Debt (Major Components Of Debt) (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 28, 2019
Debt Instrument [Line Items]
Discount on senior notes	$ (46)	$ (48)
Other	270	216
Unamortized debt issuance costs	(61)	(65)
Total debt	12,120	11,932
Less current debt	1,142	2,102
Less current debt	10,978	9,830
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	200	70
Commercial paper
Debt Instrument [Line Items]
Long-term Commercial Paper, Noncurrent	$ 1,000
Commercial paper		1,000
Term Loan Facility Due March 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Long-term Debt, Gross	$ 0	0
Notes due June 2020 (2.13% at 3/28/2020)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.13%
Long-term Debt, Gross	$ 350	350
Notes due August 2020 (2.15% at 3/28/2020)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.15%
Long-term Debt, Gross	$ 400	400
4.10% Notes due September 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.10%
Long-term Debt, Gross	$ 279	280
2.25% Notes due August 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.25%
Long-term Debt, Gross	$ 500	500
4.50% Senior notes due June 2022
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Long-term Debt, Gross	$ 1,000	1,000
3.90% Senior notes due September 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.90%
Long-term Debt, Gross	$ 400	400
3.95% Notes due August 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Long-term Debt, Gross	$ 1,250	1,250
4.00% Notes due March 2026 (2026 Notes)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.00%
Long-term Debt, Gross	$ 800	800
3.55% Notes due June 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.55%
Long-term Debt, Gross	$ 1,350	1,350
7.00% Notes due January 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Long-term Debt, Gross	$ 18	18
4.35% Notes due March 2029 (2029 Notes)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.35%
Long-term Debt, Gross	$ 1,000	1,000
6.13% Notes due November 2032
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.13%
Long-term Debt, Gross	$ 160	161
4.88% Notes due August 2034
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.88%
Long-term Debt, Gross	$ 500	500
5.15% Notes due August 2044
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.15%
Long-term Debt, Gross	$ 500	500
4.55% Notes due June 2047
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.55%
Long-term Debt, Gross	$ 750	750
5.10% Notes due September 2048 (2048 Notes)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.10%
Long-term Debt, Gross	$ 1,500	$ 1,500

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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