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v3.20.2

Property and Equipment Property and Equipment (Schedule of Property and Equipment) (Details) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) floater | Mar. 31, 2020 $ / bbl | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) rigs $ / bbl | Sep. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
PROPERTY AND EQUIPMENT, AT COST | $ 13,215.5 |  |  | $ 13,215.5 |  |  | $ 18,393.8
Loss on impairment | $ 0.0 |  | $ 88.2 | $ 3,646.2 | $ 90.7 |  |
Number of Rigs Impaired | floater | 2 |  |  |  |  |  |
Oil and Gas, Average Sale Price | $ / bbl |  | 60 |  | 20 |  |  |
Impairment of Long-Lived Assets to be Disposed of | $ 0.0 |  |  | $ 15.0 |  |  |
Number Of Rigs Held-for-Sale | rigs |  |  |  | 3 |  |  |
Assets Held-for-sale, Not Part of Disposal Group | 4.6 |  |  | $ 4.6 |  |  |
Drilling rigs and equipment |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
PROPERTY AND EQUIPMENT, AT COST | 12,552.2 |  |  | 12,552.2 |  |  | 17,714.0
Work-in-progress |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
PROPERTY AND EQUIPMENT, AT COST | 473.3 |  |  | 473.3 |  |  | 473.6
Other |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
PROPERTY AND EQUIPMENT, AT COST | 190.0 |  |  | 190.0 |  |  | $ 206.2
Floaters, Jackups And Spare Equipment |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Loss on impairment |  |  |  | 3,600.0 |  |  |
Property, Plant, and Equipment, Fair Value Disclosure |  |  |  |  |  | $ 72.3 |
Floaters And Spare Equipment |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use | 817.3 |  |  |  |  |  |
Property, Plant, and Equipment, Fair Value Disclosure | $ 69.0 |  |  | $ 69.0 |  |  |

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