Retirement Plans - U.S. and Non U.S. Pension Plans (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 25, 2015
U.S. Plans
Defined Benefit Plan Disclosure
Accumulated benefit obligation	$ 1,250	$ 1,170
Pension plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	1,250	1,170
Fair value of plan assets	929	879
Pension plans with projected benefit obligations in excess of plan assets:
Projected benefit obligation	1,250	1,170
Fair value of plan assets	929	879
Non-U.S. Plans
Defined Benefit Plan Disclosure
Accumulated benefit obligation	2,389	2,041
Pension plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	2,380	1,994
Fair value of plan assets	1,361	1,119
Pension plans with projected benefit obligations in excess of plan assets:
Projected benefit obligation	2,534	2,188
Fair value of plan assets	$ 1,371	$ 1,167

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=73719040&loc=d3e4179-114921

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If aggregate disclosures are presented, the aggregate benefit obligation for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 3
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