reclassifications	0.4	13.2
Derivative instruments, amount reclassified from AOCI, net of tax	(1.9)	(1.1)
Derivative Instruments, net of tax	33.5	35.0	22.9
Defined Benefit and Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Defined Benefit and Postretirement Plans, before reclassifications	(15.8)	9.4
Defined benefit and Postretirement Plans, amount reclassified from AOCI, net of tax	4.8	4.9
Pension and Other Postretirement Benefit Plans, net of tax	$ (190.6)	$ (179.6)	$ (193.9)

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Accumulated Other Comprehensive Loss, Net of Tax Reclassifications from AOCI, net of tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total income tax effect	$ (1.0)	$ (1.1)	$ (3.1)
Total reclassified from AOCI, net of tax	3.4	8.1	10.1
Foreign Currency Translation Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from AOCI, before tax	0.5	4.3	(1.0)
Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from AOCI, before tax	(2.6)	(1.4)	4.2
Defined Benefit and Postretirement Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from AOCI, before tax	$ 6.5	$ 6.3	$ 10.0

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Restructuring Charges (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) ft²	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 0.4	$ (0.1)	$ 0.4
Lease Restructuring Cost	(1.2)	85.4	6.3
Lease restructuring costs		85.4	6.3
Other Restructuring Costs	0.9	17.1	3.9
Restructuring Charges	0.1	102.4	10.6
Lease impairment costs 2020 plan	(0.3)	1.0	6.3
Other restructuring costs 2020 Plan	0.1	2.9	3.9
Other Restructuring Costs 2022 Real Estate Actions	0.8	14.2
Restructuring Charges 2020 Plan Reserve	0.6	2.3	9.4	$ 74.6
Restructuring Charges 2020 Plan	0.2	3.8	10.6
Restructuring Charges 2022 Real Estate Actions Reserve	0.0	0.0
Restructuring Charges 2022 Real Estate Actions	$ (0.1)	98.6
Area of Real Estate Property | ft²	500,000
Operating Lease, Impairment Loss 2022 Real Estate Action	$ (0.9)	84.4
MD&E
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(1.3)	69.1	0.1
Lease impairment costs 2020 plan	(0.3)	0.0	(0.9)
Restructuring Charges 2020 Plan	(0.3)	0.1	0.1
Restructuring Charges 2022 Real Estate Actions	(1.0)	69.0
Operating Lease, Impairment Loss 2022 Real Estate Action	(1.0)	54.3
IA&C
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.2	28.7	2.6
Lease impairment costs 2020 plan	0.0	7.0	(0.1)
Restructuring Charges 2020 Plan	0.5	7.7	2.6
Restructuring Charges 2022 Real Estate Actions	(0.3)	21.0
Operating Lease, Impairment Loss 2022 Real Estate Action	(0.5)	22.3
SC&E
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1.1	3.8	10.0
Lease impairment costs 2020 plan	0.0	(5.9)	7.3
Restructuring Charges 2020 Plan	0.0	(4.2)	10.0
Restructuring Charges 2022 Real Estate Actions	1.1	8.0
Operating Lease, Impairment Loss 2022 Real Estate Action	0.4	7.0
Corporate and Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0.1	0.8	(2.1)
Lease impairment costs 2020 plan	0.0	(0.1)	0.0
Restructuring Charges 2020 Plan	0.0	0.2	(2.1)
Restructuring Charges 2022 Real Estate Actions	0.1	0.6
Operating Lease, Impairment Loss 2022 Real Estate Action	0.2	0.8
Non-cash Items [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	0.0	0.0	0.3
Lease impairment costs 2020 plan	(0.3)	1.0	6.3
Other restructuring costs 2020 Plan	0.1	2.9	3.2
Other Restructuring Costs 2022 Real Estate Actions	0.2	13.5
Restructuring Charges 2020 Plan	(0.2)	3.9	9.8
Restructuring Charges 2022 Real Estate Actions	(0.7)	97.9
Operating Lease, Impairment Loss 2022 Real Estate Action	(0.9)	84.4
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	2.1	7.0	65.3
Lease impairment costs 2020 plan	0.0	0.0	0.0
Other restructuring costs 2020 Plan	0.0	0.0	0.7
Other Restructuring Costs 2022 Real Estate Actions	0.6	0.7
Restructuring Charges 2020 Plan	2.1	7.0	66.0
Restructuring Charges 2022 Real Estate Actions	0.6	0.7
Operating Lease, Impairment Loss 2022 Real Estate Action	0.0	0.0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs 2022 Real Estate Actions Reserve	0.0	0.0
Other restructuring costs reserve 2020 plan	0.0	0.0	0.0	0.0
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0	0.0
Lease impairment costs reserve 2020 Plan	0.0	0.0	0.0	0.0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0.6	$ 2.3	$ 9.4	$ 74.6

