Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Summary of Basic and Diluted (Net Loss) Earnings Per Share

Basic and diluted (net loss) earnings per share are as follows (in millions, except for share and per share amounts):

	Year Ended			Six Months Ended
	December 31,			December 31,
	2022			2021
Basic and diluted (net loss) earnings per share:
Numerator
Net (loss) income attributable to Alight, Inc. - basic and diluted	$	(62	)	$	(35	)
Denominator
Weighted-average shares outstanding - basic and diluted		458,558,192			439,800,624
Basic and diluted (net loss) earnings per share	$	(0.14	)	$	(0.08	)