Accrued Liabilities - Third Parties - Schedule of Accrued Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Project accruals	$ 6	$ 5
Property taxes	13	4
Other accrued liabilities	2	3
Accrued liabilities – third parties	$ 21	$ 12

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant