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Equity and Distributions, Summary of Changes in Outstanding Units (Details) - shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Summary of changes in outstanding units [Roll Forward]      
Number of units issued and outstanding, beginning balance (in units) 2,184,869,029 2,161,089,479 2,117,588,414
Common units issued in connection with ATM program (in units)     21,807,726
Common unit repurchases under buyback program (in units) (2,909,128) (1,236,800)  
Common units issued in connection with DRIP and EUPP (in units) 2,897,990 19,861,951 19,046,019
Common units issued in connection with the vesting of phantom unit awards (in units) 3,895,049 3,479,958 2,485,580
Common units issues in connection with the vesting of restricted common unit awards (in units)     0
Forfeiture of restricted common unit awards (in units)     (1,250)
Cancellation of treasury units acquired in connection with the vesting of equity-based awards (in units) (1,174,446) (1,037,522) (1,027,798)
Common units issued in connection with employee compensation (in units) 1,626,041 1,443,586 1,176,103
Common units issued in connection with land acquisition (in units)   1,223,242  
Other (in units) 21,595 45,135 14,685
Number of units issued and outstanding, ending balance (in units) 2,189,226,130 2,184,869,029 2,161,089,479
Common Units (Unrestricted) [Member]      
Summary of changes in outstanding units [Roll Forward]      
Number of units issued and outstanding, beginning balance (in units) 2,184,869,029 2,161,089,479 2,116,906,120
Common units issued in connection with ATM program (in units)     21,807,726
Common unit repurchases under buyback program (in units) (2,909,128) (1,236,800)  
Common units issued in connection with DRIP and EUPP (in units) 2,897,990 19,861,951 19,046,019
Common units issued in connection with the vesting of phantom unit awards (in units) 3,895,049 3,479,958 2,485,580
Common units issues in connection with the vesting of restricted common unit awards (in units)     681,044
Forfeiture of restricted common unit awards (in units)     0
Cancellation of treasury units acquired in connection with the vesting of equity-based awards (in units) (1,174,446) (1,037,522) (1,027,798)
Common units issued in connection with employee compensation (in units) 1,626,041 1,443,586 1,176,103
Common units issued in connection with land acquisition (in units)   1,223,242  
Other (in units) 21,595 45,135 14,685
Number of units issued and outstanding, ending balance (in units) 2,189,226,130 2,184,869,029 2,161,089,479
Restricted Common Units [Member]      
Summary of changes in outstanding units [Roll Forward]      
Number of units issued and outstanding, beginning balance (in units) 0 0 682,294
Common units issued in connection with ATM program (in units)     0
Common unit repurchases under buyback program (in units) 0 0  
Common units issued in connection with DRIP and EUPP (in units) 0 0 0
Common units issued in connection with the vesting of phantom unit awards (in units) 0 0 0
Common units issues in connection with the vesting of restricted common unit awards (in units)     (681,044)
Forfeiture of restricted common unit awards (in units)     (1,250)
Cancellation of treasury units acquired in connection with the vesting of equity-based awards (in units) 0 0 0
Common units issued in connection with employee compensation (in units) 0 0 0
Common units issued in connection with land acquisition (in units)   0  
Other (in units) 0 0 0
Number of units issued and outstanding, ending balance (in units) 0 0 0