Accumulated Other Comprehensive Income (Loss) (Reclassifications Out of Accumulated OCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss recognized in income on derivatives	$ 2.1	$ 1.8	$ (2.1)	$ (7.0)
Income tax expense (benefit)	13.1	13.0	49.9	51.0
Amount Reclassified from AOCI | Cash Flow Hedges and Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss recognized in income on derivatives	2.4	0.6	5.6	2.4
Income tax expense (benefit)	(0.6)	(0.1)	(1.4)	(0.6)
Total	1.8	0.5	4.2	1.8
Amount Reclassified from AOCI | Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax expense (benefit)	(2.6)	(1.8)	(7.8)	(4.8)
Amortization of defined benefit pension and postretirement plan items:
Amortization of prior service cost	(1.5)	(1.2)	(4.5)	(3.6)
Amortization of net actuarial loss	8.9	6.1	26.0	16.4
Total before tax	7.4	4.9	21.5	12.8
Total	$ 4.8	$ 3.1	$ 13.7	$ 8.0