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Equity Method Investment in ARO Equity Method Investment In ARO Narrative (Details) $ in Millions | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) rigs | Dec. 31, 2019 USD ($) | Dec. 31, 2019 jackup | Dec. 31, 2019 rigs | Dec. 31, 2018 USD ($) | Oct. 31, 2018 rigs
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Shareholder Notes Receivable, Terms |  | 10 years |  |  |  |  |
Contributions to establish joint venture |  | $ 25.0 |  |  |  |  |
Number of rigs sold | rigs |  |  |  |  |  |  | 2
LONG-TERM NOTES RECEIVABLE FROM ARO |  |  | $ 452.9 |  |  | $ 0.0 |
Contract terms on purchased rigs |  | 15 years |  |  |  |  |
Contract re-pricing and renewal |  | 3 years |  |  |  |  |
Number of Rigs Owned by ARO |  |  |  | 7 | 7 |  |
Number of jackups leased by ARO | 9 | 9 |  | 9 |  |  |
Number of rigs leased In operation | rigs |  | 9 |  |  |  |  |
Number of newbuild jackup rigs | jackup |  |  |  | 20 |  |  |
Order Period |  | 10 years |  |  |  |  |
Contract Terms For NewBuild Rigs |  | 8 years |  |  |  |  |
Maximum contingent contributions to joint venture |  |  | 1,250.0 |  |  |  |
Minimum renewal contract terms for newbuild rigs |  | 8 years |  |  |  |  |
Accounts receivable |  |  | 21.8 |  |  |  |
Accounts payable |  |  | 0.7 |  |  |  |
Due from joint ventures |  |  | $ 14.2 |  |  |  |
Interest income | $ 16.8 |  |  |  |  |  |
ARO |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage | 50.00% | 50.00% |  |  |  |  |
Notes Receivable | LIBOR |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  | 2.00% |  |  |  |  |

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