Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Treasury Stock Common	Additional Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Total Alight, Inc. Equity	Noncontrolling Interest
Balance at Dec. 31, 2021	$ 4,928		$ 4,228	$ (96)	$ 8	$ 4,140	$ 788
Net income (loss)	(72)			(62)		(62)	(10)
Other comprehensive income, net	100				87	87	13
Conversion of noncontrolling interest	(28)		113			113	(141)
Share-based compensation expense	181		181			181
Shares vested, net of shares withheld in lieu of taxes	(8)		(8)			(8)
Share repurchases	(12)	$ (12)				(12)
Balance at Dec. 31, 2022	5,089	(12)	4,514	(158)	95	4,439	650
Net income (loss)	(362)			(345)		(345)	(17)
Other comprehensive income, net	(33)				(24)	(24)	(9)
Common stock issued under ESPP	10		10			10
Conversion of noncontrolling interest	(66)		278			278	(344)
Share-based compensation expense	160		160			160
Shares vested, net of shares withheld in lieu of taxes	(16)		(16)			(16)
Share repurchases	(40)	(40)				(40)
Balance at Dec. 31, 2023	$ 4,742	$ (52)	$ 4,946	$ (503)	$ 71	$ 4,462	$ 280