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Liabilities - Performance Obligations Amount (Details)
$ in Millions
3 Months Ended
Mar. 31, 2021
USD ($)
Performance obligations  
Remaining performance obligations $ 21.8
Minimum  
Performance obligations  
Performance obligation at time of contract origination 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01  
Performance obligations  
Percentage of remaining performance obligation expected to be recognized 80.00%