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Net Income Per Share - Reconciliation between Basic and Diluted Weighted Average Shares Outstanding (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share [Abstract]    
Net Income (Loss) $ 331 $ 293
Net income attributable to unvested awarded performance stock (4) (4)
Net income attributable to common shares $ 327 $ 289
Weighted average number of common shares outstanding – basic 286 285
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (3) (4)
Weighted average number of common shares outstanding for basic net income per common share 283 281
Dilutive effect of potentially issuable common shares 2 2
Weighted average number of shares outstanding – diluted 285 283
Basic (in dollars per share) $ 1.16 $ 1.03
Diluted (in dollars per share) $ 1.15 $ 1.02