Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Oct. 03, 2014	Sep. 27, 2013
Current: [Abstract]
Inventory	$ 5.3	$ 3.7
Bad debts	0.2	0.2
Accrued compensation and benefits	5.0	4.0
Product returns, allowances and warranty	4.9	1.6
Restructuring	0.2	0.3
Other - net	0.3	0.5
Current deferred tax assets	15.9	10.3
Less valuation allowance	(6.4)	(3.2)
Net current deferred tax assets	9.5	7.1
Long-term: [Abstract]
Intangible assets	4.7	5.5
Share-based and other deferred compensation	39.4	37.0
Net operating loss carry forwards	12.7	20.3
Federal tax credits	13.0	16.0
State tax credits	43.1	38.5
Other - net	2.7	2.0
Long-term deferred tax assets	115.6	119.3
Less valuation allowance	(54.4)	(47.8)
Net long-term deferred tax assets	61.2	71.5
Deferred tax assets	131.5	129.6
Less valuation allowance	60.8	51.0
Net deferred tax assets	70.7	78.6
Deferred Tax Liabilities [Abstract]
Prepaid insurance	(0.8)	(0.8)
Current deferred tax liabilities	(0.8)	(0.8)
Property, plant and equipment	(11.6)	(14.3)
Intangible assets	(1.2)	(3.1)
Long-term deferred tax liabilities	(12.8)	(17.4)
Net deferred tax liabilities	(13.6)	(18.2)
Total deferred tax assets	$ 57.1	$ 60.4