XML 35 R70.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock-Based Compensation (Narrative) (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
May 11, 2018
May 08, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock Repurchased and Retired During Period, Shares               0.6    
Repurchase and retirement of common stock $ 305 $ 306 $ 305 $ 292 $ 299 $ 300   $ 76    
Market-Based Restricted Stock Units [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Unrecognized compensation cost related to stock options and restricted stock rights $ 88           $ 88      
Market-Based Restricted Stock Units [Member] | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage range of shares received at vesting based on total stockholder return ("TSR") 0.00%           0.00%      
Market-Based Restricted Stock Units [Member] | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage range of shares received at vesting based on total stockholder return ("TSR") 200.00%           200.00%      
Performance Based Restricted Stock Units [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Unrecognized compensation cost related to stock options and restricted stock rights $ 8           $ 8      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage             68.00%      
Performance Based Restricted Stock Units [Member] | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage range of shares received at vesting based on total stockholder return ("TSR") 0.00%           0.00%      
Performance Based Restricted Stock Units [Member] | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage range of shares received at vesting based on total stockholder return ("TSR") 200.00%           200.00%      
Restricted Stock Rights [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Unrecognized compensation cost related to stock options and restricted stock rights $ 610           $ 610      
Weighted-average service period             2 years      
Restricted Stock Units (RSUs) [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Unrecognized compensation cost related to stock options and restricted stock rights $ 514           $ 514      
May 2017 Repurchase Program [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Amount of common stock authorized for repurchase                   $ 1,200
Stock Repurchased and Retired During Period, Shares 0.0     0.0     0.0      
Repurchase and retirement of common stock $ 0     $ 0     $ 0      
May 2018 Repurchase Program [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Amount of common stock authorized for repurchase                 $ 2,400  
Stock Repurchased and Retired During Period, Shares 3.1     3.2     9.6 7.2    
Repurchase and retirement of common stock $ 305     $ 292     $ 916 $ 815    
Stock-based compensation expense [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Deferred Income Tax Expense (Benefit) $ 6     $ 14     $ 17 $ 31    
Free cash flow [Member] | Performance Based Restricted Stock Units [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share Based Compensation Arrangement Performance-based Milestone Percentage 50.00%           50.00%