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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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The cash outflow associated with extending a long-term loan to a related party. Alternate caption: Payments for Advances to Affiliates.

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The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

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Related Party Transactions - Schedule of Related Party Transactions (Details) $ in Millions, $ in Millions	1 Months Ended		12 Months Ended
	Feb. 28, 2025 USD ($)	Jul. 31, 2024 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 CAD ($)
Related Party Transactions
Proceeds from the issuance of related party notes			$ 330	$ 629	$ 0
Proceeds from related party debt			330	$ 629	$ 0
PAGP \| Notes Due In June 2035 at 5.75 Percent \| GP
Related Party Transactions
Related party notes payable - fair value (in millions)			330			$ 473
Related party note payable and receivable interest rate per annum (as a percent)	5.75%
Proceeds from the issuance of related party notes	$ 330	$ 629
PAGP \| Notes Due In June 2035 at 5.75 Percent \| Notes Receivable
Related Party Transactions
Related party notes receivable - fair value (in millions)			$ 330			473
Related party note payable and receivable interest rate per annum (as a percent)			5.75%
PAGP \| Notes Due In September 2034 at 6.50 Percent \| GP
Related Party Transactions
Related party notes payable - fair value (in millions)			$ 629			865
Related party note payable and receivable interest rate per annum (as a percent)		6.50%
Proceeds from related party debt	$ 330	$ 629
PAGP \| Notes Due In September 2034 at 6.50 Percent \| Notes Receivable
Related Party Transactions
Related party notes receivable - fair value (in millions)			$ 629			865
Related party note payable and receivable interest rate per annum (as a percent)			6.50%
PAGP \| Notes Due in April 2027 at 8.25 Percent \| GP
Related Party Transactions
Related party notes payable - fair value (in millions)			$ 370			500
Related party note payable and receivable interest rate per annum (as a percent)			8.25%
PAGP \| Notes Due in April 2027 at 8.25 Percent \| Notes Receivable
Related Party Transactions
Related party notes receivable - fair value (in millions)			$ 370			$ 500
Related party note payable and receivable interest rate per annum (as a percent)			8.25%