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Income taxes (Tables)
3 Months Ended
Mar. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of relationship between income tax expense or benefit and income or loss before income taxes The following table presents the relationship between income tax expense and income before income taxes:
(in millions)
Three months ended March 31,
2023
2022
Income before income taxes
$155.8 $241.8 
Income tax expense
(34.3)(51.4)
Effective income tax rate22.0 %21.3 %