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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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