Quarterly report pursuant to Section 13 or 15(d)

Revenue - Fees Type in Typical Service Contract and Related Recognition (Details)

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Revenue - Fees Type in Typical Service Contract and Related Recognition (Details) - Accounting Standards Update 2014-09
3 Months Ended
Mar. 31, 2019
Day rate  
Revenue from Contract with Customers [Line Items]  
Revenue Recognition Revenue is recognized based on the day rates earned as it relates to the level of service provided for each day throughout the contract.
Initial mobilization  
Revenue from Contract with Customers [Line Items]  
Revenue Recognition Revenue is estimated at contract inception and included in the transaction price to be recognized ratably over contract term.
Demobilization  
Revenue from Contract with Customers [Line Items]  
Revenue Recognition Unconstrained demobilization revenue is estimated at contract inception, included in the transaction price, and recognized ratably over the contract term.
Reimbursement  
Revenue from Contract with Customers [Line Items]  
Revenue Recognition Recognized (gross of costs incurred) at the amount billed to the customer.