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Capital Accounts, Noncontrolling Interests (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Noncontrolling Interest      
Noncontrolling interests $ 1,109.6 $ 1,073.3  
Net income attributable to noncontrolling interests 117.6 110.1 $ 95.8
Breviloba LLC [Member]      
Noncontrolling Interest      
Noncontrolling Interest, Increase from Sale of Parent Equity Interest     $ 440.7
Noncontrolling interests [1] 461.6 480.4  
Whitehorn Pipeline Company LLC [Member]      
Noncontrolling Interest      
Noncontrolling interests [2] 188.3 193.0  
Enterprise Navigator Ethylene Terminal LLC [Member]      
Noncontrolling Interest      
Noncontrolling interests [3] 141.9 142.2  
Other [Member]      
Noncontrolling Interest      
Noncontrolling interests [4] $ 317.8 $ 257.7  
Altus Midstream Processing LP [Member] | Breviloba LLC [Member]      
Noncontrolling Interest      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 33.00%    
Western Gas Partners, LP [Member] | Whitehorn Pipeline Company LLC [Member]      
Noncontrolling Interest      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 20.00%    
Navigator Ethylene Terminals LLC [Member] | Enterprise Navigator Ethylene Terminal LLC [Member]      
Noncontrolling Interest      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 50.00%    
[1] Altus Midstream Processing LP acquired a noncontrolling 33% equity interest in Breviloba, which owns the Shin Oak NGL Pipeline, in July 2019 for $440.7 million in cash.
[2] An affiliate of Western Gas Partners, LP owns a noncontrolling 20% equity interest in Whitethorn, which owns the majority of our Midland-to-ECHO 1 pipeline.
[3] Navigator Ethylene Terminals LLC owns a noncontrolling 50% equity interest in ENET, which owns our ethylene export terminal located at Morgan’s Point on the Houston Ship Channel.
[4] Primarily represents noncontrolling equity interests in NGL fractionation and pipeline businesses.