Note 3 Effect of Nonperformance Risk on the Fair Value of Derivative Instruments (Details)	6 Months Ended	12 Months Ended
Mar. 31, 2012	Oct. 01, 2011
Effect of Nonperformance Risk on the Fair Value of Derivative Instruments [Line Items]
Derivative, Credit Risk	not material	not material

Describes the risk that a counterparty to the derivative instrument will not perform.

No definition available.

Name:	us-gaap_DerivativeCreditRisk
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration