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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Purchase Obligations
Purchase obligations as of September 30, 2020 are as follows (in millions):
2020 (remaining)$27.8 
202162.5 
202213.4 
20238.5 
20248.0 
Thereafter15.7 
Total purchase commitments$135.9