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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Aug. 09, 2021
Sep. 30, 2021
Sep. 30, 2020
Related Party Transaction [Line Items]      
Contributions from non-controlling interests   $ 38.0 $ 2.0
SRS Mobility Ventures, LLC | Subsidiary Equity      
Related Party Transaction [Line Items]      
Ownership acquired percentage 33.34%    
Contributions from non-controlling interests $ 37.5