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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Numerator        
Net Income (Loss) From Continuing Operations $ (10) $ (1,073) $ (29) $ (1,090)
Less: Net income (loss) attributable to noncontrolling interest 0 1 0 1
Net Income (loss) from continuing operations attributable to Alight, Inc. (10) (1,072) (29) (1,089)
Net Income (Loss) From Discontinued Operations, Net of Tax 0 (1) 0 (9)
Net Income (Loss) Attributable to Alight, Inc. (10) (1,073) (29) (1,098)
Loss impact of conversion of noncontrolling interest 0 0 0 0
Net income (loss) attributable to Alight, Inc. - diluted $ (10) $ (1,073) $ (29) $ (1,098)
Denominator        
Weighted-average shares outstanding - basic (in shares) 26,351,020 26,423,496 26,294,427 26,518,940
Dilutive effect of the exchange of noncontrolling interest units (in shares) 0 0 0 0
Dilutive effect of RSUs (in shares) 0 0 0 0
Weighted-average shares outstanding - diluted (in shares) 26,351,020 26,423,496 26,294,427 26,518,940
Basic and Diluted (net loss) earnings per share        
Continuing operations, basic (in dollars per share) $ (0.38) $ (40.57) $ (1.10) $ (41.06)
Continuing operations, diluted (in dollars per share) (0.38) (40.57) (1.10) (41.06)
Discontinued operations, basic (in dollars per share) 0 (0.04) 0 (0.34)
Discontinued operations, diluted (in dollars per share) 0 (0.04) 0 (0.34)
Net income (loss), basic (in dollars per share) (0.38) (40.61) (1.10) (41.40)
Net income (loss), diluted (in dollars per share) $ (0.38) $ (40.61) $ (1.10) $ (41.40)