Impairments and Exit Costs (Projected Future Expenses & Cash Expenditures) (Details) - Closure Initiatives [Member] $ in Millions	6 Months Ended
	Jul. 01, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Closure Initiatives, completion period	1 year
Facility closing [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Lease expiration date	Jan. 31, 2029
Minimum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected future costs	$ 3.2
Effect on future cash flows, amount	22.3
Minimum [Member] | Facility closing [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected future costs	2.9
Minimum [Member] | Other restructuring [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected future costs	0.3
Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected future costs	4.0
Effect on future cash flows, amount	27.4
Maximum [Member] | Facility closing [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected future costs	3.4
Maximum [Member] | Other restructuring [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected future costs	$ 0.6