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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Earnings Per Share [Abstract]    
Net income $ 703 $ 673
Dividend equivalent payments, basic 0 (1)
Dividend equivalent payments, diluted 0 0
Income available to common stockholders, basic 703 672
Income available to common stockholders, diluted $ 703 $ 673
Weighted-average shares outstanding (in shares) 239.3 251.4
Dilutive effect of outstanding options and share-settled awards (in shares) 0.9 1.2
Adjusted weighted-average shares outstanding (in shares) 240.2 252.6
Basic (in dollars per share) $ 2.94 $ 2.67
Diluted (in dollars per share) $ 2.93 $ 2.66