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Restructuring and Related Activities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) ft²	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 0.4	$ (0.1)	$ 0.4
Lease Restructuring Cost	(1.2)	85.4	6.3
Other Restructuring Costs	0.9	17.1	3.9
Restructuring Charges	$ 0.1	102.4	10.6
Area of Real Estate Property | ft²	500,000
Non-cash Items [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 0.0	0.0	0.3
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	2.1	7.0	65.3
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.6	2.3	$ 9.4	$ 74.6
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 0.0	$ 0.0

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Plan Information (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Deferred Compensation Liability, Current and Noncurrent	$ 126.5	$ 141.1
Incentive compensation plan initiation year	2019
2019 PIP target performance cash award percentage range	range from 0% to 300% of the target amount
2019 PIP target award percentage range - Executives	0% to 200%
Number of shares initially available for grant	27.0
Maximum shares participants are eligible to receive	2.0
Maximum cash award per employee	$ 10.0
Vesting period in which the fair value of shares on grant date is amortized over, years	2 years

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Stock Based Compensation Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-based Payment Award
Stock-based compensation expense		$ 52.9	$ 55.7	$ 84.8
Tax benefit		12.5	13.1	18.0
Stock-settled awards
Stock-based Payment Award
Stock-based compensation expense		27.8	26.3	36.7
Cash-settled awards
Stock-based Payment Award
Stock-based compensation expense		0.3	0.3	1.0
Performance-based awards
Stock-based Payment Award
Stock-based compensation expense		18.9	23.7	33.4
Employee stock purchase plan
Stock-based Payment Award
Stock-based compensation expense		2.9	3.1	2.1
Other
Stock-based Payment Award
Stock-based compensation expense	[1]	2.7	2.0	11.3
Equity Option
Stock-based Payment Award
Stock-based compensation expense		$ 0.3	$ 0.3	$ 0.3

[1] Represents charges recorded for severance expense related to stock-based compensation awards.

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Incentive Compensation Plans Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-based Payment Award
Intrinsic value of stock options exercised	$ 0.0	$ 0.0	$ 8.8
Proceeds from stock options exercised including taxes withheld	0.0	0.0	12.2
Tax withheld on stock options received	$ 0.0	$ 0.0	$ 4.2
Award Vesting Period - Maximum	3 years
Employee Stock Option
Stock-based Payment Award
Stock options outstanding as of January 1, 2018	0.3
Stock options outstanding as of Jan 1, 2018, Weighted-average exercise price	$ 23.30
Exercised	0.0	0.0	(0.6)
Exercised, weighted-average exercise price	$ 12.77
Stock options outstanding as of December 31, 2018	0.3	0.3
Stock options outstanding as of Dec 31, 2018, Weighted-average exercise price	$ 23.33	$ 23.30
Options outstanding, weighted average remaining contractual term	7 years
Stock options outstanding, aggregate intrinsic value	$ 2.3
Performance-based awards
Stock-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0.0	0.0	0.3

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Share-based Compensation Awards (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-based Payment Award
Vesting period in which the fair value of shares on grant date is amortized over, years	2 years
Stock-settled awards
Stock-based Payment Award
Awards granted	1.4	1.3	0.9
Weighted-average grant-date fair value (per award)	$ 35.54	$ 36.36	$ 26.96
Total fair value of vested awards distributed	$ 60.8	$ 59.7	$ 50.8
Accrued dividends on non-vested stock-settled awards	3.0	3.7
Dividends paid for stock-settled awards	$ 5.3	$ 4.9
Cash-settled awards
Stock-based Payment Award
Awards granted	0.0	0.0	0.0
Weighted-average grant-date fair value (per award)	$ 35.71	$ 36.53	$ 0.0
Total fair value of vested awards distributed	$ 0.8	$ 0.8	$ 0.7
Performance-based awards
Stock-based Payment Award
Awards granted	2.1	1.6	0.5
Weighted-average grant-date fair value (per award)	$ 26.31	$ 29.95	$ 21.98
Total fair value of vested awards distributed	$ 84.8	$ 54.5	$ 39.3

