Equity and Distributions, Summary of Changes in Outstanding Units (Details)	6 Months Ended
	Jun. 30, 2018 shares
Summary of changes in outstanding units [Roll Forward]
Common units issued in connection with land acquisition (in units)	1,223,242
Common Units [Member]
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)	9,877,090
Common units issued in connection with the vesting of phantom unit awards (in units)	3,285,976
Cancellation of treasury units acquired in connection with the vesting of equity-based awards (in units)	(984,605)
Common units issued in connection with employee compensation (in units)	1,443,586
Common units issued in connection with land acquisition (in units)	1,223,242
Other (in units)	16,360
Ending Balance (in units)	2,175,951,128