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Related Party Transactions - Narrative (Details) $ in Millions, $ in Millions	1 Months Ended		6 Months Ended	12 Months Ended			22 Months Ended
	Feb. 28, 2025 USD ($)	Jul. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)	Feb. 28, 2025 CAD ($)	Jul. 31, 2024 CAD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 CAD ($)
Related Party Transactions
Proceeds from the issuance of related party notes				$ 629
Proceeds from related party debt				629
Interest expense, net				430	$ 386	$ 405
GP
Related Party Transactions
Costs reimbursed to general partner				583	546	$ 476
GP | PAGP | 8.25% note due April 2027
Related Party Transactions
Related party note receivable										$ 370	$ 500
Related party notes payable										$ 370	$ 500
Related party note payable and receivable interest rate (as a percent)							8.25%
GP | PAGP | Notes Due In September 2034 At 6.50 Percent
Related Party Transactions
Related party note receivable		$ 629							$ 865
Related party notes payable		629							$ 865
Related party note payable and receivable interest rate (as a percent)			6.50%
Proceeds from the issuance of related party notes		629
Proceeds from related party debt		$ 629
GP | PAGP | Related Party Promissory Notes
Related Party Transactions
Related party note receivable			$ 948	948	379		$ 948
Related party notes payable			948	948	379		948
Related party interest payable			27	27	10		27
Related party interest receivable			$ 27	27	10		$ 27
Related party interest income				48	25
Interest expense, net				$ 48	$ 25
GP | PAGP | Notes Due In June 2035 at 5.75 Percent | Subsequent Event
Related Party Transactions
Related party note receivable	$ 330							$ 473
Related party notes payable	$ 330							$ 473
Related party note payable and receivable interest rate (as a percent)	5.75%
PAGP | Class C Shares
Related Party Transactions
Ownership interest (in units) | shares				542,004,838	539,445,289

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