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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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings Per Share [Abstract]        
Net Income (Loss) $ 231 $ 257 $ 563 $ 550
Net income attributable to unvested awarded performance stock (3) (3) (6) (6)
Net income attributable to common shares $ 228 $ 254 $ 557 $ 544
Weighted average number of common shares outstanding – basic 295 285 291 285
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (3) (3) (4) (4)
Weighted average number of common shares outstanding for basic net income per common share 292 282 287 281
Dilutive effect of potentially issuable common shares 1 1 2 2
Weighted average number of shares outstanding – diluted 293 283 289 283
Basic (in dollars per share) $ 0.79 $ 0.9 $ 1.94 $ 1.93
Diluted (in dollars per share) $ 0.78 $ 0.9 $ 1.93 $ 1.92