Debt Issuance - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 28, 2015	Jan. 30, 2016	Aug. 01, 2015	Jan. 30, 2016	Jun. 16, 2015	Apr. 25, 2015
Line of Credit Facility [Line Items]
Initial borrowed amount						$ 0
Borrowings on revolving credit		$ 198,000,000		$ 198,000,000		$ 0
Credit Facility Expiring on December 2016 [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 300,000,000
Credit Agreement [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 1,500,000,000
Expiration date			Jun. 16, 2020
Credit Agreement [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread rate				1.25%
Credit Agreement [Member] | LIBOR [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread rate			1.125%
Credit Agreement [Member] | LIBOR [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread rate			2.00%
Credit Agreement [Member] | Unsecured Term Loan [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 1,000,000,000
Initial borrowed amount		321,750,000	1,000,000,000	$ 321,750,000
Amount repaid	$ 670,000,000
Debt issuance cost amortization	$ 5,153,000
Principal payment		$ 4,125,000		$ 8,250,000
Credit Agreement [Member] | Unsecured Revolving Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			500,000,000
Initial borrowed amount			$ 200,000,000