Current and long-term obligations (Detail) (USD $)	12 Months Ended		0 Months Ended	12 Months Ended	3 Months Ended	0 Months Ended
	Jan. 31, 2014	Feb. 01, 2013	Apr. 11, 2013	Jan. 30, 2015	May 03, 2013	Jul. 15, 2012	Jul. 12, 2012
Current and long-term obligations
Current and long-term obligations	$ 2,818,754,000			2,740,585,000
Less: current portion	(75,966,000)			(101,158,000)
Long-term portion	2,742,788,000			2,639,427,000
Letters of credit outstanding				43,600,000
Loss on debt retirement, net	18,871,000	30,620,000
Scheduled debt maturities including capital lease obligations
2015				101,158,000
2016				101,379,000
2017				601,290,000
2018				1,025,892,000
2019				1,020,000
Thereafter				912,131,000
Senior unsecured credit facilities, maturity April 11, 2018
Current and long-term obligations
Credit agreement term			5 years
Debt issue cost capitalized			5,900,000
Weighted average interest rate (as a percent)				1.46%
Senior unsecured credit facilities, maturity April 11, 2018 | LIBOR loans
Current and long-term obligations
Variable rate basis				LIBOR
Spread on variable rate (as a percent)				1.275%
Senior unsecured credit facilities, maturity April 11, 2018 | Base-rate loans
Current and long-term obligations
Variable rate basis				base-rate
Spread on variable rate (as a percent)				0.275%
Senior unsecured credit facility, maturity April 11, 2018, Term Facility
Current and long-term obligations
Current and long-term obligations	1,000,000,000			925,000,000
Amount borrowed			1,000,000,000
Amount of quarterly installments beginning August 1, 2014				25,000,000
Senior unsecured credit facility, maturity April 11, 2018, Revolving Facility
Current and long-term obligations
Maximum financing under credit agreements			850,000,000
Borrowing availability under credit facility				821,500,000
Senior unsecured credit facility, maturity April 11, 2018, Revolving Facility | Letters of credit
Current and long-term obligations
Maximum financing under credit agreements			250,000,000
Letters of credit outstanding				28,500,000
Previous Senior Secured Credit Facilities
Current and long-term obligations
Loss on debt retirement, net					18,900,000
Senior notes
Current and long-term obligations
Redemption price as a percentage of principal amount				101.00%
4.125% Senior Notes due July 15, 2017
Current and long-term obligations
Current and long-term obligations	500,000,000			500,000,000
Amount borrowed							500,000,000
Stated interest rate (as a percent)	4.125%			4.125%			4.125%
1.875% Senior Notes due April 15, 2018
Current and long-term obligations
Current and long-term obligations	399,617,000			399,706,000
Discount on debt issuance	383,000		500,000	294,000
Amount borrowed			400,000,000
Stated interest rate (as a percent)	1.875%		1.875%	1.875%
3.25% Senior Notes due April 15, 2023
Current and long-term obligations
Current and long-term obligations	897,801,000			898,009,000
Discount on debt issuance	2,199,000		2,400,000	1,991,000
Amount borrowed			900,000,000
Stated interest rate (as a percent)	3.25%		3.25%	3.25%
2018 and 2023 Senior Notes
Current and long-term obligations
Debt issue cost capitalized			10,100,000
Capital lease obligations
Current and long-term obligations
Current and long-term obligations	6,841,000			5,875,000
Tax increment financing due February 1, 2035
Current and long-term obligations
Current and long-term obligations	14,495,000			11,995,000
Senior Subordinated Notes due July 2017
Current and long-term obligations
Principal amount of notes repurchased						450,700,000
Loss on debt retirement, net		$ 29,000,000