Retirement and Post Retirement Health Care Plans (Schedule of Net Periodic Benefit Costs and Benefit Payments Expected Future Service) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 7.2	$ 8.1	$ 10.0
Interest Cost	9.3	9.8	10.7
Expected Return on Plan Assets	(11.2)	(11.9)	(11.5)
Amortization of Net Actuarial Loss	(2.3)	(3.1)	(4.3)
Amortization of Prior Service Cost	0.2	0.2	0.2
Net Periodic Benefit Cost	7.8	9.3	13.7
Prior Service Cost	0.1	0.1	0.1
Net Actuarial (Gain) Loss	1.5	2.0	2.8
Total Recognized in OCI	1.6	2.1	$ 2.9
2018	14.1
2019	13.9
2020	14.6
2021	15.6
2022	15.2
2023-2027	84.6
Postretirement Health Coverage
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.1	0.1
Interest Cost	0.4	0.5
Amortization of Net Actuarial Loss	0.0	(0.2)
Net Periodic Benefit Cost	0.5	$ 0.8
2018	0.9
2019	1.0
2020	1.1
2021	1.1
2022	1.1
2023-2027	$ 4.6