Income taxes

6 Months Ended

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.