Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Additional Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive Loss	Total Alight, Inc. Equity	Noncontrolling Interest
Balance at Dec. 31, 2020	$ 683
Net loss	(25)
Other comprehensive loss, net	31
Balance at Jun. 30, 2021	4,786	$ 4,009	$ (61)		$ 3,948	$ 838
Net loss	(120)		(107)		(107)	(13)
Other comprehensive loss, net	(3)			$ (3)	(3)
Share-based compensation expense	15	15			15
Balance at Sep. 30, 2021	$ 4,678	$ 4,024	$ (168)	$ (3)	$ 3,853	$ 825