Accumulated Other Comprehensive Income (Reclassifications Out of Accumulated OCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other expense	$ (0.8)	$ (0.6)
Income tax benefit	18.5	15.9
Amount Reclassified from AOCI | Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other expense	1.4	0.9
Income tax benefit	(0.3)	(0.3)
Net of tax	1.1	0.6
Amount Reclassified from AOCI | Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax benefit	(2.6)	(1.9)
Amortization of defined benefit pension and postretirement plan items:
Amortization of prior service cost	(1.5)	(1.1)
Amortization of net actuarial loss	9.0	5.9
Total before tax	7.5	4.8
Total	$ 4.9	$ 2.9