Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transactions
Interest expense, net	$ 554	$ 430	$ 386
GP
Related Party Transactions
Costs reimbursed to general partner	570	583	546
GP \| PAGP \| Related Party Promissory Notes
Related Party Transactions
Related party interest payable	30	27
Related party interest receivable	30	27
Interest expense, net	87	48	25
Related party interest income	$ 87	$ 48	$ 25
PAGP \| Class C Shares
Related Party Transactions
Ownership interest (in units)	530,932,175	542,004,838

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