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Restructuring and Acquisition Charges Restructuring and Related Activities (Tables)
6 Months Ended
Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]  
Restructuring, Impairment, and Other Activities Disclosure [Text Block]
Three Months Ended June 30,Six Months Ended June 30,
(in millions)2023202220232022
Severance and other employment-related charges$5.8 8.3 $31.5 11.6 
Restructuring, pre-acquisition and post-acquisition charges5.1 13.9 13.3 28.1 
Stock-based compensation expense for post-acquisition retention awards1.5 2.7 3.3 5.4 
Fair value adjustments to earn-out liabilities(0.6)1.0 (0.6)0.3 
Restructuring and acquisition charges$11.8 25.9 $47.5 45.4