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Intangible Assets and Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 5,136.5 |  | $ 5,136.5
Accumulated Amortization | (1,727.1) |  | (1,687.5)
Carrying Value | 3,409.4 |  | 3,449.0
Amortization expense | 39.6 | $ 44.2 |
Forecasted amortization expense [Abstract] |  |  |
Remainder of 2020 | 125.1 |  |
2021 | 167.1 |  |
2022 | 164.1 |  |
2023 | 162.4 |  |
2024 | 158.9 |  |
NGL Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 610.4 |  | 610.4
Accumulated Amortization | (256.7) |  | (250.2)
Carrying Value | 353.7 |  | 360.2
Amortization expense | 6.5 | 9.1 |
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 447.8 |  | 447.8
Accumulated Amortization | (210.0) |  | (206.3)
Carrying Value | 237.8 |  | 241.5
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 162.6 |  | 162.6
Accumulated Amortization | (46.7) |  | (43.9)
Carrying Value | 115.9 |  | 118.7
Crude Oil Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 2,480.4 |  | 2,480.4
Accumulated Amortization | (499.4) |  | (478.5)
Carrying Value | 1,981.0 |  | 2,001.9
Amortization expense | 20.9 | 22.0 |
Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 2,203.5 |  | 2,203.5
Accumulated Amortization | (260.1) |  | (243.5)
Carrying Value | 1,943.4 |  | 1,960.0
Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 276.9 |  | 276.9
Accumulated Amortization | (239.3) |  | (235.0)
Carrying Value | 37.6 |  | 41.9
Natural Gas Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,818.3 |  | 1,818.3
Accumulated Amortization | (887.3) |  | (877.1)
Carrying Value | 931.0 |  | 941.2
Amortization expense | 10.2 | 10.9 |
Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,350.3 |  | 1,350.3
Accumulated Amortization | (489.6) |  | (481.6)
Carrying Value | 860.7 |  | 868.7
Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 468.0 |  | 468.0
Accumulated Amortization | (397.7) |  | (395.5)
Carrying Value | 70.3 |  | 72.5
Petrochemical & Refined Products Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 227.4 |  | 227.4
Accumulated Amortization | (83.7) |  | (81.7)
Carrying Value | 143.7 |  | 145.7
Amortization expense | 2.0 | $ 2.2 |
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 181.4 |  | 181.4
Accumulated Amortization | (59.1) |  | (57.5)
Carrying Value | 122.3 |  | 123.9
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 46.0 |  | 46.0
Accumulated Amortization | (24.6) |  | (24.2)
Carrying Value | $ 21.4 |  | $ 21.8

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