Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Disclosures [Line Items]
Provision (benefit) for taxes on income	$ 11.1	$ (18.1)	$ 24.6	$ 3.7
Other Tax Expense (Benefit)			$ 25.6
Federal income tax at statutory rate			35.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ 4.2
Unrecognized Tax Benefits	$ 33.8		33.8		$ 33.3
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities During Next Twelve Months			$ 3.4