Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Share-Based Compensation - Schedule of Unrecognized Compensation Cost (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
Restricted Stock Share Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost $ 2
Recognized over a weighted average period 4 months
Restricted Share Unit And Performance Stock Unit Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost $ 136
Recognized over a weighted average period 1 year 8 months
Phantom Unit Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation cost $ 11
Recognized over a weighted average period 1 year 5 months