Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Unrecognized income tax benefits that would affect effective tax rate	$ 145.1	$ 133.0
Accrued or deferred taxes relating to uncertain income tax positions	64.4	61.2
Accrued interest and penalties relating to unrecognized tax benefits	21.5	$ 18.3
Noncash deferred income tax charge	$ 31.6