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Share-Based Compensation (Schedule Of Stock Option Activity Under Plan) (Details)	3 Months Ended	6 Months Ended
	May 01, 2021 $ / shares shares	Jul. 31, 2021 $ / shares shares
Share-based Payment Arrangement [Abstract]
Stock option maximum term (years)		10 years
Stock option vesting period (years)		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, Balance (shares) | shares	53,029	53,029
Options outstanding, Forfeited (shares) | shares		(346)
Options outstanding, Exercised (shares) | shares		(10,446)
Options outstanding, Balance (shares) | shares		42,237
Options outstanding, Exercisable (shares) | shares		42,237
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, Balance (dollars per share) | $ / shares	$ 33,220	$ 33,220
Weighted average exercise price, Exercised (dollars per share) | $ / shares		34,320
Weighted average exercise price, Forfeited (dollars per share) | $ / shares		4,280
Weighted average exercise price, Balance (dollars per share) | $ / shares		33,180
Weighted average exercise price, Exercisable (dollars per share) | $ / shares		$ 33,180
Weighted Average Remaining Contractual Term (in years)	3 years 2 months 12 days	2 years 10 months 24 days
Weighted Average Remaining Contractual Term, Exercisable		2 years 10 months 24 days

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Stock Option Maximum Term

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Stock Option Vesting Period

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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