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Income taxes (Tables)
3 Months Ended
Mar. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
Three Months Ended March 31,
20232022
Continuing operations  
Provision (benefit) for income taxes (in millions)$20.3 (41.1)
Effective tax rate53.6 %(123.8 %)