Shareholders' Equity (Details 2) - $ / shares	12 Months Ended
Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Number of Shares
Restricted shares outstanding at end of fiscal year	257,890
Performance shares
Number of Shares
Restricted shares outstanding at end of fiscal year	45,000
Weighted-average grant date fair value
Restricted shares granted (in dollars per share)	$ 79
Restricted share units
Number of Shares
Restricted shares outstanding at end of fiscal year	22,100
Weighted-average grant date fair value
Restricted shares granted (in dollars per share)	$ 71
Long-Term Stock Incentive Plan
Shareholders Equity
Share awards available for issuance	800,000
Additional grants available under the previous plans (in shares)	0
Long-Term Stock Incentive Plan \| Restricted share
Number of Shares
Restricted shares outstanding at beginning of fiscal year	211,045	228,682	175,886
Restricted shares granted	49,726	58,753	44,437
Restricted shares vested, including restricted shares repurchased from employees for employees' tax liability	(73,408)	(92,239)	(58,711)
Restricted shares forfeited	(1,900)	(14,594)	(19,939)
Restricted shares outstanding at end of fiscal year	257,890	211,045	228,682
Weighted-average grant date fair value
Restricted shares outstanding at beginning of fiscal year (in dollars per share)	$ 63	$ 69	$ 67
Restricted shares granted (in dollars per share)	79	56	73
Restricted shares vested, including restricted shares repurchased from employees for employees' tax liability (in dollars per share)	58	78	51
Restricted shares forfeited (in dollars per share)	62	58	67
Restricted shares outstanding at end of fiscal year (in dollars per share)	$ 66	$ 63	$ 69
Long-Term Stock Incentive Plan \| Restricted share \| Minimum
Shareholders Equity
Vesting period	3 years
Long-Term Stock Incentive Plan \| Restricted share \| Maximum
Shareholders Equity
Vesting period	4 years
Long-Term Stock Incentive Plan \| Restricted share units
Number of Shares
Restricted shares granted	72,427	30,443	87,009
Weighted-average grant date fair value
Restricted shares granted (in dollars per share)	$ 57	$ 76	$ 58

Represents the additional number of shares available for grant under the plan.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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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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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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