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Income taxes
 6 Months Ended
Jun. 30, 2026
Income Tax Disclosure [Abstract]  
Income taxes
13.    Income taxes
The following table presents the relationship between income tax expense and income before income taxes:
(in millions)
Three months ended June 30,
Six months ended June 30,
2026
2025
2026
2025
Income before income taxes
$81.2$81.7$136.7$167.4
Income tax expense
(43.1)(17.0)(55.3)(38.2)
Effective income tax rate53.1 %20.8 %40.5 %22.8 %
Income tax expense in the quarter is based upon the estimated income for the full year. The composition of the income in different countries and adjustments, if any, in the applicable quarterly periods influences our expense.
The relationship between pre-tax income and income tax expense is affected by the impact of losses for which we cannot claim a tax benefit, non-deductible expenses and other items that increase tax expense without a relationship to income, such as withholding taxes and changes with respect to uncertain tax positions.
The change in the effective tax rate for the three and six months ended June 30, 2026, compared with the three and six months ended June 30, 2025, is primarily attributable to a change in estimate of uncertain tax positions.
Subsequent to June 30, 2026, we completed an internal reorganization. Because the reorganization occurred after the balance sheet date, the related tax effects have not been reflected in the consolidated financial statements as of and for the period ended June 30, 2026. We currently estimate that the reorganization will result in a deferred tax benefit of approximately $142.0 million, which is expected to be recognized during the subsequent interim reporting period.