Income Taxes (Tables)

9 Months Ended

Sep. 30, 2014

Income Tax Disclosure [Abstract]

Income taxes

The Company's provision for income taxes in interim periods is computed by applying the appropriate estimated annual effective tax rates to income or loss before income taxes for the period. In addition, non-recurring or discrete items, including interest on prior year tax liabilities, are recorded during the period(s) in which they occur.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Provision (benefit) for income taxes	$	(2.2	)	$	19.9		$	53.4		$	78.0
Effective tax rate	17.7		%	36.4		%	33.1		%	35.5		%