Partners' Capital and Distributions - PAA Distributions (Details) - PAA - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Feb. 14, 2022	Jan. 10, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Partners Capital and Distribution [Line Items]
Percentage of available cash distributed			100.00%
Number of days after end of quarter within which distributions must be paid to unitholders			45 days
Cash Distribution | Series A Preferred Units
Partners Capital and Distribution [Line Items]
Total distribution amount			$ 149	$ 149	$ 149
Cash Distribution | Series B Preferred Units
Partners Capital and Distribution [Line Items]
Total distribution amount			49	49	49
Cash Distribution | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners			$ 517	$ 655	$ 1,004
Distributions per common unit (in dollars per share)			$ 0.72	$ 0.90	$ 1.38
Cash Distribution | Common Units | Subsequent Event
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners	$ 127
Distributions per common unit (in dollars per share)		$ 0.18
Public | Cash Distribution | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners			$ 341	$ 432	$ 632
AAP | Cash Distribution | Common Units
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners			176	$ 223	$ 372
AAP | Fourth quarter distribution | Cash Distribution | Common Units | Subsequent Event
Partners Capital and Distribution [Line Items]
Distributions paid to limited partners	43
Other current liabilities | Series B Preferred Units
Partners Capital and Distribution [Line Items]
Distributions payable			$ 6
Other current liabilities | Cash Distribution | Series A Preferred Units | Subsequent Event
Partners Capital and Distribution [Line Items]
Total distribution amount	$ 37