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Revenue and Contract Balances - Performance Obligation (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Remaining performance obligation $ 120.8 $ 75.7
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 satisfaction period 12 months  
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Percentage of remaining obligation expected to be satisfied (percent) 50.00%  
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Percentage of remaining obligation expected to be satisfied (percent) 60.00%