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Non-vested Award Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-settled awards
Stock-based Payment Award
Non-vested as of January 1, 2018	3.5
Nonvested as of January 1, 2018, weighted-average grant date fair value	$ 27.52
Granted	1.4
Granted, Weighted-average grant-date fair value	$ 35.54	$ 36.36	$ 26.96
Vested	(1.7)
Vested, Weighted-average grant date fair value	$ 21.92
Forfeited	(0.4)
Forfeited, Weighted-average grant date fair value	$ 31.04
Non-vested as of December 31, 2018	2.9	3.5
Nonvested as of December 31, 2018, weighted-average grant date fair value	$ 34.20	$ 27.52
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Reinstated in Period, Weighted Average Grant Date Fair Value	$ 29.25
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Other	0.1
Total unrecognized compensation expense remaining	$ 47.9
Weighted-average years expected to be recognized over	1 year 4 months 24 days
Cash-settled awards
Stock-based Payment Award
Non-vested as of January 1, 2018	0.0
Nonvested as of January 1, 2018, weighted-average grant date fair value	$ 27.96
Granted	0.0
Granted, Weighted-average grant-date fair value	$ 35.71	$ 36.53	$ 0.0
Vested	0.0
Vested, Weighted-average grant date fair value	$ 21.02
Forfeited	0.0
Forfeited, Weighted-average grant date fair value	$ 34.96
Non-vested as of December 31, 2018	0.0	0.0
Nonvested as of December 31, 2018, weighted-average grant date fair value	$ 36.05	$ 27.96
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Reinstated in Period, Weighted Average Grant Date Fair Value	$ 0.0
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Other	0.0
Total unrecognized compensation expense remaining	$ 0.7
Weighted-average years expected to be recognized over	1 year 8 months 12 days
Cash awards granted during the period target value	$ 20.4	$ 19.9	$ 85.8
Incentive compensation expense, non share-based	$ 31.5	$ 42.0	$ 47.8
Performance-based awards
Stock-based Payment Award
Non-vested as of January 1, 2018	2.9
Nonvested as of January 1, 2018, weighted-average grant date fair value	$ 24.31
Granted	2.1
Granted, Weighted-average grant-date fair value	$ 26.31	$ 29.95	$ 21.98
Vested	(2.4)
Vested, Weighted-average grant date fair value	$ 18.03
Forfeited	(0.3)
Forfeited, Weighted-average grant date fair value	$ 27.82
Non-vested as of December 31, 2018	2.3	2.9
Nonvested as of December 31, 2018, weighted-average grant date fair value	$ 32.09	$ 24.31
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Reinstated in Period, Weighted Average Grant Date Fair Value	$ 33.26
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Other	0.0
Total unrecognized compensation expense remaining	$ 34.1
Weighted-average years expected to be recognized over	1 year 9 months 18 days
Cash awards granted during the period target value	$ 46.2	$ 46.0	$ 40.4
Incentive compensation expense, non share-based	$ 38.0	$ 44.7	$ 52.1

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Incentive Compensation Plans Employee Stock Purchase Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2015
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Maximum employee subscription rate	10.00%
Maximum number of shares per employee	900
Employee stock purchase plan description	90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months
Employee Stock Purchase Plan, stock issued, shares	600,000	3,000,000.0
Employee Stock Purchase Plan, stock reserved for issuance, shares	10,000,000.0
Stock Issued During Period, Shares, Employee Stock Ownership Plan	3,100,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 18.7

