Long-Term Obligations and Commitments (Details)		3 Months Ended
	Feb. 01, 2016 USD ($)	Oct. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)	Jul. 31, 2016 USD ($)
Debt Instrument [Line Items]
Long-term debt		$ 475,000,000		$ 488,000,000
Long Term Obligations (Textuals)
Cash paid for interest on the Notes		14,000,000	$ 14,000,000
Other long-term obligations
Total deferred rent		54,000,000		56,000,000
Total license fee payable		27,000,000		26,000,000
Long-term income tax liabilities		54,000,000		54,000,000
Long-term deferred income tax liabilities		7,000,000		7,000,000
Other		19,000,000		20,000,000
Total long-term obligations		161,000,000		163,000,000
Less current portion (included in other current liabilities)		(17,000,000)		(17,000,000)
Long-term obligations due after one year		144,000,000		$ 146,000,000
Term Loan
Long Term Obligations (Textuals)
Cash paid for interest on the Notes		2,000,000
February 1, 2016 Credit Agreement
Long Term Obligations (Textuals)
Debt instrument, term	5 years
Master credit agreement	$ 1,500,000,000.0
February 1, 2016 Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Debt to EBITDA ratio (not greater than)	3.25
EBITDA to interest payable ratio (not less than)	3.00
Periodic principal payment percentage	2.50%
February 1, 2016 Credit Agreement | Line of Credit | Term Loan
Long Term Obligations (Textuals)
Unsecured term loan	$ 500,000,000	500,000,000
Long-term debt, current maturities		$ 25,000,000
Term loan, increase limit	500,000,000
February 1, 2016 Credit Agreement | Line of Credit | Revolving Credit Facility
Long Term Obligations (Textuals)
Unsecured revolving credit facility	$ 1,000,000,000
Base Rate | Minimum | February 1, 2016 Credit Agreement | Line of Credit | Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate	0.125%
Base Rate | Minimum | February 1, 2016 Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Base Rate | Maximum | February 1, 2016 Credit Agreement | Line of Credit | Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate	0.875%
Base Rate | Maximum | February 1, 2016 Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
LIBOR | Minimum | February 1, 2016 Credit Agreement | Line of Credit | Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
LIBOR | Minimum | February 1, 2016 Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	0.90%
LIBOR | Maximum | February 1, 2016 Credit Agreement | Line of Credit | Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate	1.875%
LIBOR | Maximum | February 1, 2016 Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%