Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Treasury Stock	Additional Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive Income, Net	Total Alight, Inc. Equity	Noncontrolling Interest
Balance at Dec. 31, 2022	$ 5,089	$ (12)	$ 4,514	$ (158)	$ 95	$ 4,439	$ 650
Net income (loss)	(74)			(68)		(68)	(6)
Other comprehensive income (loss), net	(20)				(14)	(14)	(6)
Conversion of noncontrolling interest	(49)		145			145	(194)
Share-based compensation expense	37		37			37
Shares vested, net of shares withheld in lieu of taxes	(6)		(6)			(6)
Share repurchases	(10)	(10)				(10)
Balance at Mar. 31, 2023	4,967	(22)	4,690	(226)	81	4,523	444
Balance at Dec. 31, 2023	4,742	(52)	4,946	(503)	71	4,462	280
Net income (loss)	(116)			(114)		(114)	(2)
Other comprehensive income (loss), net	1				4	4	(4)
Conversion of noncontrolling interest	(65)		199			199	(264)
Share-based compensation expense	28		28			28
Shares withheld in lieu of taxes	(57)		(57)			(57)
Other	(4)		(3)			(3)	(1)
Balance at Mar. 31, 2024	$ 4,528	$ (52)	$ 5,113	$ (617)	$ 75	$ 4,519	$ 9