Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 835
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-Section 55
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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
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Short-term Borrowings and Long-term Debt (Schedule of Debt Repayments) (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)	Dec. 15, 2020 USD ($)	Oct. 25, 2020 USD ($)	Jul. 28, 2020 JPY (¥)	Jul. 08, 2020 USD ($)	Jun. 23, 2020 USD ($)	Oct. 20, 2019 USD ($)	Feb. 01, 2019 USD ($)
Debt Instrument [Line Items]
Repayment	$ 5,382	$ 1,907	$ 3,784
Unsecured debt [Member]
Debt Instrument [Line Items]
Repayment	5,382	1,907
Unsecured debt [Member] \| Variable Rate Debt, Due 2020 [Member]
Debt Instrument [Line Items]
Principal Amount								$ 750
Repayment	750
Unsecured debt [Member] \| 2.850% Debt, Due 2020 [Member]
Debt Instrument [Line Items]
Principal Amount								$ 1,250
Interest Rate								2.85%
Repayment	1,250
Unsecured debt [Member] \| 3.630% Debt Due 2020 [Member]
Debt Instrument [Line Items]
Principal Amount							$ 840
Interest Rate							3.63%
Repayment	840
Unsecured debt [Member] \| 1.600% Debt Due 2020 [Member]
Debt Instrument [Line Items]
Principal Amount \| ¥						¥ 10,000
Interest Rate						1.60%
Repayment	95
Unsecured debt [Member] \| 3.250% Debt Due 2020 [Member]
Debt Instrument [Line Items]
Principal Amount					$ 1,197
Interest Rate					3.25%
Repayment	1,197
Unsecured debt [Member] \| 1.900% Debt Due 2020 [Member]
Debt Instrument [Line Items]
Principal Amount				$ 1,250
Interest Rate				1.90%
Repayment	$ 1,250
Unsecured debt [Member] \| 4.125% Debt Due 2019 [Member]
Debt Instrument [Line Items]
Principal Amount										$ 364
Interest Rate										4.125%
Repayment		364
Unsecured debt [Member] \| Variable Rate Debt Due 2019 [Member]
Debt Instrument [Line Items]
Principal Amount									$ 300
Repayment		300
Unsecured debt [Member] \| 1.750% Debt, Due 2019 [Member]
Debt Instrument [Line Items]
Principal Amount									$ 1,200
Interest Rate									1.75%
Repayment		1,200
Unsecured debt [Member] \| Various [Member]
Debt Instrument [Line Items]
Principal Amount		43
Repayment		$ 43