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Property, Plant and Equipment and Intangible Assets - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 20,185.0 $ 19,876.8  
Accumulated depreciation, amortization and impairment (8,011.4) (5,328.3)  
Property, plant and equipment, net 12,173.6 14,548.5  
Intangible assets 2,643.5 2,643.5  
Accumulated amortization and impairment (1,261.1) (908.5)  
Intangible assets, net $ 1,382.4 1,735.0 $ 1,983.2
Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 10 years    
Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 20 years    
Gathering Systems [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 9,216.1 8,976.8  
Gathering Systems [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 5 years    
Gathering Systems [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 20 years    
Processing and Fractionation Facilities [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 6,276.8 5,143.0  
Processing and Fractionation Facilities [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 5 years    
Processing and Fractionation Facilities [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 25 years    
Terminaling and Storage Facilities [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 1,555.1 1,495.5  
Terminaling and Storage Facilities [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 5 years    
Terminaling and Storage Facilities [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 25 years    
Transportation Assets [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 2,567.7 2,292.4  
Transportation Assets [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 10 years    
Transportation Assets [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 50 years    
Other Property, Plant and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 32.4 184.1  
Other Property, Plant and Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 3 years    
Other Property, Plant and Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful lives 50 years    
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 160.8 159.7  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment 324.3 1,576.5  
Finance Lease Right-of-Use Assets [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment $ 51.8 $ 48.8