Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 01, 2021	Apr. 30, 2021
Property Plant And Equipment [Line Items]
Depreciation, amortization and accretion	$ 50	$ 50	$ 49
Payments to acquire productive assets	$ 11	27	38
Impairment of fixed assets		$ 0	$ 0
Zydeco Pipeline Company LLC (“Zydeco”)
Property Plant And Equipment [Line Items]
Ownership	100.00%
Zydeco Pipeline Company LLC (“Zydeco”) | Zydeco Pipeline Company LLC (“Zydeco”)
Property Plant And Equipment [Line Items]
Ownership					92.50%
Zydeco Pipeline Company LLC (“Zydeco”) | Zydeco Pipeline Company LLC (“Zydeco”) | Shell Pipeline Company L P
Property Plant And Equipment [Line Items]
Ownership percentage transferred				7.50%