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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 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Net Income (Loss) $ 234 $ 176 $ 783 $ 602
Net income attributable to unvested awarded performance stock (3) (3) (9) (9)
Net income attributable to common shares $ 231 $ 173 $ 774 $ 593
Weighted average number of common shares outstanding – basic 286 284 285 284
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (4) (4) (4) (4)
Weighted average number of common shares outstanding for basic net income per common share 282 280 281 280
Dilutive effect of potentially issuable common shares 2 1 2 1
Weighted average number of shares outstanding – diluted 284 281 283 281
Basic (in dollars per share) $ 0.82 $ 0.62 $ 2.75 $ 2.12
Diluted (in dollars per share) $ 0.81 $ 0.62 $ 2.73 $ 2.11