Common stock transactions (Detail) (USD $) Share data in Thousands, unless otherwise specified	12 Months Ended
	Jan. 30, 2015	Jan. 31, 2014	Feb. 01, 2013
Common stock transactions
Aggregate purchase price	$ 800,095,000	$ 620,052,000	$ 671,459,000
Common Stock
Common stock transactions
Shares acquired under share repurchase program	14,106	11,037	14,394
Aggregate purchase price	12,342,000	9,657,000	12,595,000
Common Stock | Pursuant to Authorized Repurchase Program
Common stock transactions
Common stock repurchase authorization	2,000,000,000
Remaining authorization available under the common stock repurchase program	223,400,000
Shares acquired under share repurchase program	14,100	11,000	14,400
Aggregate purchase price	$ 800,100,000	$ 620,100,000	$ 671,400,000