Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Schedule of Share-Based Compensation (Details)

v3.19.1
Share-Based Compensation - Schedule of Share-Based Compensation (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation $ 32 $ 34
Capitalized share-based compensation (4) (6)
Total share-based compensation expense 28 28
Tax benefit associated with share-based compensation expense 1 2
Equity Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation 29 17
Liability Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total share-based compensation $ 3 $ 17