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Contracts with Customers - Performance Obligation Expected Timing of Satisfaction (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, period   1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 411.8  
Performance obligation, period 1 year 2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Dayrate Revenue    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 392.4  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Other Revenue    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount 19.4  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 96.7  
Performance obligation, period 2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Dayrate Revenue    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 88.2  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Other Revenue    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount 8.5  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 17.1  
Performance obligation, period  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Dayrate Revenue    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 15.3  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Other Revenue    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Performance obligation, amount $ 1.8