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Segments and Related Information (Schedule of Financial Information by Reportable Segment- EBITDA and Depreciation) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
EBITDA: |  |  |  |
EBITDA | $ 224.1 | $ 159.9 | $ 422.5 | $ 273.8
Depreciation and amortization | 107.4 | 67.5 | 197.9 | 128.0
Reportable Segments | Communications |  |  |  |
EBITDA: |  |  |  |
EBITDA | 72.7 | 76.4 | 121.5 | 127.2
Depreciation and amortization | 23.8 | 21.4 | 45.6 | 41.0
Reportable Segments | Clean Energy and Infrastructure |  |  |  |
EBITDA: |  |  |  |
EBITDA | 15.6 | 30.1 | 26.4 | 35.0
Depreciation and amortization | 10.5 | 4.7 | 18.1 | 8.7
Reportable Segments | Oil and Gas |  |  |  |
EBITDA: |  |  |  |
EBITDA | 138.1 | 80.1 | 305.7 | 154.5
Depreciation and amortization | 56.2 | 32.1 | 108.3 | 60.2
Reportable Segments | Electrical Transmission |  |  |  |
EBITDA: |  |  |  |
EBITDA | 9.3 | (3.2) | 12.9 | 5.1
Depreciation and amortization | 14.1 | 6.6 | 20.2 | 12.4
Reportable Segments | Other |  |  |  |
EBITDA: |  |  |  |
EBITDA | 8.3 | 7.5 | 15.8 | 14.9
Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.0
Corporate |  |  |  |
EBITDA: |  |  |  |
EBITDA | (19.9) | (31.0) | (59.8) | (62.9)
Depreciation and amortization | $ 2.8 | $ 2.7 | $ 5.7 | $ 5.7

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