Equity Method Investments - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Distribution from equity method investment	$ 123,000,000	$ 135,000,000
Unamortized basis differences included in equity investments	82,000,000		$ 84,000,000
Amortization expense (income)	2,000,000	2,000,000
Equity method investments	1,007,000,000		1,013,000,000
Poseidon
Schedule of Equity Method Investments [Line Items]
Equity method investments	0		0	$ 0
Investment, excess distribution	14,000,000	$ 9,000,000
Crestwood Permian Basin LLC (“Permian Basin”)
Schedule of Equity Method Investments [Line Items]
Equity method investments	82,000,000		$ 83,000,000
Capital contribution	$ 2,000,000