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Equity and Distributions, Distributions (Details) - $ / shares
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Distributions to Partners [Abstract]    
Number of Designated Units to be excluded from distributions during 2015 (in units) 35,380,000  
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] | 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