Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Mar. 31, 2015
Income Tax Contingency [Line Items]
Change in income tax expense - U.S.		$ (15.1)
Change in income tax expense		$ (4.9)
Effective income tax rate		22.50%	23.00%
Release of reserves for uncertain tax positions	$ 0.9