v3.26.1
Earnings Per Share - Summary of Basic and Diluted (Net Loss) Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Numerator    
Net Income (Loss) From Continuing Operations $ (19) $ (17)
Less: Net income (loss) attributable to noncontrolling interest 0 0
Net Income (loss) from continuing operations attributable to Alight, Inc. (19) (17)
Net Income (Loss) From Discontinued Operations, Net of Tax 0 (8)
Net Income (Loss) Attributable to Alight, Inc. (19) (25)
Loss impact of conversion of noncontrolling interest 0 0
Net income (loss) attributable to Alight, Inc. - diluted $ (19) $ (25)
Denominator    
Weighted-average shares outstanding - basic (in shares) 524,744,108 532,297,681
Dilutive effect of the exchange of noncontrolling interest units (in shares) 0 0
Dilutive effect of RSUs (in shares) 0 0
Weighted-average shares outstanding - diluted (in shares) 524,744,108 532,297,681
Basic and Diluted (net loss) earnings per share    
Continuing operations, basic (in dollars per share) $ (0.04) $ (0.03)
Continuing operations, diluted (in dollars per share) (0.04) (0.03)
Discontinued operations, basic (in dollars per share) 0 (0.02)
Discontinued operations, diluted (in dollars per share) 0 (0.02)
Net income (loss), basic (in dollars per share) (0.04) (0.05)
Net income (loss), diluted (in dollars per share) $ (0.04) $ (0.05)