Equity and Distributions, Summary of Changes in Outstanding Units (Details) - Common Units [Member]	3 Months Ended
	Mar. 31, 2018 shares
Summary of changes in outstanding units [Roll Forward]
Beginning Balance (in units)	2,161,089,479
Common units issued in connection with DRIP and EUPP (in units)	6,642,286
Common units issued in connection with the vesting of phantom unit awards (in units)	3,170,861
Cancellation of treasury units acquired in connection with the vesting of equity-based awards (in units)	(949,778)
Common units issued in connection with employee compensation (in units)	1,443,586
Other (in units)	16,360
Ending Balance (in units)	2,171,412,794