Income Taxes (Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 29, 2019	Dec. 30, 2018
Long-term:
Accrued liabilities	$ 20.5	$ 20.3
Inventory valuation	14.5	11.9
Accrued vacation	7.8	7.8
Deferred compensation and other benefit plans	30.2	20.0
Postretirement benefits other than pensions	1.8	2.5
Operating lease liabilities	33.5
Capitalization of research and development	38.8	0.0
Tax credit and net operating loss carryforward	30.2	43.8
Valuation allowance	(6.1)	(5.4)
Total deferred income tax assets	171.2	100.9
Long-term:
Property, plant and equipment differences	16.0	20.5
Intangible amortization	133.5	112.0
Operating lease right-of-use assets	33.5
Other	5.5	7.1
Total deferred income tax liabilities	188.5	139.6
Net deferred income tax liabilities	$ 17.3	$ 38.7