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Revenue - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Concentration Risk [Line Items]    
Impairment of contract assets   $ 0
Revenue recognized, percentage 0.00% 0.40%
Revenue Recognition Timing | Revenue from Contract with Customer Benchmark | Transferred over Time    
Concentration Risk [Line Items]    
Concentration risk, percentage 64.00% 69.00%