Income Tax Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 29, 2012	Dec. 31, 2011
Tax loss carryforwards
Statutory Federal income tax rate	35.00%	35.00%	35.00%
Current deferred tax asset, unrealized foreign exchange losses	$ 0	$ 29.3
Unrecognized tax positions	59.8	137.9	109.2	104.4
Estimated interest and penalties	7.2	15.5	8.5
Retained Earnings Attributable to Foreign Subsidiaries Considered to be Indefinitely Invested	981.0
Minimum
Tax loss carryforwards
Statutes of limitations, term	3 years
Maximum
Tax loss carryforwards
Statutes of limitations, term	7 years
General Business | U.S. States
Tax loss carryforwards
Capital Loss Carryforwards, tax effect	8.6	8.6
General Business | U.S. States | Minimum
Tax loss carryforwards
Operating Loss and Tax Credit Carryforwards Expiration Date	2015
General Business | U.S. States | Maximum
Tax loss carryforwards
Operating Loss and Tax Credit Carryforwards Expiration Date	2031
General Business | Foreign Tax Authority
Tax loss carryforwards
Capital Loss Carryforwards, tax effect	142.1	134.9
General Business | Foreign Tax Authority | Maximum
Tax loss carryforwards
Operating Loss and Tax Credit Carryforwards Expiration Date	2034
General Business | Europe
Tax loss carryforwards
Capital Loss Carryforwards, tax effect	$ 17.6	$ 22.2