Equity and Distributions, Distributions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Distributions to Partners [Abstract]
Number of Designated Units excluded from distributions	35,380,000	45,120,000	47,400,000
Cash Distribution [Member] | First Quarter 2014 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)		$ 0.3550
Record Date		Apr. 30, 2014
Payment Date		May 07, 2014
Cash Distribution [Member] | Second Quarter 2014 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)		$ 0.3600
Record Date		Jul. 31, 2014
Payment Date		Aug. 07, 2014
Cash Distribution [Member] | Third Quarter 2014 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)		$ 0.3650
Record Date		Oct. 31, 2014
Payment Date		Nov. 07, 2014
Cash Distribution [Member] | Fourth Quarter 2014 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)		$ 0.3700
Record Date		Jan. 30, 2015
Payment Date		Feb. 06, 2015
Cash Distribution [Member] | First Quarter 2015 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)	$ 0.3750
Record Date	Apr. 30, 2015
Payment Date	May 07, 2015
Cash Distribution [Member] | Second Quarter 2015 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)	$ 0.3800
Record Date	Jul. 31, 2015
Payment Date	Aug. 07, 2015
Cash Distribution [Member] | Third Quarter 2015 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)	$ 0.3850
Record Date	Oct. 30, 2015
Payment Date	Nov. 06, 2015
Cash Distribution [Member] | Fourth Quarter 2015 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)	$ 0.3900
Record Date	Jan. 29, 2016
Payment Date	Feb. 05, 2016