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Weighted Average Assumptions Used to Estimate Fair Value of Stock Option (Detail)	9 Months Ended
	Oct. 30, 2021 $ / shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate, minimum	0.45%
Risk-free interest rate, maximum	1.13%
Expected volatility, minimum	34.00%
Expected volatility, maximum	35.00%
Expected life (years), minimum	6 years
Expected life (years), maximum	6 years 3 months
Contractual life (years)	10 years
Expected dividend yield	0.00%
Weighted average grant date fair value of options issued	$ 110.12

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- Definition

Share based compensation arrangement by share based payment award fair value assumptions contractual life.

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Sharebased compensation arrangement by sharebased payment award fair value assumptions expected term, maximum.

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Sharebased compensation arrangement by sharebased payment award fair value assumptions expected term minimum.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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 (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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 (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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