XML 35 R35.htm IDEA: XBRL DOCUMENT v3.19.3
Stock-Based Compensation - Schedule of RSU Activity (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Related tax benefit realized $ 1 $ 7 $ 16 $ 14
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share units earned (in shares) 142 0 166,197 160,200
Shares issued net of withholding taxes (in shares) 102 0 119,346 99,968
Related tax benefit realized $ 0 $ 0 $ 2 $ 3