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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross $ 55,285.0 $ 50,897.2  
Less accumulated depreciation 13,681.6 12,159.6  
Property, plant and equipment, net 41,603.4 38,737.6 $ 35,620.4
Summary of depreciation expense and capitalized interest [Abstract]      
Depreciation expense [1] 1,562.6 1,436.2 1,296.1
Capitalized interest [2] 143.8 147.9 192.1
Asset Retirement Obligations [Roll Forward]      
ARO liability beginning balance 126.3 86.7 85.4
Liabilities incurred 5.0 24.4 4.7
Liabilities settled (2.3) (2.5) (2.2)
Revisions in estimated cash flows (4.8) 11.5 (6.7)
Accretion expense 7.9 6.2 5.5
ARO liability ending balance 132.1 126.3 $ 86.7
Capitalized costs, asset retirement costs 69.6 72.5  
Forecasted accretion expense [Abstract]      
2020 8.2    
2021 8.6    
2022 9.1    
2023 9.6    
2024 10.3    
Plants, pipelines and facilities [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross [3] $ 47,201.2 42,371.0  
Plants, pipelines and facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [3],[4] 3 years    
Plants, pipelines and facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [3],[4] 45 years    
Underground and other storage facilities [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross [5] $ 3,965.5 3,624.2  
Underground and other storage facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [5],[6] 5 years    
Underground and other storage facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [5],[6] 40 years    
Transportation equipment [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross [7] $ 198.9 187.1  
Transportation equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [7] 3 years    
Transportation equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [7] 10 years    
Marine vessels [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross [8] $ 905.9 828.6  
Marine vessels [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [8] 15 years    
Marine vessels [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life [8] 30 years    
Land [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross $ 372.3 359.5  
Construction in progress [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross $ 2,641.2 $ 3,526.8  
Processing plants [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years    
Processing plants [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Pipelines and related equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Pipelines and related equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 45 years    
Terminal facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 10 years    
Terminal facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Buildings [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years    
Buildings [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 40 years    
Office furniture and equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 3 years    
Office furniture and equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years    
Laboratory and shop equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Laboratory and shop equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Underground storage facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Underground storage facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Storage tanks [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 10 years    
Storage tanks [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 40 years    
Water wells [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Water wells [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
[1] Depreciation expense is a component of “Costs and expenses” as presented on our Statements of Consolidated Operations.
[2] Capitalized interest is a component of “Interest expense” as presented on our Statements of Consolidated Operations.
[3] Plants, pipelines and facilities include processing plants; NGL, natural gas, crude oil and petrochemical and refined products pipelines; terminal loading and unloading facilities; buildings; office furniture and equipment; laboratory and shop equipment and related assets. We placed a number of major growth projects into service during 2019 including the Shin Oak NGL pipeline, Midland-to-ECHO 2 pipeline, an isobutane dehydrogenation facility, the Mentone and Bulldog natural gas processing plants, and LPG-related expansion projects at our Enterprise Hydrocarbons Terminal.
[4] In general, the estimated useful lives of major assets within this category are: processing plants, 20-35 years; pipelines and related equipment, 5-45 years; terminal facilities, 10-35 years; buildings, 20-40 years; office furniture and equipment, 3-20 years; and laboratory and shop equipment, 5-35 years.
[5] Underground and other storage facilities include underground product storage caverns; above ground storage tanks; water wells and related assets.
[6] In general, the estimated useful lives of assets within this category are: underground storage facilities, 5-35 years; storage tanks, 10-40 years; and water wells, 5-35 years.
[7] Transportation equipment includes tractor-trailer tank trucks and other vehicles and similar assets used in our operations.Marine vessels include tow boats, barges and related equipment used in our marine transportation business.
[8] Marine vessels include tow boats, barges and related equipment used in our marine transportation business.