Additional Accounting Policy and Balance Sheet Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Cost Method Investments	$ 38.8	$ 38.5
Foreign Currency Transaction Gain (Loss), before Tax	(11.0)	33.0	$ (17.0)
Deferred tax assets	$ 0.0	$ 303.3