Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plans - Narrative (Details)

v3.19.3.a.u2
Stock Incentive Plans - Narrative (Details) - USD ($)
shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Available for future awards (in shares) 8,000    
Accelerated vesting period 1 year    
Allocated share-based compensation expense $ 177 $ 145 $ 135
Income tax benefit recognized 22 34 50
Fair value of restricted stock and restricted stock units 202 $ 209 $ 174
Unrecognized compensation cost related to non-vested share $ 266    
Weighted-average period 2 years 4 months 24 days    
Employee stock purchase plan issued (in shares) 416 256 258
Stock Options | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options, restricted stock and restricted stock unit awards vesting period, years 3 years    
Stock Options | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options, restricted stock and restricted stock unit awards vesting period, years 5 years    
Restricted Stock Units Awards | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options, restricted stock and restricted stock unit awards vesting period, years 1 year    
Restricted Stock Units Awards | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options, restricted stock and restricted stock unit awards vesting period, years 3 years