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Income taxes | 6 Months Ended
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Jun. 30, 2020
Income Tax Disclosure [Abstract] |
Income taxes | Income taxes
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Continuing operations |  |  |  |  |  |  |
Provision (benefit) for income taxes (in millions) | $ | (43.2 | ) |  | 12.7 |  |  | $ | (55.4 | ) |  | 22.4 |
Effective tax rate | 158.8 | % |  | 47.4 | % |  | 151.4 | % |  | 43.9 | %
2020 Compared to U.S. Statutory Rate The effective income tax rate on continuing operations in the first six months of 2020 was greater than the 21% U.S. statutory tax rate primarily due to the geographical mix of earnings, the seasonality of book losses for which no tax benefit can be recorded, nondeductible expenses in Mexico, taxes on cross border payments and U.S. taxable income limitations, and the characterization of a French business tax as an income tax, partially offset by the tax benefits related to the distribution of share-based payments. 2019 Compared to U.S. Statutory Rate The effective income tax rate on continuing operations in the first six months of 2019 was greater than the 21% U.S. statutory tax rate primarily due to the geographical mix of earnings, the seasonality of book losses for which no tax benefit can be recorded, nondeductible expenses in Mexico, taxes on cross border payments and the characterization of a French business tax as an income tax, partially offset by the tax benefits related to the distribution of share-based payments.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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