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Debt (Narrative) (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended	6 Months Ended
	Nov. 29, 2018	Feb. 28, 2019	Mar. 30, 2019	Mar. 30, 2019	Feb. 01, 2019	Sep. 29, 2018
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount			$ 49	$ 49		$ 15
Four Point Zero Zero Percentage Senior Unsecured Notes due March, Two Thousand Twenty Six and Four Point Three Five Percentage Senior Unsecured Notes Due March, Two Thousand Twenty Nine [Domain]
Debt Instrument [Line Items]
Debt Issuance Costs, Gross					$ 26
Long-term Debt					1,800
Debt Instrument, Unamortized Discount					36
Proceeds from Issuance of Unsecured Debt		$ 2,764
5.10% Notes due September 2048 (2048 Notes)
Debt Instrument [Line Items]
Long-term Debt					1,000
Long-term Debt, Gross			$ 1,500	$ 1,500	1,500	500
Debt Instrument, Interest Rate, Stated Percentage			5.10%	5.10%
Four Point Zero Zero Percentage Senior Unsecured Notes Due March, Two Thousand Twenty Six [Domain]
Debt Instrument [Line Items]
Long-term Debt, Gross			$ 800	$ 800	$ 800	0
Debt Instrument, Interest Rate, Stated Percentage			4.00%	4.00%	4.00%
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	$ 1,000	$ 1,000	0
Debt Instrument, Interest Rate, Stated Percentage			4.35%	4.35%	4.35%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,750	$ 1,750
Amount available for borrowing under credit facility			1,750	1,750
Revolving credit facility			0	0		0
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount			0	0
Bilateral Letters Of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount			111	111
Commercial paper
Debt Instrument [Line Items]
Maximum borrowing capacity			1,000	1,000
Commercial paper			$ 182	$ 182		$ 605
Short-term Debt, Weighted Average Interest Rate, at Point in Time			2.64%	2.64%
Debt Instrument, Term				15 days
Term Loan [Member] | 364-Day due November 2019 [Member] [Domain]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			$ 1,800
Debt Instrument, Basis Spread on Variable Rate	1.125%

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- Definition

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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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Gross amount of debt extinguished.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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