Changes in Level 3 Plan Assets (Detail) (USD $) In Millions	12 Months Ended
Oct. 01, 2011	Oct. 02, 2010
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 977	$ 687
Additions	265	302
Distributions	(120)	(63)
Unrealized Gain (Loss)	107	51
Ending Balance	1,229	977
Diversified
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	166	109
Additions	7	46
Distributions	(6)	(3)
Unrealized Gain (Loss)	4	14
Ending Balance	171	166
Distressed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	196	106
Additions	34	80
Distributions	(24)	(14)
Unrealized Gain (Loss)	22	24
Ending Balance	228	196
Private equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	377	274
Additions	148	97
Distributions	(66)	(25)
Unrealized Gain (Loss)	33	31
Ending Balance	492	377
Venture capital
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	59	56
Additions	10	9
Distributions	(3)	(7)
Unrealized Gain (Loss)	9	1
Ending Balance	75	59
Real estate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	179	142
Additions	66	70
Distributions	(21)	(14)
Unrealized Gain (Loss)	39	(19)
Ending Balance	$ 263	$ 179

This element represents the total fair market value of investments in certain entities that calculate net asset value per share (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements, but may also be used in both the balance sheet and disclosure in the same submission. This item represents alternative investments as of the balance sheet date which may include investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds, and any other investment in which investee management calculates net asset value per share as the primary metric for investment value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph a

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 5

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-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

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Represents increases to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to purchases of or additional investments made during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value.

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Represents decreases to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to the sale of investments made during the period. The alternative investments represented by this item were subject to significant unobservable inputs (Level 3) for purposes of measuring fair value.

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Amount of unrealized gains and losses (net), included in the income statement for the period, from certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) and which the entity has or had based its calculation of fair market value on unobservable inputs (Level 3).

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

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