XML 13 R3.htm IDEA: XBRL DOCUMENT
v3.23.2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Class A Shares |  |  |  |  |  |
Shares outstanding |  |  |  |  |  |
Shares outstanding (shares) | 195,961,642 | 194,407,642 | 194,407,642 | 194,228,477 | 194,228,477 | 194,192,777

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LimitedPartnersCapitalAccountLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of limited partner units outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_LimitedPartnersCapitalAccountByClassAxis=pagp_SharesClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |