Business Segments - Summary of Sales by Merchandise Category Related to Retail Trade and Electronic Commerce Trade Segments (Detail)	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Revenue from External Customer [Line Items]
Percentage of total net sales	100.00%	100.00%	100.00%	100.00%
Books and magazines [Member]
Revenue from External Customer [Line Items]
Percentage of total net sales	69.50%	70.80%	69.30%	71.20%
General Merchandise [Member]
Revenue from External Customer [Line Items]
Percentage of total net sales	14.20%	13.00%	14.50%	12.80%
Cafe and yogurt [Member]
Revenue from External Customer [Line Items]
Percentage of total net sales	5.90%	5.70%	5.70%	5.70%
Electronics, eBooks and Accessories [Member]
Revenue from External Customer [Line Items]
Percentage of total net sales	1.00%	1.20%	1.10%	1.30%
Media [Member]
Revenue from External Customer [Line Items]
Percentage of total net sales	4.60%	4.80%	4.80%	4.40%
Other [Member]
Revenue from External Customer [Line Items]
Percentage of total net sales	4.80%	4.50%	4.60%	4.60%