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Equity - Summary of Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dividends declared per share (usd per share) $ 0.28 $ 0.28 $ 0.26 $ 0.26    
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 2,946 $ 2,976 $ 2,821 $ 2,967 $ 2,976 $ 2,967
Other   1        
Net income 113 87 31 38 200 69
Other comprehensive income (loss), net 28 (13) 52 (87)    
Dividends declared (51) (50) (47) (48)    
Stock incentive plan activity 13 5 8 3    
Repurchase of common stock   (60)   (50)    
Ending balance 3,049 2,946 2,865 2,821 3,049 2,865
Cumulative Effect, Period of Adoption, Adjustment            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance       (2)   (2)
Common Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 2 2 2 2 2 2
Ending balance 2 2 2 2 2 2
Capital in Excess of Par Value            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 2,049 2,037 2,004 1,991 2,037 1,991
Stock incentive plan activity 14 12 8 13    
Ending balance 2,063 2,049 2,012 2,004 2,063 2,012
Retained Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 1,967 1,930 1,854 1,866 1,930 1,866
Net income 113 87 31 38    
Dividends declared (51) (50) (47) (48)    
Ending balance 2,029 1,967 1,838 1,854 2,029 1,838
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance       (2)   (2)
Accumulated Other Comprehensive Loss            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (426) (413) (461) (375) (413) (375)
Other comprehensive income (loss), net 28 (13) 52 (86)    
Ending balance (398) (426) (409) (461) (398) (409)
Treasury Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (655) (588) (587) (527) (588) (527)
Stock incentive plan activity   (7)   (10)    
Repurchase of common stock   (60)   (50)    
Ending balance (656) (655) (587) (587) (656) (587)
Non-Controlling Interest            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 9 8 9 10 8 10
Other   1        
Other comprehensive income (loss), net   0   (1)    
Ending balance $ 9 $ 9 $ 9 $ 9 $ 9 $ 9