Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012
Current: [Abstract]
Inventory	$ 3.7	$ 5.3
Bad debts	0.2	0.2
Accrued compensation and benefits	4.0	4.0
Product returns, allowances and warranty	1.6	1.9
Restructuring	0.3	0.6
Other - net	0.5	0.5
Current deferred tax assets	10.3	12.5
Less valuation allowance	(3.2)	(3.1)
Net current deferred tax assets	7.1	9.4
Long-term: [Abstract]
Intangible assets	5.5	6.6
Share-based and other deferred compensation	37.0	37.6
Net operating loss carry forwards	20.3	35.8
Federal tax credits	16.0	17.2
State tax credits	38.5	33.6
Other - net	2.0	1.9
Long-term deferred tax assets	119.3	132.7
Less valuation allowance	(47.8)	(43.8)
Net long-term deferred tax assets	71.5	88.9
Deferred tax assets	129.6	145.2
Less valuation allowance	51.0	46.9
Net deferred tax assets	78.6	98.3
Deferred Tax Liabilities [Abstract]
Prepaid insurance	(0.8)	(0.9)
Current deferred tax liabilities	(0.8)	(0.9)
Property, plant and equipment	(14.3)	(17.6)
Intangible assets	(3.1)	(6.2)
Long-term deferred tax liabilities	(17.4)	(23.8)
Net deferred tax liabilities	(18.2)	(24.7)
Total deferred tax assets	$ 60.4	$ 73.6