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Stock-Based Awards - Summary of Stock-Based Awards Activity (Details) shares in Thousands	6 Months Ended
	Jul. 31, 2021 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options, Beginning Balance | shares	36
Stock Options, Exercised/vested | shares	(19)
Stock Options, Forfeited/expired | shares	(1)
Stock Options, Ending Balance | shares	16
Stock Options, Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 52.15
Stock Options, Weighted Average Exercise Price, Exercised/vested | $ / shares	55.41
Stock Options, Weighted Average Exercise Price, Forfeited/expired | $ / shares	51.27
Stock Options, Weighted Average Exercise Price, Ending Balance | $ / shares	$ 48.25
Nonvested Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Awards/ Share Units, Beginning Balance | shares	3,451
Stock Awards/ Share Units, Granted | shares	614
Stock Awards/ Share Units, Exercised/vested | shares	(1,057)
Stock Awards/ Share Units, Forfeited/expired | shares	(130)
Stock Awards/ Share Units, Ending Balance | shares	2,878
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 32.09
Stock Awards/ Share Units, Awards/Units, Weighted Average Grant Date Fair Value, Granted | $ / shares	56.56
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Exercised/vested | $ / shares	35.22
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Forfeited/expired | $ / shares	33.05
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 36.12
Performance Share Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Awards/ Share Units, Beginning Balance | shares	1,037
Stock Awards/ Share Units, Granted | shares	211
Stock Awards/ Share Units, Exercised/vested | shares	(211)
Stock Awards/ Share Units, Forfeited/expired | shares	(33)
Stock Awards/ Share Units, Ending Balance | shares	1,004
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 49.95
Stock Awards/ Share Units, Awards/Units, Weighted Average Grant Date Fair Value, Granted | $ / shares	58.99
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Exercised/vested | $ / shares	72.21
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Forfeited/expired | $ / shares	30.42
Stock Awards/ Share Units, Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 47.82

X

- Definition

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

+ References

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-SubTopic 10
-Section 50
-Paragraph 2
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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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

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

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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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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.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Number of share options (or share units) exercised during the current period.

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