Long-Term Contracted Revenue (Details) $ in Millions	Sep. 30, 2019 USD ($)
Lease Revenue (ASC 842)
2019 remaining	$ 11
2020	46
2021	44
2022	42
2023	42
Thereafter	540
Total lease payment	725
Total Long-Term Revenue
2019 remaining	104
2020	272
2021	156
2022	103
2023	69
Thereafter	129
Total	833
Lease Revenue (ASC 842)
Lease Revenue (ASC 842)
2019 remaining	81
2020	219
2021	123
2022	75
2023	49
Thereafter	111
Total lease payment	658
Contract Revenue (ASC 606)
Contract Revenue (ASC 606)
2019 remaining	23
2020	53
2021	33
2022	28
2023	20
Thereafter	18
Total	$ 175