Comprehensive Income (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Tax expenses allocated to other comprehensive income
Net actuarial (loss) gain, prior service cost and net transition asset	$ (3.9)	$ 0.1	$ (1.3)	$ 2.8
Effective portion of gains on cash flow hedges	0.9	0.8	2.3	2.5
Income tax (benefit) expense related to items of other comprehensive income	$ (3.0)	$ 0.9	$ 1.0	$ 5.3