Restructuring Restructuring (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
Mar. 31, 2012 employees	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Restructuring [Abstract]
Charges to operations	$ 20,802,000	$ 0	$ 20,802,000	$ 0
Severance costs	20,000,000
Number of employees terminated	168
Other restructuring costs	800,000
Gross lease commitments related to restructured facilities	1,600,000
Defined benefit plan, curtailments	1,200,000
Sublease commitments related to restructured facilities	$ 800,000

The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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-Glossary Plan Curtailment

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+ Details

- Definition

The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

+ References+ Details

- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

+ References+ Details

- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

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