Pensions Benefit Obligations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Pension Plans, Defined Benefit [Member]
Change in Projected Benefit Obligation [Roll Forward]
Service costs	$ 5.8	$ 2.9	$ 15.2	$ 8.9
Interest costs	11.9	12.7	35.8	38.2
Other Postretirement Benefits [Member]
Change in Projected Benefit Obligation [Roll Forward]
Service costs	0.1	0.1	0.4	0.5
Interest costs	$ 0.4	$ 0.4	$ 1.3	$ 1.4