Business Segments - Segment Assets (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Segment long-term assets	$ 11,622	$ 11,631
Current assets	2,260	1,749
Total assets	13,882	13,380
Operating Segments | Logistics and Marketing
Segment Reporting, Asset Reconciling Item [Line Items]
Segment long-term assets	3,830	3,887
Operating Segments | Gathering and Processing
Segment Reporting, Asset Reconciling Item [Line Items]
Segment long-term assets	7,570	7,515
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Segment long-term assets	$ 222	$ 229