Debt (Major Components Of Debt) (Details) - USD ($)	Oct. 03, 2020	Sep. 28, 2019
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 0
Discount on senior notes	(45,000,000)	$ (48,000,000)
Other	216,000,000	216,000,000
Unamortized debt issuance costs	(60,000,000)	(65,000,000)
Total debt	11,339,000,000	11,932,000,000
Less current debt	548,000,000	2,102,000,000
Total long-term debt	10,791,000,000	9,830,000,000
Notes due June 2020 ("2020 Notes")
Debt Instrument [Line Items]
Long-term debt, gross	0	350,000,000
Notes due August 2020 ("2020 Notes")
Debt Instrument [Line Items]
Long-term debt, gross	0	400,000,000
4.10% Notes due September 2020 ("2020 Notes")
Debt Instrument [Line Items]
Long-term debt, gross	0	280,000,000
2.25% Notes due August 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 500,000,000	500,000,000
Stated interest rate	2.25%
4.50% Senior notes due June 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,000,000,000	1,000,000,000
Stated interest rate	4.50%
3.90% Notes due September 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000,000	400,000,000
Stated interest rate	3.90%
3.95% Notes due August 2024
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,250,000,000	1,250,000,000
Stated interest rate	3.95%
Four Point Zero Zero Percentage Senior Unsecured Notes Due March, Two Thousand Twenty Six [Domain]
Debt Instrument [Line Items]
Long-term debt, gross	$ 800,000,000	800,000,000
Stated interest rate	4.00%
3.55% Notes due June 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,350,000,000	1,350,000,000
Stated interest rate	3.55%
7.00% Notes due January 2028
Debt Instrument [Line Items]
Long-term debt, gross	$ 18,000,000	18,000,000
Stated interest rate	7.00%
Four Point Three Five Percentage Senior Unsecured Notes Due March Two Thousand And Twenty Nine [Member] [Domain]
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,000,000,000	1,000,000,000
Stated interest rate	4.35%
6.13% Notes due November 2032
Debt Instrument [Line Items]
Long-term debt, gross	$ 160,000,000	161,000,000
Stated interest rate	6.13%
4.88% Notes due August 2034
Debt Instrument [Line Items]
Long-term debt, gross	$ 500,000,000	500,000,000
Stated interest rate	4.88%
5.15% Notes due August 2044
Debt Instrument [Line Items]
Long-term debt, gross	$ 500,000,000	500,000,000
Stated interest rate	5.15%
4.55% Notes due June 2047
Debt Instrument [Line Items]
Long-term debt, gross	$ 750,000,000	750,000,000
Stated interest rate	4.55%
5.10% Notes due September 2048 ("2048 Notes")
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,500,000,000	1,500,000,000
Stated interest rate	5.10%
Term Loan Facility Due March 2022 [Domain]
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,500,000,000	0
Stated interest rate	1.69%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 0	70,000,000
Commercial Paper [Member]
Debt Instrument [Line Items]
Commercial Paper	$ 0	$ 1,000,000,000

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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