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Share-Based Compensation Plans - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Shares      
Outstanding at beginning of period (in shares) 852 788 723
Granted (in shares) 0 130 156
Exercised (in shares) 0 (38) (90)
Expired or cancelled (in shares) 0 (28) (1)
Outstanding at end of period (in shares) 852 852 788
Exercisable (in shares) 639 510 455
Wtd. Avg. Exercise Price Per Share      
Outstanding at beginning of period (in dollars per share) $ 90 $ 91 $ 87
Granted (in dollars per share)   92 93
Exercised (in dollars per share)   93 59
Expired or cancelled (in dollars per share)   123 54
Outstanding at end of period (in dollars per share) 90 90 91
Exercisable (in dollars per share) $ 90 $ 89 $ 90
Wtd. Avg. Remaining Contractual Term and Aggregate Intrinsic Value      
Outstanding (in years) 5 years 1 month 6 days 6 years 1 month 6 days 6 years 2 months 12 days
Exercisable (in years) 4 years 4 months 24 days 4 years 9 months 18 days 4 years 6 months
Outstanding $ 2 $ 8 $ 4
Exercised     3
Exercisable $ 2 $ 6 $ 3