Income Taxes (Components Of Our Consolidated Earnings Before Taxes) (Details) (USD $) In Thousands	12 Months Ended
Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Results of operations, income before income taxes	$ 516,661	$ 391,934	$ 624,132
Domestic Country [Member]
Results of operations, income before income taxes	341,059	295,144	449,065
Foreign Country [Member]
Results of operations, income before income taxes	$ 175,602	$ 96,790	$ 175,067

Income before income taxes for oil and gas producing activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 19

-Paragraph 59S

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=6821537&loc=d3e62136-109447

Name:	us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration