v3.24.2
Segment financial information - reconciliation of segment profitability measure (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Reconciliation of Adjusted EBITDA from net income or loss        
Net income (loss) $ 92.9 $ (7.3) $ 153.3 $ 114.2
Interest expense, net 60.9 73.4 125.2 147.1
Income tax expense 21.7 6.0 41.9 40.3
Loss on extinguishment of debt 1.9 1.6 4.4 3.9
Other income, net (1.6) (2.0) (2.7) (2.6)
Operating income 175.8 71.7 322.1 302.9
Amortization 74.9 78.9 150.2 157.3
Integration related expenses 0.0 (0.6) 0.0 8.1
Impairment charges 0.0 160.8 0.0 160.8
Adjusted Operating Income 277.2 318.9 535.6 642.0
Business Exit Costs And Employee Severance        
Reconciliation of Adjusted EBITDA from net income or loss        
Restructuring and severance charges/transformation expenses 9.7 7.2 32.9 11.9
External Advisors        
Reconciliation of Adjusted EBITDA from net income or loss        
Restructuring and severance charges/transformation expenses 16.2 0.0 29.5 0.0
Other $ 0.6 $ 0.9 $ 0.9 $ 1.0