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Long-Term Debt and Note Payable - Affiliate - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Long-term debt
Unamortized premiums, net	$ 4	$ 0
Unamortized debt issuance costs	(114)	(115)
Total long-term debt	4,854	5,951
Less current maturities	(3)	(1,105)
Long-term debt, excluding current maturities	4,851	4,846
Note payable - affiliate	1,100	1,069
Senior notes
Long-term debt
Long-term debt, gross	$ 4,856	5,956
Senior notes | Minimum
Long-term debt
Stated interest rate	6.125%
Senior notes | Maximum
Long-term debt
Stated interest rate	7.75%
Term loan
Long-term debt
Long-term debt, gross	$ 100	$ 100
Weighted average interest rate	2.99%	3.80%
Term loan | London Interbank Offered Rate (LIBOR)
Long-term debt
Basis spread on variable rate	2.00%
Finance lease and other obligation
Long-term debt
Long-term debt, gross	$ 8	$ 10
Note payable - affiliate | Affiliated entity
Long-term debt
Stated interest rate	5.561%
Note payable - affiliate	$ 1,100	$ 1,069

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Amount of short-term and long-term debt and lease obligation.

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