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Unaudited Condensed Consolidated Financial Statements (Details) - USD ($) |  | 6 Months Ended |
--- | --- | --- | ---
Jun. 29, 2020 | Jun. 30, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |
Debt Instrument, Capitalization Ratio | 60.00% | 57.70% |
6.875% Senior Notes, Due August 15, 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.875% | 6.875%
Senior Notes | Rowan Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 2,100,000,000 |
Debt Instrument, Missed Interest Payments |  | 58,500,000 |
Debt Instrument, Interest Payment |  | 79,200,000 |
Senior Notes | 6.875% Senior Notes, Due August 15, 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt |  | $ 122,900,000 |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.875% |

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