Comprehensive Income (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Tax expenses allocated to other comprehensive income
Net actuarial loss, prior service cost and net transition asset	$ 1.3	$ 1.1	$ 2.6	$ 2.7
Effective portion of gains or losses on cash flow hedges	0.7	0.2	1.4	1.7
Income tax expense related to items of other comprehensive income	$ 2.0	$ 1.3	$ 4.0	$ 4.4