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Intangible Assets and Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 4,896.2 |  | $ 5,135.8
Accumulated Amortization | (1,636.4) |  | (1,826.7)
Carrying Value | 3,259.8 |  | 3,309.1
Amortization expense | 36.1 | $ 39.6 |
Forecasted amortization expense [Abstract] |  |  |
Remainder of 2021 | 107.9 |  |
2022 | 159.5 |  |
2023 | 167.4 |  |
2024 | 163.6 |  |
2025 | 162.2 |  |
Impairment of intangible assets | 6.8 |  |
NGL Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 610.4 |  | 610.4
Accumulated Amortization | (282.3) |  | (276.3)
Carrying Value | 328.1 |  | 334.1
Amortization expense | 6.0 | 6.5 |
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 447.8 |  | 447.8
Accumulated Amortization | (224.5) |  | (221.3)
Carrying Value | 223.3 |  | 226.5
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 162.6 |  | 162.6
Accumulated Amortization | (57.8) |  | (55.0)
Carrying Value | 104.8 |  | 107.6
Crude Oil Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 2,478.1 |  | 2,478.1
Accumulated Amortization | (559.3) |  | (541.5)
Carrying Value | 1,918.8 |  | 1,936.6
Amortization expense | 17.8 | 20.9 |
Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 2,195.0 |  | 2,195.0
Accumulated Amortization | (306.1) |  | (291.6)
Carrying Value | 1,888.9 |  | 1,903.4
Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 283.1 |  | 283.1
Accumulated Amortization | (253.2) |  | (249.9)
Carrying Value | 29.9 |  | 33.2
Natural Gas Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,581.4 |  | 1,821.0
Accumulated Amortization | (700.2) |  | (916.0)
Carrying Value | 881.2 |  | 905.0
Amortization expense | 10.6 | 10.2 |
Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,350.3 |  | 1,350.3
Accumulated Amortization | (521.1) |  | (512.2)
Carrying Value | 829.2 |  | 838.1
Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 231.1 |  | 470.7
Accumulated Amortization | (179.1) |  | (403.8)
Carrying Value | 52.0 |  | 66.9
Petrochemical & Refined Products Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 226.3 |  | 226.3
Accumulated Amortization | (94.6) |  | (92.9)
Carrying Value | 131.7 |  | 133.4
Amortization expense | 1.7 | $ 2.0 |
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 181.4 |  | 181.4
Accumulated Amortization | (69.7) |  | (68.3)
Carrying Value | 111.7 |  | 113.1
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 44.9 |  | 44.9
Accumulated Amortization | (24.9) |  | (24.6)
Carrying Value | $ 20.0 |  | $ 20.3

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