Basis of Presentation and Nature of Business	12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Nature of Business	1. Basis of Presentation and Nature of Business Alight delivers human capital management solutions to many of the world’s largest and most complex companies. This includes the implementation and administration of both employee wellbeing (e.g. health, wealth and leaves benefits) and global payroll solutions. In addition, the Company implements and runs human capital management software platforms on behalf of third-party providers. On July 2, 2021 (the “Closing Date”), Alight Holding Company, LLC (the “Predecessor” or “Alight Holdings”) completed a business combination (the “Business Combination”) with a special purpose acquisition company. On the Closing Date, pursuant to the Business Combination Agreement, the special purpose acquisition company became a wholly owned subsidiary of Alight, Inc. (“Alight”, “the Company”, “we” “us” “our” or the “Successor”). As of December 31, 2023, Alight owned 95% of the economic interest in the Predecessor, had 100% of the voting power and controlled the management of the Predecessor. The non-voting ownership percentage held by noncontrolling interest was approximately 5% as of December 31, 2023. Basis of Presentation As a result of the Business Combination, for accounting purposes, the Company is the acquirer and Alight Holdings is the acquiree and accounting predecessor. While the Closing Date was July 2, 2021, we determined the impact of one day would be immaterial to the results of operations. As such, we utilized July 1, 2021 as the date of the Business Combination for accounting purposes. Therefore, the financial statement presentation includes the financial statements of Alight Holdings as Predecessor for the periods prior to July 1, 2021 and the Company as Successor for the periods including and after July 1, 2021, including the consolidation of Alight Holdings. In the opinion of management, all adjustments, including normal recurring adjustments, considered necessary for a fair presentation have been included. All intercompany transactions and balances have been eliminated upon consolidation. Segment Reporting Effective January 1, 2023, the Company's former Hosted business revenues and gross margin are reported in Other as the business is no longer core to the Company’s operations. There is no change in composition among the Employer Solutions and Professional Services segments. Additionally, the Company changed its measure of segment profit and loss that is reported to the chief operating decision maker ("CODM") for purposes of making decisions about allocating resources to the Company’s segments and assessing business performance. See Note 12 “Segment Reporting” for additional information. Nature of Business We are a leading cloud-based provider of integrated digital human capital and business solutions. We have an unwavering belief that a company’s success starts with its people, and our solutions connect human insights with technology. The Alight Worklife® employee engagement platform provides a seamless customer experience by combining content, plus artificial intelligence (“AI”) and data analytics to enable Alight’s business process as a service ("BPaaS") model. Our mission-critical solutions enable employees to enrich their health, wealth and wellbeing which helps global organizations achieve a high-performance culture. Our solutions include: • Employer Solutions: are driven by our Alight Worklife platform, and include total employee wellbeing, integrated benefits administration, healthcare navigation, financial wellbeing, leave of absence management, retiree healthcare and payroll. We leverage data across all interactions and activities to improve the employee experience, reduce operational costs and better inform management processes and decision-making. Our clients’ employees benefit from an integrated platform and user experience, coupled with a full-service customer care center, helping them manage the full life cycle of their health wealth and wellbeing. • Professional Services: includes our project-based cloud deployment and consulting offerings that provide expertise with both human capital and financial platforms. Specifically, this includes cloud advisory and deployment, and optimization services for cloud platforms such as Workday, SAP SuccessFactors, Oracle, and Cornerstone OnDemand.

Basis of Presentation and Nature of Business

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Nature of Business

1. Basis of Presentation and Nature of Business

Alight delivers human capital management solutions to many of the world’s largest and most complex companies. This includes the implementation and administration of both employee wellbeing (e.g. health, wealth and leaves benefits) and global payroll solutions. In addition, the Company implements and runs human capital management software platforms on behalf of third-party providers.

On July 2, 2021 (the “Closing Date”), Alight Holding Company, LLC (the “Predecessor” or “Alight Holdings”) completed a business combination (the “Business Combination”) with a special purpose acquisition company. On the Closing Date, pursuant to the Business Combination Agreement, the special purpose acquisition company became a wholly owned subsidiary of Alight, Inc. (“Alight”, “the Company”, “we” “us” “our” or the “Successor”). As of December 31, 2023, Alight owned 95% of the economic interest in the Predecessor, had 100% of the voting power and controlled the management of the Predecessor. The non-voting ownership percentage held by noncontrolling interest was approximately 5% as of December 31, 2023.

Basis of Presentation

As a result of the Business Combination, for accounting purposes, the Company is the acquirer and Alight Holdings is the acquiree and accounting predecessor. While the Closing Date was July 2, 2021, we determined the impact of one day would be immaterial to the results of operations. As such, we utilized July 1, 2021 as the date of the Business Combination for accounting purposes. Therefore, the financial statement presentation includes the financial statements of Alight Holdings as Predecessor for the periods prior to July 1, 2021 and the Company as Successor for the periods including and after July 1, 2021, including the consolidation of Alight Holdings. In the opinion of management, all adjustments, including normal recurring adjustments, considered necessary for a fair presentation have been included. All intercompany transactions and balances have been eliminated upon consolidation.

Segment Reporting

Effective January 1, 2023, the Company's former Hosted business revenues and gross margin are reported in Other as the business is no longer core to the Company’s operations. There is no change in composition among the Employer Solutions and Professional Services segments. Additionally, the Company changed its measure of segment profit and loss that is reported to the chief operating decision maker ("CODM") for purposes of making decisions about allocating resources to the Company’s segments and assessing business performance. See Note 12 “Segment Reporting” for additional information.

Nature of Business

We are a leading cloud-based provider of integrated digital human capital and business solutions. We have an unwavering belief that a company’s success starts with its people, and our solutions connect human insights with technology. The Alight Worklife® employee engagement platform provides a seamless customer experience by combining content, plus artificial intelligence (“AI”) and data analytics to enable Alight’s business process as a service ("BPaaS") model. Our mission-critical solutions enable employees to enrich their health, wealth and wellbeing which helps global organizations achieve a high-performance culture. Our solutions include:

•

Employer Solutions: are driven by our Alight Worklife platform, and include total employee wellbeing, integrated benefits administration, healthcare navigation, financial wellbeing, leave of absence management, retiree healthcare and payroll. We leverage data across all interactions and activities to improve the employee experience, reduce operational costs and better inform management processes and decision-making. Our clients’ employees benefit from an integrated platform and user experience, coupled with a full-service customer care center, helping them manage the full life cycle of their health wealth and wellbeing.

•

Professional Services: includes our project-based cloud deployment and consulting offerings that provide expertise with both human capital and financial platforms. Specifically, this includes cloud advisory and deployment, and optimization services for cloud platforms such as Workday, SAP SuccessFactors, Oracle, and Cornerstone OnDemand.