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Acquisitions (Tables)
9 Months Ended
Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]  
Summary of Changes in Contingent Consideration Measured at Fair Value on a Recurring Basis Changes in contingent consideration measured at fair value on a recurring basis were as follows (in millions):
 Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Opening balance$26.9 $17.6 $20.9 $14.0 
Acquisitions and measurement period adjustments(0.3)4.0 7.1 12.8 
Payments(0.4)(3.3)(2.7)(9.1)
Changes in fair value included in net loss0.4 0.5 1.3 1.1 
Closing balance$26.6 $18.8 $26.6 $18.8