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Equity Method Investment In ARO Narrative (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) drillship jackup | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |
Number of Rigs Owned by ARO | jackup | 7 |  |
Total Number Of Contract Drilling Rigs | 61 |  |
ARO Rigs Under Construction | drillship | 2 |  |
Number of jackups leased by ARO | jackup | 9 |  |
Contracts Terms On Purchased Rigs | 15 years |  |
Number of Newbuild Jackup Rigs | jackup | 20 |  |
Order Period | 10 years |  |
Cost of ARO newbuild jackups, each | $ 176.0 |  |
Maximum Contingent Contributions To Joint Venture | $ 1,250.0 |  |
Minimum Renewal Contract Terms For NewBuild Rigs | 8 years |  |
Equity Method Investment Summarized Financial Information Accounts Receivable | $ 13.9 |  | $ 21.6
Equity Method Investment Summarized Financial Information Accounts Payable |  | $ 34.9 | 30.9
LONG-TERM NOTES RECEIVABLE FROM ARO | 442.7 |  | $ 442.7
Equity Method Investment Summarized Financial Information Interest Income | 2.6 | $ 4.6 |
Equity Method Investment Summarized Financial Information Interest Receivable | $ 2.6 |  |
ARO |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total Number Of Contract Drilling Rigs | jackup | 7 |  |
Middle East & Africa |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total Number Of Contract Drilling Rigs | 19 |  |
Middle East & Africa | ARO |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total Number Of Contract Drilling Rigs | jackup | 7 |  |
Middle East & Africa | Work-in-progress | ARO |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total Number Of Contract Drilling Rigs | drillship | 2 |  |
ARO |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |

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