Partners' Capital and Distributions - AAP Distributions (Details) - Cash Distribution - AAP - USD ($) $ in Millions	Aug. 14, 2025	May 15, 2025	Feb. 14, 2025
Partners' Capital and Distributions [Line Items]
Distributions to noncontrolling interests		$ 13	$ 13
Distributions to PAGP		75	75
Cash Distribution		$ 88	$ 88
Forecast
Partners' Capital and Distributions [Line Items]
Distributions to noncontrolling interests	$ 13
Distributions to PAGP	75
Cash Distribution	$ 88

This element represents disclosure of the aggregate cash dividends paid to the entity by consolidated subsidiaries.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Name:	us-gaap_CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration