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Equity and Distributions, Distributions (Details) (USD $)	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014 Cash Distribution [Member] First Quarter 2014 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] First Quarter 2014 Distribution [Member]	Jun. 30, 2014 Cash Distribution [Member] Second Quarter 2014 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] Second Quarter 2014 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] Third Quarter 2014 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] Third Quarter 2014 Distribution [Member]	Mar. 31, 2013 Cash Distribution [Member] First Quarter 2013 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] First Quarter 2013 Distribution [Member]	Jun. 30, 2013 Cash Distribution [Member] Second Quarter 2013 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] Second Quarter 2013 Distribution [Member]	Sep. 30, 2013 Cash Distribution [Member] Third Quarter 2013 Distribution [Member]	Sep. 30, 2014 Cash Distribution [Member] Third Quarter 2013 Distribution [Member]
Distributions to Partners [Abstract]
Distribution Per Common Unit (in dollars per unit)		$ 0.3550		$ 0.3600		$ 0.3650		$ 0.3350		$ 0.3400		$ 0.3450
Record Date			Apr. 30, 2014		Jul. 31, 2014		Oct. 31, 2014		Apr. 30, 2013		Jul. 31, 2013		Oct. 31, 2013
Payment Date			May 07, 2014		Aug. 07, 2014		Nov. 07, 2014		May 07, 2013		Aug. 07, 2013		Nov. 07, 2013
Number of Designated Units to be excluded from distributions during 2014	45,120,000
Number of Designated Units to be excluded from distributions during 2015	35,380,000

X

- Definition

The number of common units outstanding (the Designated Units) on which a private held affiliate agreed to temporarily waive regular quarterly cash distributions it would otherwise receive, for a five-year period after the merger beginning November 22, 2010.

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Number of Designated Units expected to be excluded from distributions during the second calendar year following the latest calendar year.

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Date of record for distribution of cash or unit to limited partner of limited partnership (LP), in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

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