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Property, Plant and Equipment and Intangible Assets - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 20,313.1 $ 20,185.0
Accumulated depreciation, amortization and impairment (8,316.5) (8,011.4)
Property, plant and equipment, net 11,996.6 12,173.6
Intangible assets 2,643.5 2,643.5
Accumulated amortization and impairment (1,326.6) (1,261.1)
Intangible assets, net $ 1,316.9 1,382.4
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 $ 9,205.4 9,216.1
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 $ 6,275.4 6,276.8
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 $ 1,313.0 1,555.1
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 $ 2,616.0 2,567.7
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 $ 331.0 32.4
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 $ 160.8 160.8
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 358.6 324.3
Finance Lease Right-of-Use Assets [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 52.9 $ 51.8