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Share-Based Compensation Plans - Summary of Restricted Stock Activity (Details) - Restricted Stock - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Shares        
Unvested at beginning of period (in shares) 628 588 545  
Granted (in shares) 343 261 245  
Vested (in shares) (180) (177) (177)  
Forfeited (in shares) (38) (44) (25)  
Unvested at end of period (in shares) 753 628 588 545
Wtd. Avg. Price Per Share        
Unvested at beginning of period (in dollars per share) $ 91 $ 94 $ 85  
Granted (in dollars per share) 64 82 104  
Vested (in dollars per share) 86 87 80  
Forfeited (in dollars per share) 83 90 88  
Unvested at end of period (in dollars per share) $ 80 $ 91 $ 94 $ 85
Equity Other Than Options, Additional [Abstract]        
Unvested (in years) 1 year 4 months 24 days 1 year 4 months 24 days 1 year 4 months 24 days 1 year 3 months 18 days
Unvested, aggregate intrinsic value $ 43