Debt (Debt Textuals) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Aug. 14, 2020	Apr. 09, 2020	Jun. 30, 2019
Line of Credit Facility [Line Items]
Effective interest rate		5.30%			5.90%
2022 First Lien Notes
Line of Credit Facility [Line Items]
Early Repayment of Senior Debt	[1]	$ 245
2024 First Lien Notes
Line of Credit Facility [Line Items]
Early Repayment of Senior Debt	[2]	$ 184
Subsequent Event | Russell City and Los Esteros Project Debt
Line of Credit Facility [Line Items]
Funds distributed after emergence of PG&E from bankruptcy			$ 88
Other corporate facilities
Line of Credit Facility [Line Items]
Letter of Credit Amount Extended				$ 100

[1] On January 21, 2020, we redeemed the outstanding $245 million in aggregate principal amount of our 2022 First Lien Notes, which was included in debt, current portion on our Consolidated Condensed Balance Sheet at December 31, 2019, with the proceeds from the 2028 First Lien Notes, which was included in cash and cash equivalents on our Consolidated Condensed Balance Sheet at

[2] (2)On January 21, 2020, we redeemed the outstanding $184 million in aggregate principal amount of our 2024 First Lien Notes, which was included in debt, current portion on our Consolidated Condensed Balance Sheet at December 31, 2019, with the proceeds from the 2028 First Lien Notes, which was included in cash and cash equivalents on our Consolidated Condensed Balance Sheet at December 31, 2019.