Income Taxes (Tables)

3 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of effective income tax rate reconciliation

The effective tax rates for the three months ended March 31, 2014 and March 31, 2013 include the tax expense (benefit) of the following discrete items (in millions):

	Three Months Ended March 31,
	2014			2013
Tax on gain of equity investments, net of valuation allowance release of $24.7	$	35.6		$	—
Benefit from restructuring costs	$	(30.8	)	$	—
Tax settlement with Internal Revenue Service (“IRS”)	$	—		$	(27.8	)
Reinstatement of the U.S. federal R&D tax credit	$	—		$	(15.2	)