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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Debt Obligations and Commitments Debt Obligations and Commitments (Narrative) (Details) R in Billions	4 Months Ended
	Dec. 26, 2020 USD ($)	Sep. 05, 2020 USD ($)	Sep. 05, 2020 ZAR (R)	Dec. 28, 2019 USD ($)	Jun. 03, 2019 USD ($)
Debt Instrument [Line Items]
Long-term Debt, Current Maturities		$ 750,000,000
Derivative, Notional Amount		800,000,000
Commercial Paper		2,100,000,000
Line of Credit Facility, Current Borrowing Capacity		3,750,000,000			$ 3,750,000,000
Line of Credit Facility, Maximum Borrowing Capacity		4,500,000,000
Interest rate derivatives
Debt Instrument [Line Items]
Derivative, Notional Amount		4,200,000,000		$ 5,000,000,000.0
Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 1,100,000,000
Two Point One Five Percent Notes Due 2020 [Member] \| Subsequent Event [Member] \| Note Due 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 1,100,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.15%
Debt Instrument, Repurchased Face Amount	$ 1,100,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.15%
Pioneer Bridge Loan Facilities [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding		$ 1,300,000,000	R 21.7