Business Combinations and Investments, Goodwill and Acquired Intangible Assets (Details) $ in Millions				3 Months Ended	9 Months Ended		12 Months Ended
	Jun. 05, 2015 USD ($)	Apr. 29, 2015 USD ($)	Feb. 02, 2015 USD ($)	Sep. 28, 2014 USD ($)	Sep. 27, 2015 USD ($)	Sep. 28, 2014 USD ($)	Dec. 28, 2014 USD ($) business	Dec. 29, 2013 USD ($)
Business Acquisition [Line Items]
Noncontrolling interest					$ 0.0		$ 41.2
Net income (loss) attributable to noncontrolling interest				$ (0.7)	(0.3)	$ (0.8)
Number of businesses acquired | business							4
Goodwill					1,149.5		$ 1,150.6
Acquired intangibles, net					$ 253.4		277.6
Ocean Aero
Business Acquisition [Line Items]
Equity method investment, ownership percentage by parent					36.90%
Subsidiaries | Industrial Control Machines SA
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired	$ 21.4
Indemnification holdback, amount as of acquisition date	$ 2.6
Subsidiaries | Optech Incorporated
Business Acquisition [Line Items]
Remaining percentage of voting interests acquired		49.00%
Payments to acquire businesses, gross		$ 22.0
Noncontrolling interest				$ 44.3		$ 44.3	41.2	$ 47.0
Net income (loss) attributable to noncontrolling interest					$ (0.3)		(0.8)
Foreign currency transaction and translation adjustment, before tax, portion attributable to noncontrolling interest					$ 1.3		$ 1.9
Subsidiaries | Bowtech Products Limited
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired			$ 18.8