Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified			9 Months Ended
	Sep. 28, 2013	Dec. 29, 2012	Sep. 28, 2013 Other expense, net	Sep. 28, 2013 Recurring	Dec. 29, 2012 Recurring	Sep. 28, 2013 Recurring Cash and Cash Equivalents	Dec. 29, 2012 Recurring Cash and Cash Equivalents	Sep. 28, 2013 Recurring Other current assets	Dec. 29, 2012 Recurring Other current assets	Sep. 28, 2013 Quoted Prices in Active Markets (Level 1) Recurring	Dec. 29, 2012 Quoted Prices in Active Markets (Level 1) Recurring	Sep. 28, 2013 Significant Other Observable Inputs (Level 2) Recurring	Dec. 29, 2012 Significant Other Observable Inputs (Level 2) Recurring	Sep. 28, 2013 Fair Value Level 3 Non-recurring
Assets
Available for sale securities				$ 17.7	$ 18.6	$ 0.8	$ 0.9	$ 17.0	$ 17.7	$ 8.1	$ 9.3	$ 9.6	$ 9.3
Short-term investments				139.6								139.6
Derivative assets	12.1	10.0		12.1	10.0							12.1	10.0
Liabilities
Derivative liabilities	4.8	3.8		4.8	3.8					0.3	1.0	4.5	2.8
Carrying value of long-lived assets														8.3
Fair value of long-lived assets														4.8
Impairment charge of long-lived assets			$ 3.5