Basis of Presentation and Nature of Business	3 Months Ended
Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Nature of Business	1. Basis of Presentation and Nature of Business Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and should be read in conjunction with the Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, filed with the Securities and Exchange Commission (“SEC”) on February 29, 2024. 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. 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 March 31, 2024, Alight owned approximately 99% of the economic interest in the Predecessor and had 100% of the voting power and controlled the management of the Predecessor. The non-voting ownership percentage held by noncontrolling interest was less than 1% as of March 31, 2024. On March 20, 2024, Alight, Inc. entered into a definitive agreement (the “Disposition Agreement”) to sell its Professional Services segment and its Payroll & HCM Outsourcing businesses within the Employer Solutions segment (“Payroll and Professional Services business”) for a purchase price of up to approximately $1.2 billion, in the form of $1 billion in cash and up to $200 million in seller notes, of which $150 million is contingent upon the Payroll & Professional Services business 2025 financial performance, subject to certain adjustments (the “Disposition”). As a result of this agreement, the results of the Company’s Payroll and Professional Services businesses are reported separately as discontinued operations, net of tax, in our condensed consolidated statements of comprehensive income (loss) for all periods presented and its assets and liabilities are presented in our condensed consolidated balance sheets as assets and liabilities held for sale. The transaction is expected to close by mid-year 2024, subject to customary closing conditions, including regulatory approvals. The Company's cash flows are presented inclusive of discontinued operations on the condensed consolidated statement of cash flows for all periods presented. The significant operating and investing non-cash components included in our condensed consolidated statement of cash flows for discontinued operations are included in Note 4. 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 primary business, Employer Solutions, is driven by our Alight Worklife platform, and includes total employee wellbeing, integrated benefits administration, healthcare navigation, financial wellbeing, leaves solutions, and retiree healthcare. 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.

Basis of Presentation and Nature of Business

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Nature of Business

1. Basis of Presentation and Nature of Business

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and should be read in conjunction with the Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, filed with the Securities and Exchange Commission (“SEC”) on February 29, 2024. 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.

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 March 31, 2024, Alight owned approximately 99% of the economic interest in the Predecessor and had 100% of the voting power and controlled the management of the Predecessor. The non-voting ownership percentage held by noncontrolling interest was less than 1% as of March 31, 2024.

On March 20, 2024, Alight, Inc. entered into a definitive agreement (the “Disposition Agreement”) to sell its Professional Services segment and its Payroll & HCM Outsourcing businesses within the Employer Solutions segment (“Payroll and Professional Services business”) for a purchase price of up to approximately $1.2 billion, in the form of $1 billion in cash and up to $200 million in seller notes, of which $150 million is contingent upon the Payroll & Professional Services business 2025 financial performance, subject to certain adjustments (the “Disposition”). As a result of this agreement, the results of the Company’s Payroll and Professional Services businesses are reported separately as discontinued operations, net of tax, in our condensed consolidated statements of comprehensive income (loss) for all periods presented and its assets and liabilities are presented in our condensed consolidated balance sheets as assets and liabilities held for sale. The transaction is expected to close by mid-year 2024, subject to customary closing conditions, including regulatory approvals.

The Company's cash flows are presented inclusive of discontinued operations on the condensed consolidated statement of cash flows for all periods presented. The significant operating and investing non-cash components included in our condensed consolidated statement of cash flows for discontinued operations are included in Note 4.

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 primary business, Employer Solutions, is driven by our Alight Worklife platform, and includes total employee wellbeing, integrated benefits administration, healthcare navigation, financial wellbeing, leaves solutions, and retiree healthcare. 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.