XML 80 R68.htm IDEA: XBRL DOCUMENT v3.20.4
Stock-Based Compensation (Narrative) (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
May 11, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Repurchase and retirement of common stock $ 326 $ 0 $ 78 $ 305 $ 306 $ 305        
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 $ 95           $ 95      
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 $ 3           $ 3      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage             88.00%      
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 $ 645           $ 645      
Weighted-average service period             1 year 9 months 18 days      
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 $ 547           $ 547      
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 0.0     3.1     0.7 9.6    
Repurchase and retirement of common stock $ 0     $ 305     $ 78 $ 916    
Stock-based compensation expense [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Deferred Income Tax Expense (Benefit) $ 8     $ 6       $ 46 $ 17  
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%