Partners' Capital and Distributions - Distributions, Class A (Details) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Feb. 14, 2017	Jan. 09, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Class A Shares
Partners Capital and Distributions
Distributions paid to limited partners			$ 234	$ 195	$ 91
Distributions
Percentage of available cash distributed			100.00%
Number of days after end of quarter within which distributions must be paid to shareholders			55 days
Distribution per Class A share (in dollars per share)			$ 2.40	$ 2.35	$ 1.78
Class A Shares | Subsequent Event | Fourth quarter distribution
Distributions
Distribution declared, date		Jan. 09, 2017
Distributions per Class A share declared (in dollars per share)		$ 0.55
Distribution paid, date	Feb. 14, 2017
Shareholders or unitholders of record, date	Jan. 31, 2017
AAP
Partners Capital and Distributions
Distributions paid to limited partners			$ 587	$ 576	$ 459
AAP | Subsequent Event | Fourth quarter distribution
Partners Capital and Distributions
Distributions paid to limited partners	$ 134
Distributions
Distribution paid, date	Feb. 14, 2017