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Contractual Commitments and Contingencies - Narrative (Details)
$ in Millions
9 Months Ended
Jan. 16, 2019
securityClassAction
Sep. 30, 2021
USD ($)
Commitments and Contingencies Disclosure [Abstract]    
Loss contingency accrual   $ 4.0
Payments for legal settlements   $ 7.7
Number of securities class actions | securityClassAction 2