Income Taxes (Tables)

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Income taxes

	Three Months Ended June 30,					Six Months Ended June 30,
	2015			2014		2015		2014
Continuing operations
Provision for income taxes (in millions)	$	7.6		4.1		23.1		12.8
Effective tax rate	(40.2		%)	120.6	%	(220.0	%)	(16.8	%)