Acquisitions, Divestitures and Other Transactions - Modified Sharing Arrangement (Details) - Plains Oryx Permian Basin LLC (Permian JV) - Modified Sharing Arrangement	12 Months Ended
	Dec. 31, 2021
Oryx Midstream Holdings LLC
Business Acquisition [Line Items]
Distribution Percentage After Termination of Modified Sharing Arrangement	0.65
Oryx Midstream Holdings LLC | Maximum
Business Acquisition [Line Items]
Modified Sharing Arrangement, Term	10 years
PAA | Modified Sharing Arrangement, Annual Available Cash, Up to $300 Million
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	50.00%
PAA | Modified Sharing Arrangement, Annual Available Cash, Between $300 Million to $428 Million
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	100.00%
PAA | Modified Revenue Arrangement, Annual Available Cash, Between $428 Million to $815 Million
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	65.00%
PAA | Modified Sharing Arrangement, Annual Available Cash, $815 Million and Above
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	70.00%
Oryx Midstream Holdings LLC | Modified Sharing Arrangement, Annual Available Cash, Up to $300 Million
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	50.00%
Oryx Midstream Holdings LLC | Modified Sharing Arrangement, Annual Available Cash, Between $300 Million to $428 Million
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	0.00%
Oryx Midstream Holdings LLC | Modified Revenue Arrangement, Annual Available Cash, Between $428 Million to $815 Million
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	35.00%
Oryx Midstream Holdings LLC | Modified Sharing Arrangement, Annual Available Cash, $815 Million and Above
Business Acquisition [Line Items]
Modified Sharing Arrangement, Distribution Percentage	30.00%
Oryx Midstream Holdings LLC | Oryx Midstream Holdings LLC
Business Acquisition [Line Items]
Distribution Percentage After Termination of Modified Sharing Arrangement	0.35