Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Share-Based Compensation - Schedule of Share-Based Compensation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total share-based compensation $ 116 $ 140 $ 137
Capitalized share-based compensation (6) (9) (24)
Total share-based compensation expense 110 131 113
Tax benefit associated with share-based compensation expense 23 14 6
Equity Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total share-based compensation 114 131 89
Liability Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total share-based compensation $ 2 $ 9 $ 48