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Commitments and Contingencies (Narrative) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 16, 2021
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2021
USD ($)
Jan. 20, 2021
defendant
Jul. 22, 2020
legal_matter
Loss Contingencies [Line Items]          
Increase (decrease) in contractual obligations not reflected in the balance sheet     $ 31.1    
Contractual obligation     $ 1,043.0    
Loss contingency $ 200.0        
Settlement Payment   $ 143.0      
Loss contingency accrual   $ 57.0      
California Action          
Loss Contingencies [Line Items]          
Number of legal matters | legal_matter         7
Number of defendants eliminated | defendant       8