Related Party Transactions - Schedule of Accounts Receivable and Accounts Payable (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Related parties
Related Party Transaction [Line Items]
Accounts receivable	$ 2	$ 1
Accounts payable	151	217
Unconsolidated affiliates
Related Party Transaction [Line Items]
Accounts receivable	2	1
Accounts payable	17	22
EPCO and its privately held affiliates
Related Party Transaction [Line Items]
Accounts payable	$ 134	$ 195