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Summary of Significant Accounting Principles - Remaining Performance Obligation (Details)
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction  
Performance obligations expected to be satisfied $ 428.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction  
Performance obligations expected to be satisfied $ 386.6
Performance obligations expected to be satisfied, percentage 90.00%
Performance obligations expected to be satisfied, expected timing 12 months