Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Income Tax Contingency [Line Items]
Income from domestic operations included in income from continuing operations before income taxes	$ 213.8	$ 221.4	$ 176.7
Income from foreign operations included in income before taxes	44.4	60.7	47.3
Undistributed foreign earnings	193.3
Estimated deferred tax liability, undistributed foreign earnings	49.7
Valuation allowance, deferred tax asset, change in amount	4.4
Foreign tax credit carry forward	1.3
Expected decrease in unrecognized tax benefits over next 12 months	7.0
Interest related to unrecognized tax benefit	0.6	0.2	2.2
Interest accrued for unrecognized tax benefits	2.1	$ 2.9	$ 3.4
Foreign Tax Authority
Income Tax Contingency [Line Items]
Operating loss carryforwards	52.0
Canada, Federal | Investment tax credit carryforward
Income Tax Contingency [Line Items]
Tax credit carryforwards subject to expiration	24.2
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Operating loss carryforwards subject to expiration	7.1
Internal Revenue Service (IRS) | Research tax credit carryforward
Income Tax Contingency [Line Items]
Tax credit carryforwards subject to expiration	0.8
State Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carryforwards	3.9
Operating loss carryforwards subject to expiration	119.3
Tax credit carryforwards subject to expiration	1.9
Tax credit carryforwards not subject to expiration	3.4
State Jurisdiction | Research tax credit carryforward
Income Tax Contingency [Line Items]
Tax credit carryforwards	$ 5.3