Financial Instruments (Details) - Net investment hedges - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Mar. 25, 2016	Mar. 27, 2015	Mar. 25, 2016	Mar. 27, 2015	Sep. 25, 2015
Financial Instruments
Notional amount of nonderivative instruments			$ 3,704		$ 3,880
Foreign exchange (losses) gains recorded as currency translation	$ (54)	$ 282	$ 1	$ 412

Current period adjustment resulting from gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity, gross of tax effect.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

Name:	us-gaap_TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseGrossOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration