Related Party Transactions - Schedule of Accounts Receivable and Accounts Payable (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Unconsolidated affiliates
Related Party Transaction [Line Items]
Accounts receivable	$ 1	$ 4
Accounts payable	15	18
EPCO and its privately held affiliates
Related Party Transaction [Line Items]
Accounts payable	146	180
Related parties
Related Party Transaction [Line Items]
Accounts receivable	1	4
Accounts payable	$ 161	$ 198