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v3.20.2

Rowan Transaction (Narrative) (Details) $ / shares in Units, € in Millions, $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 11, 2019 USD ($) $ / shares | Apr. 11, 2019 EUR (€) | Sep. 30, 2020 USD ($) | Mar. 31, 2020 EUR (€) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2020 EUR (€) | Sep. 30, 2019 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Oct. 23, 2018 $ / shares
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Bargain Purchase, Adjustment |  |  | $ 0.0 |  |  | $ 53.0 | $ 6.3 |  | $ (659.8) |  |  |
Tax Assessment |  |  |  |  | $ 42.0 |  |  |  |  |  |  |
Deferred Tax Liabilities, Net |  |  | 37.3 |  | $ 99.0 |  | 37.3 |  |  |  |  |
OPERATING REVENUES |  |  | 285.3 |  |  | 551.3 | 1,130.7 |  | 1,541.1 |  |  |
NET LOSS ATTRIBUTABLE TO VALARIS |  |  | (670.9) |  |  | (197.1) | (4,784.6) |  | 18.0 |  |  |
Rowan Companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 16.2 |  | 3.1 |  |  |  | 3.1 |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 2.1 |  | 0.7 |  |  |  | 0.7 |  |  |  |  |
Impairment of Intangible Assets, Finite-lived |  |  |  |  |  |  | $ 5.7 |  |  |  |  |
Finite-Lived Intangible Assets, Remaining Amortization Period |  |  |  |  |  |  | 1 year 3 months 18 days | 1 year 3 months 18 days |  |  |  |
Amortization of intangible assets |  |  | 0.5 |  |  |  | $ 2.4 |  |  |  |  |
Unrecognized Tax Benefits, Increase Resulting from Acquisition | $ 50.4 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  | 0.2 |  |  | 18.0 |  |  |
OPERATING REVENUES |  |  |  |  |  | 138.9 |  |  | 286.2 |  |  |
NET LOSS ATTRIBUTABLE TO VALARIS |  |  |  |  |  | 31.2 |  |  | 95.1 |  |  |
Business Combination, Integration Related Costs |  |  |  |  |  | $ 16.0 |  |  | $ 85.4 |  |  |
Rowan Companies [Member] | Class A ordinary shares, U.S. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share | $ / shares | $ 15.88 |  |  |  |  |  |  |  |  |  |  |
Share Price | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 33.92
Forecast | Rowan Companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capitalized Contract Cost, Amortization |  |  |  |  |  |  |  |  |  | $ 2.0 | $ 0.4 |
Luxembourg Inland Revenue [Member] | Rowan Companies [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefit, maximum exposure |  |  |  | € 142.0 |  |  | 166.5 | € 142.0 |  |  |  |
Tax Assessment | € |  | € 93.0 |  |  |  |  |  |  |  |  |  |
Deferred Tax Liabilities, Net |  |  | $ 109.0 |  |  |  | $ 109.0 |  |  |  |  |

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