Partners' Capital and Distributions - Distributions, Class A (Details) - Class A Shares - USD ($) $ / shares in Units, $ in Millions	Nov. 14, 2016	Oct. 31, 2016	Aug. 12, 2016	May 13, 2016	Feb. 12, 2016
Second Quarter Distribution
Distributions
Distribution Date			Aug. 12, 2016
Distributions to Class A Shareholders			$ 62
Distribution per Class A share, paid (usd per share)			$ 0.231
First Quarter Distribution
Distributions
Distribution Date				May 13, 2016
Distributions to Class A Shareholders				$ 62
Distribution per Class A share, paid (usd per share)				$ 0.231
Fourth Quarter Distribution
Distributions
Distribution Date					Feb. 12, 2016
Distributions to Class A Shareholders					$ 55
Distribution per Class A share, paid (usd per share)					$ 0.231
Forecast | Third Quarter Distribution
Distributions
Distribution Date	Nov. 14, 2016
Distributions to Class A Shareholders	$ 55
Distribution per Class A share, paid (usd per share)	$ 0.2065
Subsequent Event | Third Quarter Distribution
Distributions
Shareholders or unitholders of record, date		Oct. 31, 2016