Defined Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Amounts recognized in accumulated other comprehensive income
Net actuarial loss recognized	$ (58.1)		$ (58.1)
Components of net periodic benefit cost
Service cost - administrative costs	0.4	$ 0.1	0.8	$ 0.3
Interest costs on benefits obligation	1.4	1.5	2.8	3.0
Expected return on assets	(1.2)	(1.5)	(2.4)	(3.0)
Net actuarial loss amortization	0.4	0.2	0.8	0.5
Net periodic benefit cost	1.0	$ 0.3	2.0	0.8
Employer contributions			0.5	$ 0.4
Accumulated other comprehensive loss related to plan, before tax	58.1		58.1
Accumulated other comprehensive loss related to plan, net of tax	35.7		$ 35.7
Minimum
Components of net periodic benefit cost
Expected employer contributions in remainder of fiscal year	40.0
Maximum
Components of net periodic benefit cost
Expected employer contributions in remainder of fiscal year	$ 45.0