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Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Fair value assets and liabilities measured on recurring basis
Cash equivalents		$ 1,521.5	$ 1,688.1
Contingent acquisition obligations	[1]	3.1	21.6
Contingent acquisition obligation, total change		$ (18.5)
Discount rate floor contingent acquisition obligations		3.00%
Level 1
Fair value assets and liabilities measured on recurring basis
Cash equivalents		$ 1,521.5	1,688.1
Contingent acquisition obligations	[1]	0.0	0.0
Level 2
Fair value assets and liabilities measured on recurring basis
Cash equivalents		0.0	0.0
Contingent acquisition obligations	[1]	0.0	0.0
Level 3
Fair value assets and liabilities measured on recurring basis
Cash equivalents		0.0	0.0
Contingent acquisition obligations		$ 3.1	$ 21.6

[1] Contingent acquisition obligations includes deferred acquisition payments and unconditional obligations to purchase additional non-controlling equity shares of consolidated subsidiaries. Fair value measurement of the obligations is based upon actual and projected operating performance targets as specified in the related agreements. The decrease in this balance of $18.5 from December 31, 2022 to December 31, 2023 is primarily due to payments related to our deferred acquisitions from prior-year acquisitions and valuation adjustments, partially offset by the addition of a new contingent acquisition obligation and the exercises of redeemable non-controlling interest. The amounts payable within the next twelve months are classified in accrued liabilities; any amounts payable thereafter are classified in other non-current liabilities.

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Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 2,975.3	$ 2,552.3
Discount rate ceiling contingent acquisition obligations	6.00%
Level 1
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 0.0	0.0
Level 2
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	2,974.5	2,551.5
Level 3
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 0.8	$ 0.8

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Employee Benefits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Pension, Significant, Plan Contribution	$ 46.0
Retirement Benefits, Description [Abstract]
Number of participants domestic pension plan	2,700
Number of participants postretirement benefit plan	1,400
Deferred Compensation Arrangements [Abstract]
Deferred compensation and benefit liability balance	$ 126.5	$ 141.1
Deferred compensation and benefit arrangement expense	10.7	2.1	$ 8.8
Cash Surrender Value of Life Insurance	164.7	161.2
Long-Term Disability Plan [Abstract]
Long-term disability plan obligation	5.3	$ 5.4
Long term disability plan, income replacement benefit obligation	0.0
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan buyout non-cash settlement charge, net of tax	180.0
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan buyout non-cash settlement charge, net of tax	$ 200.0

