Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax			$ (3.0)
Pension Costs [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax			(3.0)
Pension Costs [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax amount	$ 2.4	$ 1.2	4.7	$ 2.4
Tax	(0.9)	(0.4)	(1.7)	(0.7)
Net of tax	$ 1.5	$ 0.8	$ 3.0	$ 1.7