XML 90 R64.htm IDEA: XBRL DOCUMENT v3.20.4
Incentive Stock Program - Restricted Awards and Units (Details) - Restricted stock awards and restricted stock units - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Units      
Awards and units outstanding (in shares) 14,463,314    
Awards and units granted during period (in shares) 5,809,536    
Awards and units vested during period (in shares) (7,167,631)    
Awards and units forfeited during period (in shares) (612,351)    
Awards and units outstanding (in shares) 12,492,868 14,463,314  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Awards and units outstanding, weighted-average grant-date fair value (in dollars per share) $ 65.51    
Awards and units granted during period, weighted-average grant-date fair value (in dollars per share) 87.83    
Awards and units vested during period, weighted-average grant-date fair value (in dollars per share) 60.67    
Awards and units forfeited during period, weighted-average grant-date fair value (in dollars per share) 75.16    
Awards and units outstanding, weighted-average grant-date fair value (in dollars per share) $ 78.19 $ 65.51  
Fair value of awards and units vested $ 631 $ 588 $ 458