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Income/(loss) Per Share - Reconciliation of Basic and Diluted EPS (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Basic income/(loss) per share:    
Net income/(loss) $ 1,736 $ (82)
Weighted average number of common shares outstanding — basic (in shares) 242,000 245,000
Income per weighted average common share — basic (in usd per share) $ 7.17 $ (0.33)
Diluted income/(loss) per share:    
Net income/(loss) $ 1,736 $ (82)
Weighted average number of common shares outstanding — basic (in shares) 242,000 245,000
Weighted average number of common shares outstanding- dilutive (in shares) 242,000 245,000
Income per weighted average common share — diluted (in usd per share) $ 7.17 $ (0.33)
Antidilutive securities (in shares) 1,000 1,000