Pension and Other Benefit Programs - Changes in Level 3 Assets (Detail) - USD ($) $ in Millions	12 Months Ended
Oct. 01, 2016	Oct. 03, 2015
Fair value of plans' assets
Beginning Balance	$ 1,200	$ 1,266
Additions	174	168
Distributions	(300)	(332)
Realized and unrealized gain (loss)	(7)	98
Ending Balance	$ 1,067	$ 1,200

Fair value of investments in certain entities that calculate net asset value per share, including, but not limited to, by unit, membership interest, or other ownership interest. Investments include, but are not limited to, investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds.

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=36462937&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 6A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=SL6742756-110258

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

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.

+ References

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- Definition

Amount of unrealized gain (loss) recognized in the income statement from investments for which net asset value per share is calculated on unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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