Equity and Distributions, Summary of Changes in Outstanding Units (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019
Summary of changes in outstanding units [Roll Forward]
Beginning Balance (in units)	2,188,560,672	2,184,869,029	2,184,869,029
Common unit repurchases under 2019 Buyback Program (in units)	(1,056,736)	(1,852,392)	(2,909,128)
Common units issued in connection with DRIP and EUPP (in units)	1,381,211	1,516,779
Common units issued in connection with employee compensation (in units)		1,626,041
Common units issued in connection with the vesting of phantom unit awards, net (in units)	120,831	2,379,620
Other (in units)		21,595
Ending Balance (in units)	2,189,005,978	2,188,560,672	2,189,005,978