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Contracts with Customers - Contract Costs (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]    
Current deferred mobilization and contract preparation costs $ 25.7 $ 38.4
Non-current deferred mobilization and contract preparation costs 24.1 17.1
Total deferred mobilization and contract preparation asset $ 49.8 $ 55.5