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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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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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period.

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Debt and Derivative Instruments (Short-term Commercial Paper Programs and Line of Credit Facility) (Details) - USD ($)		1 Months Ended	12 Months Ended
	Jan. 29, 2021	Dec. 31, 2020	Jan. 31, 2021	Feb. 02, 2020	Mar. 31, 2020	Feb. 29, 2020
Short-term Line of Credit and Commercial Paper Programs [Abstract]
Balance outstanding at fiscal year-end			$ 0	$ 974,000,000
Commercial Paper
Short-term Line of Credit and Commercial Paper Programs [Abstract]
Maximum borrowing capacity of credit facility	$ 3,000,000,000.0				$ 6,000,000,000.0	$ 3,000,000,000.0
Weighted average interest rate			0.00%	1.56%
Maximum amount outstanding at any month-end			$ 11,000,000	$ 2,097,000,000
Average daily short-term borrowings			11,000,000	$ 624,000,000
Revolving Credit Facility
Short-term Line of Credit and Commercial Paper Programs [Abstract]
Maximum borrowing capacity of credit facility			6,500,000,000
Revolving Credit Facility \| 5-year Back-up Credit Facility
Short-term Line of Credit and Commercial Paper Programs [Abstract]
Maximum borrowing capacity of credit facility		$ 2,000,000,000.0	$ 2,000,000,000.0
Expiration period		5 years	5 years
Revolving Credit Facility \| 364-day Back-up Credit Facility
Short-term Line of Credit and Commercial Paper Programs [Abstract]
Maximum borrowing capacity of credit facility		$ 1,000,000,000.0	$ 1,000,000,000.0
Expiration period		364 days	364 days
Revolving Credit Facility \| March 2020 Back-up Credit Facility
Short-term Line of Credit and Commercial Paper Programs [Abstract]
Maximum borrowing capacity of credit facility			$ 3,500,000,000
Expiration period	364 days		364 days