Partners' Capital and Distributions - AAP Distributions (Details) - Cash Distribution - USD ($) $ in Millions		12 Months Ended
	Feb. 14, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AAP
Partners Capital and Distribution [Line Items]
Distributions to noncontrolling interests		$ 39	$ 36	$ 57
Distributions paid to limited partners		201	176	223
PAA | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners		584	517	655
PAA | AAP | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners		$ 201	$ 176	$ 223
PAA | Subsequent Event | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners	$ 187
Fourth quarter distribution | AAP | Subsequent Event
Partners Capital and Distribution [Line Items]
Distributions to noncontrolling interests	13
Fourth quarter distribution | PAA | Subsequent Event | AAP | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners	$ 65