v3.26.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Basic Earnings Per Share (EPS):    
Net income (loss) attributable to AGL $ 88 $ 176
Less: Distributed and undistributed income (loss) available to nonvested shareholders 1 1
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 87 $ 175
Basic shares (in shares) 44.9 50.0
Basic EPS (in dollars per share) $ 1.94 $ 3.49
Diluted EPS:    
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 87 $ 175
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries 0 0
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted $ 87 $ 175
Basic shares (in shares) 44.9 50.0
Dilutive securities:    
Restricted stock awards (in shares) 0.5 0.7
Diluted shares (in shares) 45.4 50.7
Diluted EPS (in dollars per share) $ 1.91 $ 3.44
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect (in shares) 0.2 0.1