Restructuring and Severance Charges - Restructuring Activities and Accrued Liabilities (Details) $ in Millions	3 Months Ended
	Jan. 03, 2016 USD ($)
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 6.2
Provisions	1.7
Cash expenditures	(2.1)
Other non-cash settlement	(0.1)
Ending Balance	5.7
Employee Severance
Restructuring Reserve [Roll Forward]
Beginning Balance	2.9
Provisions	0.7
Cash expenditures	(1.1)
Other non-cash settlement	0.0
Ending Balance	2.5
Contract Termination Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	3.2
Provisions	0.7
Cash expenditures	(0.7)
Other non-cash settlement	(0.1)
Ending Balance	3.1
Other Associated Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	0.1
Provisions	0.3
Cash expenditures	(0.3)
Other non-cash settlement	0.0
Ending Balance	$ 0.1