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Pension and Postretirement Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Benefit Obligation [Roll Forward]
Domestic Pension Plan Discount Rate	5.40%	5.65%
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	$ 367.6
Fair Value of Plan Assets (Period End)	$ 428.7	$ 367.6
Pension plans with underfunded or unfunded accumulated benefit obligation
Foreign Pension Plan Discount Rate	4.32%	4.62%
Domestic Plan [Member]
Benefit Obligation [Roll Forward]
Benefit obligation (period start)	$ 75.0	$ 104.1
Service cost	0.0	0.0	$ 0.0
Interest cost	4.0	2.8	2.9
Benefits Paid	(8.2)	(9.0)
Plan participant contributions	0.0	0.0
Actuarial losses (gains)	1.0	23.0
Settlements and curtailments	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(0.0)	(0.1)
Foreign currency effect	0.0	0.0
Benefit Obligation (Period End)	71.8	75.0	104.1
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	70.5	98.1
Actual return on plan assets	6.7	(18.6)
Plan participant contributions	0.0	0.0
Employer contributions	0.0	0.0
Benefits paid	(8.2)	(9.0)
Settlements	0.0	0.0
Foreign currency effect	0.0	0.0
Fair Value of Plan Assets (Period End)	69.0	70.5	$ 98.1
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(2.8)	(4.5)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0.0	0.0
Current liability	0.0	0.0
Non-current liability	(2.8)	(4.5)
Net liability recognized	(2.8)	(4.5)
Accumulated benefit obligation	71.8	75.0
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	41.1	44.4
Prior service cost (credit)	0.0	0.1
Total amount recognized	41.1	44.5
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	71.8	75.0
Aggregate accumulated benefit obligation	71.8	75.0
Aggregate fair value of plan assets	$ 69.0	$ 70.5
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.40%	5.65%	2.95%
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	$ 71.8	$ 75.0
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	71.8	75.0
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	69.0	70.5
Foreign Plan [Member]
Benefit Obligation [Roll Forward]
Benefit obligation (period start)	334.2	546.0
Service cost	2.2	4.6	$ 4.5
Interest cost	15.6	8.9	8.0
Benefits Paid	(18.9)	(20.9)
Plan participant contributions	0.0	0.0
Actuarial losses (gains)	6.8	153.3
Settlements and curtailments	(2.5)	0.0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(0.0)	(0.0)
Foreign currency effect	17.4	(51.1)
Benefit Obligation (Period End)	354.8	334.2	546.0
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	297.1	484.8
Actual return on plan assets	5.3	(134.8)
Plan participant contributions	0.0	0.0
Employer contributions	61.4	16.4
Benefits paid	(18.9)	(20.9)
Settlements	(2.5)	0.0
Foreign currency effect	17.3	(48.4)
Fair Value of Plan Assets (Period End)	359.7	297.1	$ 484.8
Defined Benefit Plan, Funded (Unfunded) Status of Plan	4.9	(37.1)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	59.8	17.8
Current liability	(7.0)	(5.1)
Non-current liability	(47.9)	(49.8)
Net liability recognized	4.9	(37.1)
Accumulated benefit obligation	351.2	328.2
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	157.7	134.6
Prior service cost (credit)	0.4	0.6
Total amount recognized	158.1	135.2
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	55.8	67.4
Aggregate accumulated benefit obligation	53.7	62.4
Aggregate fair value of plan assets	$ 1.0	$ 12.5
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.32%	4.62%	1.86%
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	$ 66.0	$ 67.4
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	63.5	62.4
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	11.1	12.5
Other Postretirement Benefits Plan [Member]
Benefit Obligation [Roll Forward]
Benefit obligation (period start)	17.9	24.2
Service cost	0.0	0.0	$ 0.0
Interest cost	0.9	0.6	0.7
Benefits Paid	(5.1)	(4.8)
Plan participant contributions	1.8	1.9
Actuarial losses (gains)	(0.6)	4.0
Settlements and curtailments	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(0.0)	(0.0)
Foreign currency effect	0.0	0.0
Benefit Obligation (Period End)	16.1	17.9	24.2
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	0.0	0.0
Actual return on plan assets	0.0	0.0
Plan participant contributions	1.8	1.9
Employer contributions	3.3	2.9
Benefits paid	(5.1)	(4.8)
Settlements	0.0	0.0
Foreign currency effect	0.0	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0	$ 0.0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(16.1)	(17.9)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0.0	0.0
Current liability	(1.9)	(2.0)
Non-current liability	(14.2)	(15.9)
Net liability recognized	(16.1)	(17.9)
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	1.7	1.1
Prior service cost (credit)	0.0	0.0
Total amount recognized	$ 1.7	$ 1.1
Pension plans with underfunded or unfunded accumulated benefit obligation
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.40%	5.65%	2.90%

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Net Periodic Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Net Periodic Benefit Cost
Curtailment and settlement	$ 0.3	$ (0.0)	$ (0.6)
Domestic Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	0.0	0.0	0.0
Interest cost	4.0	2.8	2.9
Expected return on plan assets	(4.0)	(4.7)	(5.6)
Curtailment and settlement	0.0	0.0	1.5
Amortization of:
Prior service cost (credit)	0.1	0.0	0.0
Net actuarial losses	1.6	1.4	1.7
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1.7	$ (0.5)	$ 0.5
Discount rate	5.65%	2.95%	2.60%
Expected return on plan assets	6.00%	5.00%	5.75%
Interest crediting rate	5.10%	5.10%	5.10%
Discount rate	5.40%	5.65%	2.95%
Interest crediting rate	5.10%	5.10%	5.10%
Foreign Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 2.2	$ 4.6	$ 4.5
Interest cost	15.6	8.9	8.0
Expected return on plan assets	(17.0)	(19.8)	(20.8)
Curtailment and settlement	(0.3)	0.0	(0.9)
Amortization of:
Prior service cost (credit)	0.1	0.1	0.1
Net actuarial losses	5.0	4.4	6.7
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 5.6	$ (1.8)	$ (2.4)
Discount rate	4.62%	1.86%	1.35%
Rate of compensation increase	2.80%	2.65%	2.47%
Expected return on plan assets	5.62%	4.47%	4.47%
Interest crediting rate	1.50%	1.50%	1.50%
Discount rate	4.32%	4.62%	1.86%
Rate of compensation increase	3.35%	2.80%	2.65%
Interest crediting rate	1.50%	1.50%	1.50%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	0.9	0.6	0.7
Expected return on plan assets	0.0	0.0	0.0
Curtailment and settlement	0.0	0.0	0.0
Amortization of:
Prior service cost (credit)	0.0	0.0	0.0
Net actuarial losses	0.0	0.4	0.9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 0.9	$ 1.0	$ 1.6
Discount rate	5.65%	2.90%	2.50%
Discount rate	5.40%	5.65%	2.90%
Health care cost trend rate assumed for next year	6.50%	6.75%	6.50%
Year ultimate rate is reached	2030	2030	2028
Ultimate rate	5.00%	5.00%	5.00%

