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Differences Between the Statutory U.S. Federal Income Tax Rate and the Company's Effective Tax Rate (Detail)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Expected provision at statutory U.S. federal tax rate	21.00%	33.80%	35.00%
State and local income taxes, net of federal tax benefit	3.90%	2.30%	3.10%
Foreign taxes	(1.50%)	(3.40%)	(2.90%)
Net impact of U.S. tax reform	0.30%	24.70%
Other	(1.00%)	1.20%	0.30%
Effective tax rate	22.70%	58.60%	35.50%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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