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Intangible Assets and Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | $ 4,899.6 |  | $ 4,899.6 |  | $ 5,135.8
Accumulated Amortization | (1,669.9) |  | (1,669.9) |  | (1,826.7)
Carrying Value | 3,229.7 |  | 3,229.7 |  | 3,309.1
Amortization expense | 37.5 | $ 36.6 | 73.6 | $ 76.2 |
Forecasted amortization expense [Abstract] |  |  |  |  |
Remainder of 2021 | 73.0 |  | 73.0 |  |
2022 | 160.3 |  | 160.3 |  |
2023 | 168.1 |  | 168.1 |  |
2024 | 164.4 |  | 164.4 |  |
2025 | 162.9 |  | 162.9 |  |
Impairment of intangible assets |  |  | 6.8 |  |
NGL Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 613.8 |  | 613.8 |  | 610.4
Accumulated Amortization | (284.4) |  | (284.4) |  | (276.3)
Carrying Value | 329.4 |  | 329.4 |  | 334.1
Amortization expense | 6.1 | 6.3 | 12.1 | 12.8 |
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 447.8 |  | 447.8 |  | 447.8
Accumulated Amortization | (227.9) |  | (227.9) |  | (221.3)
Carrying Value | 219.9 |  | 219.9 |  | 226.5
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 166.0 |  | 166.0 |  | 162.6
Accumulated Amortization | (56.5) |  | (56.5) |  | (55.0)
Carrying Value | 109.5 |  | 109.5 |  | 107.6
Crude Oil Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 2,478.1 |  | 2,478.1 |  | 2,478.1
Accumulated Amortization | (578.4) |  | (578.4) |  | (541.5)
Carrying Value | 1,899.7 |  | 1,899.7 |  | 1,936.6
Amortization expense | 19.1 | 18.8 | 36.9 | 39.7 |
Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 2,195.0 |  | 2,195.0 |  | 2,195.0
Accumulated Amortization | (322.1) |  | (322.1) |  | (291.6)
Carrying Value | 1,872.9 |  | 1,872.9 |  | 1,903.4
Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 283.1 |  | 283.1 |  | 283.1
Accumulated Amortization | (256.3) |  | (256.3) |  | (249.9)
Carrying Value | 26.8 |  | 26.8 |  | 33.2
Natural Gas Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 1,581.4 |  | 1,581.4 |  | 1,821.0
Accumulated Amortization | (710.8) |  | (710.8) |  | (916.0)
Carrying Value | 870.6 |  | 870.6 |  | 905.0
Amortization expense | 10.6 | 9.6 | 21.2 | 19.8 |
Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 1,350.3 |  | 1,350.3 |  | 1,350.3
Accumulated Amortization | (530.6) |  | (530.6) |  | (512.2)
Carrying Value | 819.7 |  | 819.7 |  | 838.1
Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 231.1 |  | 231.1 |  | 470.7
Accumulated Amortization | (180.2) |  | (180.2) |  | (403.8)
Carrying Value | 50.9 |  | 50.9 |  | 66.9
Petrochemical & Refined Products Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 226.3 |  | 226.3 |  | 226.3
Accumulated Amortization | (96.3) |  | (96.3) |  | (92.9)
Carrying Value | 130.0 |  | 130.0 |  | 133.4
Amortization expense | 1.7 | $ 1.9 | 3.4 | $ 3.9 |
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 181.4 |  | 181.4 |  | 181.4
Accumulated Amortization | (71.1) |  | (71.1) |  | (68.3)
Carrying Value | 110.3 |  | 110.3 |  | 113.1
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 44.9 |  | 44.9 |  | 44.9
Accumulated Amortization | (25.2) |  | (25.2) |  | (24.6)
Carrying Value | $ 19.7 |  | $ 19.7 |  | $ 20.3

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