Stock-Based Compensation - Summary of Equity Award Transactions (Details) shares in Millions	6 Months Ended
Jul. 31, 2022 $ / shares shares
Number of Shares
RSUs, PSUs and Market-based PSUs, outstanding, beginning balance (in shares) \| shares	46
RSUs, PSUs and Market-based PSUs, granted (in shares) \| shares	22
RSUs, PSUs and Market-based PSUs, Vested restricted stock (in shares) \| shares	(11)
RSUs, PSUs and Market-based PSUs, canceled and forfeited (in shares) \| shares	(1)
RSUs, PSUs and Market-based PSUs, outstanding, ending balance (in shares) \| shares	56
Weighted Average Grant-Date Fair Value Per Share
RSUs, PSUs and Market-based PSUs, weighted average grant date fair value, beginning balance (in dollars per share) \| $ / shares	$ 114.19
RSUs, PSUs and Market-based PSUs, weighted average grant date fair value, granted (in dollars per share) \| $ / shares	187.51
RSUs, PSUs and Market-based PSUs, weighted average grant date fair value, Vested restricted stock (in dollars per share) \| $ / shares	86.77
RSUs, PSUs and Market-based PSUs, weighted average grant date fair value, canceled and forfeited (in dollars per share) \| $ / shares	131.19
RSUs, PSUs and Market-based PSUs, weighted average grant date fair value, ending balance (in dollars per share) \| $ / shares	$ 148.43

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
-Subparagraph (c)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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