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Restructuring and Acquisition Charges Restructuring and Related Activities (Tables)
 9 Months Ended
Sep. 30, 2025
Restructuring Cost and Reserve [Line Items]  
Restructuring, Impairment, and Other Activities Disclosure [Text Block] Restructuring and acquisition charges are presented in the table below.
Three Months Ended September 30,Nine Months Ended September 30,
(in millions)2025202420252024
Severance and other employment-related charges$5.4 6.1 $30.8 17.8 
Restructuring, pre-acquisition and post-acquisition charges5.2 5.0 22.9 18.5 
Stock-based compensation expense for post-acquisition retention awards0.7 1.0 2.1 1.6 
Fair value adjustments to earn-out liabilities0.4 (20.9)(3.1)(33.5)
Restructuring and acquisition charges$11.7 (8.8)$52.7 4.4