Segment Information Specified Items Included in Segment EBT (Details) (USD $) In Millions	12 Months Ended
Sep. 25, 2011	Sep. 26, 2010	Sep. 27, 2009
Revenue from External Customer [Line Items]
Interest expense	$ (114)	$ (43)	$ (13)
QCT [Member]
Revenue from External Customer [Line Items]
Revenue from external customers	8,856	6,686	6,125
Intersegment revenues	3	9	10
Interest income	1	1	4
Interest expense	1	1	0
QTL [Member]
Revenue from External Customer [Line Items]
Revenue from external customers	5,422	3,659	3,603
Intersegment revenues	0	0	2
Interest income	1	2	12
Interest expense	0	0	1
QWI [Member]
Revenue from External Customer [Line Items]
Revenue from external customers	656	628	638
Intersegment revenues	0	0	3
Interest income	0	2	1
Interest expense	0	(4)	1
QSI [Member]
Revenue from External Customer [Line Items]
Revenue from external customers	0	0	0
Intersegment revenues	0	0	0
Interest income	20	8	3
Interest expense	$ 99	$ 27	$ 0

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The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 20

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-Name Statement of Financial Accounting Standard (FAS)

-Number 34

-Paragraph 21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-Name Federal Regulation (FR)

-Number Title 12

-Chapter V

-Section 563c.102

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-Subsection II

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Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.

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

-Publisher SEC

-Name Regulation S-X (SX)

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-Article 5

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

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-Name Statement of Financial Accounting Standard (FAS)

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-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.

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-Name Accounting Standards Codification

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Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-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.

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Amount of revenue from transactions with other operating segments of the same entity.

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-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.

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