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Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	$ 367.6
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3	314.5	$ (22.3)
Fair Value of Plan Assets (Period End)	428.7	367.6
Investment funds
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	10.6
Fair Value of Plan Assets (Period End)	6.7	10.6
Limited partnerships
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Fixed income securities
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	12.5
Fair Value of Plan Assets (Period End)	9.2	12.5
Insurance contracts
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	1.6
Fair Value of Plan Assets (Period End)	335.8	1.6
Other plan assets
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	11.9
Fair Value of Plan Assets (Period End)	10.7	11.9
Total plan assets subject to leveling
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	36.6
Fair Value of Plan Assets (Period End)	362.4	36.6
Investments measured at net asset value
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	331.0
Fair Value of Plan Assets (Period End)	106.5	331.0
Non-benefit obligation liabilities
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	(40.2)	0.0
Level 1 | Investment funds
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	10.6
Fair Value of Plan Assets (Period End)	6.7	10.6
Level 1 | Limited partnerships
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 1 | Fixed income securities
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	12.5
Fair Value of Plan Assets (Period End)	9.2	12.5
Level 1 | Insurance contracts
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 1 | Other plan assets
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	11.9
Fair Value of Plan Assets (Period End)	10.7	11.9
Level 1 | Total plan assets subject to leveling
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	35.0
Fair Value of Plan Assets (Period End)	26.6	35.0
Level 2 | Investment funds
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 2 | Limited partnerships
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 2 | Fixed income securities
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 2 | Insurance contracts
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	1.6
Fair Value of Plan Assets (Period End)	1.4	1.6
Level 2 | Other plan assets
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 2 | Total plan assets subject to leveling
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	1.6
Fair Value of Plan Assets (Period End)	1.4	1.6
Level 3 | Investment funds
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 3 | Limited partnerships
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0	24.0
Actual return on plan assets	19.9	(1.7)
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 3 | Fixed income securities
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 3 | Insurance contracts
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	334.4	0.0
Level 3 | Other plan assets
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	0.0	0.0
Level 3 | Total plan assets subject to leveling
Fair value assets and liabilities measured on recurring basis
Fair Value of Plan Assets (Period Start)	0.0
Fair Value of Plan Assets (Period End)	$ 334.4	$ 0.0

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Employee Benefits Allocation of Plan Assets (Details)	Dec. 31, 2023	Dec. 31, 2022
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	100.00%
Defined benefit plan, actual plan asset allocations	100.00%	100.00%
Alternative Investments
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	0.00%
Defined benefit plan, actual plan asset allocations	0.00%	18.00%
Equity securities
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	6.00%
Defined benefit plan, actual plan asset allocations	5.00%	14.00%
Fixed income securities
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	15.00%
Defined benefit plan, actual plan asset allocations	16.00%	26.00%
Liability driven investments
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	0.00%
Defined benefit plan, actual plan asset allocations	0.00%	28.00%
Real estate
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	1.00%
Defined benefit plan, actual plan asset allocations	1.00%	14.00%
Insurance, Other
Allocation of Plan Assets
Defined benefit plan, plan assets, target allocation, percentage	78.00%
Defined benefit plan, actual plan asset allocations	78.00%	0.00%

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Pension Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans
Estimated U.S. federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003, no more than	$ 0.2
Domestic Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	0.0	$ 0.0
Defined benefit plan, estimated future employer contributions in next fiscal year	0.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected future benefit payments in 2019	8.0
Expected future benefit payments in 2020	7.2
Expected future benefit payments in 2021	6.9
Expected future benefit payments in 2022	6.9
Expected future benefit payments in 2023	6.4
Expected future benefit payments in 2024-2025	27.4
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	61.4	16.4
Defined benefit plan, estimated future employer contributions in next fiscal year	10.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected future benefit payments in 2019	22.6
Expected future benefit payments in 2020	22.0
Expected future benefit payments in 2021	21.6
Expected future benefit payments in 2022	21.1
Expected future benefit payments in 2023	21.6
Expected future benefit payments in 2024-2025	108.4
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	3.3	$ 2.9
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected future benefit payments in 2019	1.6
Expected future benefit payments in 2020	1.5
Expected future benefit payments in 2021	1.4
Expected future benefit payments in 2022	1.7
Expected future benefit payments in 2023	1.6
Expected future benefit payments in 2024-2025	$ 6.3

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Savings Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Domestic Tax Authority
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	$ 62.8	$ 77.5	$ 65.1
Discretionary Company Contribution
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	0.0	9.3	8.0
Defined Contribution Plans Participant Forfeitures
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	5.8	6.3	8.5
Foreign Tax Authority
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	$ 62.5	$ 58.2	$ 59.7

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Segment Operations (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) numberOfPeople	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segments:
Number of Reportable Segments | numberOfPeople	3
EBITA	$ 1,566.6	$ 1,465.9	$ 1,522.4
Total (expenses) and other income	(74.6)	(112.3)	(214.1)
Total revenue	10,889.3	10,927.8	10,240.7
Net revenue	9,400.6	9,449.4	9,107.9
Operating Income (Loss)	1,482.6	1,381.2	1,436.2
Amortization of Intangible Assets	84.0	84.7	86.2
Interest expense	(225.6)	(167.9)	(170.6)
Interest income	140.8	56.6	27.2
Other income (expense), net	10.2	(1.0)	(70.7)
Income before income taxes	1,408.0	1,268.9	1,222.1
Depreciation and amortization	180.3	189.3	197.6
Capital expenditures	179.3	178.1	195.3
Assets	19,267.3	18,811.7
Restructuring Charges	0.1	102.4	10.6
Corporate and Other
Segments:
EBITA	(72.3)	(94.5)	(129.4)
Amortization of Intangible Assets	0.0	0.0	0.0
Depreciation and amortization	5.0	6.6	9.2
Capital expenditures	32.0	29.6	30.0
Assets	1,938.8	2,114.0
Restructuring Charges	0.1	0.8	(2.1)
MD&E
Segments:
EBITA	832.4	744.5	865.3
Total revenue	4,394.8	4,381.6	4,196.6
Net revenue	4,326.5	4,296.9	4,117.7
Amortization of Intangible Assets	77.3	72.8	71.9
Depreciation and amortization	105.8	107.4	108.0
Capital expenditures	100.1	97.4	99.7
Assets	10,715.4	9,984.3
Restructuring Charges	(1.3)	69.1	0.1
IA&C
Segments:
EBITA	541.3	581.4	597.9
Total revenue	4,002.2	4,140.6	4,041.8
Net revenue	3,633.2	3,766.3	3,679.7
Amortization of Intangible Assets	4.3	7.2	10.4
Depreciation and amortization	53.6	58.4	62.7
Capital expenditures	40.8	43.8	57.5
Assets	4,812.5	5,083.5
Restructuring Charges	0.2	28.7	2.6
SC&E
Segments:
EBITA	265.2	234.5	188.6
Total revenue	2,492.3	2,405.6	2,002.3
Net revenue	1,440.9	1,386.2	1,310.5
Amortization of Intangible Assets	2.4	4.7	3.9
Depreciation and amortization	15.9	16.9	17.7
Capital expenditures	6.4	7.3	8.1
Assets	1,800.6	1,629.9
Restructuring Charges	$ 1.1	$ 3.8	$ 10.0

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Segment Information Major Geographic Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues and Long-Lived Assets
Long-Lived Assets	$ 2,227.3	$ 2,346.1
Net revenue	9,400.6	9,449.4	$ 9,107.9
Domestic
Revenues and Long-Lived Assets
Long-Lived Assets	1,546.0	1,676.7
Total International
Revenues and Long-Lived Assets
Long-Lived Assets	681.3	669.4
Net revenue	3,298.4	3,291.7	3,344.8
United Kingdom
Revenues and Long-Lived Assets
Long-Lived Assets	290.1	254.8
Net revenue	759.2	742.2	781.5
Continental Europe
Revenues and Long-Lived Assets
Long-Lived Assets	84.7	87.6
Net revenue	795.7	764.6	799.7
Asia Pacific
Revenues and Long-Lived Assets
Long-Lived Assets	163.2	176.5
Net revenue	729.8	772.7	791.4
Latin America
Revenues and Long-Lived Assets
Long-Lived Assets	59.0	61.6
Net revenue	448.7	423.6	396.4
Other
Revenues and Long-Lived Assets
Long-Lived Assets	84.3	88.9
Net revenue	$ 565.0	$ 588.6	$ 575.8

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Guarantees (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Parent company guarantees on lease obligations	$ 678.1	$ 797.3
Parent company guarantees relating to credit facilities	255.7	276.4
Cash pooling guarantees	85.5	$ 101.3
Assets pledged as security for parent company guarantees	$ 0.0

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Contingent Acquisition Obligations (Details) $ in Millions	Dec. 31, 2023 USD ($)
Deferred acquisition payments
Business Acquisition, Contingent Consideration [Line Items]
Future contingent acquisition obligation due in 2018	$ 2.9
Future contingent acquisition obligation due in 2019	0.1
Future contingent acquisition obligation due in 2020	0.1
Future contingent acquisition obligation due in 2021	0.0
Future contingent acquisition obligation due in 2022	0.0
Future contingent acquisition obligation due thereafter	0.0
Future contingent acquisition obligation due, total	3.1
Redeemable noncontrolling interests and call options with affiliates
Business Acquisition, Contingent Consideration [Line Items]
Future contingent acquisition obligation due in 2018	9.7
Future contingent acquisition obligation due in 2019	17.4
Future contingent acquisition obligation due in 2020	19.9
Future contingent acquisition obligation due in 2021	28.7
Future contingent acquisition obligation due in 2022	0.0
Future contingent acquisition obligation due thereafter	0.0
Future contingent acquisition obligation due, total	75.7
Redeemable at noncontrolling equity owners discretion
Business Acquisition, Contingent Consideration [Line Items]
Future contingent acquisition obligation due in 2018	1.4
Total contingent acquisition payments
Business Acquisition, Contingent Consideration [Line Items]
Future contingent acquisition obligation due in 2018	12.6
Future contingent acquisition obligation due in 2019	17.5
Future contingent acquisition obligation due in 2020	20.0
Future contingent acquisition obligation due in 2021	28.7
Future contingent acquisition obligation due in 2022	0.0
Future contingent acquisition obligation due thereafter	0.0
Future contingent acquisition obligation due, total	$ 78.8

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Results by Quarter (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 9,400.6	$ 9,449.4	$ 9,107.9
Billable expenses	1,488.7	1,478.4	1,132.8
Total revenue	10,889.3	10,927.8	10,240.7
Salaries and related expenses	6,243.9	6,258.3	5,975.4
Office and other direct expenses	1,342.5	1,346.4	1,279.6
Billable expense	1,488.7	1,478.4	1,132.8
Cost of services	9,075.1	9,083.1	8,387.8
Depreciation and amortization	264.3	274.0	283.8
Restructuring Charges	0.1	102.4	10.6
Total operating expenses	9,406.7	9,546.6	8,804.5
Operating Income (Loss)	1,482.6	1,381.2	1,436.2
Net losses on sales of businesses	17.9	(11.3)	(19.4)
Tax Adjustments, Settlements, and Unusual Provisions	(64.2)
Total (expenses) and other income	(74.6)	(112.3)	(214.1)
NET INCOME	$ 1,118.1	$ 956.1	$ 972.8
Earnings per share, Basic	$ 2.86	$ 2.40	$ 2.42
Earnings per share, Diluted	$ 2.85	$ 2.37	$ 2.39

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Subsequent Events (Details)	Feb. 08, 2024 $ / shares
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends payable, amount per share	$ 0.330