Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Investment in partnerships	$ 729	$ 917
Net operating losses	633	527
Derivative instruments	39	45
Lease liabilities	48	39
Other	17	16
Total deferred tax assets	1,466	1,544
Deferred tax liabilities:
Property and equipment in excess of tax values	(531)	(475)
Lease assets	(47)	(38)
Other	(3)	(3)
Total deferred tax liabilities	(581)	(516)
Net deferred tax assets	885	1,028
Deferred tax asset	1,362	1,444
Other long-term assets, net
Deferred tax liabilities:
Deferred tax asset	1,362	1,444
Other long-term liabilities and deferred credits
Deferred tax liabilities:
Net deferred tax liabilities	$ (477)	$ (416)