Partners' Capital and Distributions - PAA Common Unit Distributions (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	May 15, 2025	Feb. 14, 2025	Mar. 31, 2025	Mar. 31, 2024
Partners' Capital and Distributions [Line Items]
Total distributions paid			$ 456	$ 386
Cash Distribution \| Common Units \| PAA
Partners' Capital and Distributions [Line Items]
Total distributions paid		$ 267
Distributions per common unit, paid (usd per unit)		$ 0.38
Forecast \| Cash Distribution \| Common Units \| PAA
Partners' Capital and Distributions [Line Items]
Total distributions paid	$ 267
Distributions per common unit, paid (usd per unit)	$ 0.38
Public \| Cash Distribution \| Common Units \| PAA
Partners' Capital and Distributions [Line Items]
Total distributions paid		$ 179
Public \| Forecast \| Cash Distribution \| Common Units \| PAA
Partners' Capital and Distributions [Line Items]
Total distributions paid	$ 179
AAP \| Cash Distribution \| Common Units \| PAA
Partners' Capital and Distributions [Line Items]
Total distributions paid		$ 88
AAP \| Forecast \| Cash Distribution \| Common Units \| PAA
Partners' Capital and Distributions [Line Items]
Total distributions paid	$ 88