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Financial Instruments (Details) € in Millions, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 29, 2019 USD ($)	Mar. 30, 2018 USD ($)	Mar. 29, 2019 USD ($)	Mar. 30, 2018 USD ($)	Sep. 28, 2018 USD ($)	Sep. 25, 2015 EUR (€)
Cash flow hedges | Cross-currency swap contracts
Financial Instruments
Notional amount | €						€ 1,000
Interest paid in foreign currency, fixed interest rate						3.50%
Interest received in U.S. dollars, weighted-average fixed interest rate						5.33%
Fair Value of Liability Positions	$ 30		$ 30		$ 100
Gains (losses) recorded in other comprehensive income (loss)	13	$ (22)	32	$ (32)
Gains (losses) excluded from the hedging relationship	21	(31)	38	(50)
Net investment hedges | Intercompany loans and external borrowings
Financial Instruments
Notional amount of non derivative instruments			3,415		$ 4,064
Foreign currency exchange gains (losses)	36	$ (79)	112	$ (145)
Net investment hedges | Cross-currency swap contracts
Financial Instruments
Notional amount	$ 1,901		$ 1,901
Interest paid in foreign currency, fixed interest rate	0.00%		0.00%
Interest received in U.S. dollars, weighted-average fixed interest rate	3.00%		3.00%
Foreign currency exchange gains (losses)	$ 42		$ 37

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
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Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fixed interest rate related to the interest rate derivative.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Amount, before tax, of increase (decrease) in the cumulative translation adjustment from gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

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