Current Liabilities Textuals.

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- Definition

Debt Instrument, Covenant, Debt To EBITDA Ratio, Maximum

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Debt Instrument, Covenant, EBITDA To Annual Interest Expense Ratio, Minimum

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Debt Instrument, Maturity Date Extension

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- Definition

Line Of Credit Facility, Increase Limit

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Line of Credit Facility, Face Amount

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- Definition

Master Credit Agreement Amount

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 55
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The amount of cash paid for interest during the period.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Current Liabilities (Details)		3 Months Ended	9 Months Ended
Current Liabilities (Details)	Feb. 01, 2016 USD ($)	Apr. 30, 2016 USD ($)	Apr. 30, 2016 USD ($)	Apr. 30, 2015 USD ($)	Mar. 12, 2007 USD ($)
Debt Instrument [Line Items]
Cash paid for interest on the Notes			$ 29,000,000	$ 29,000,000
Current Liabilities (Textuals)
Borrowings from lines of credit			995,000,000	0
Repayments of lines of credit			$ 995,000,000	$ 0
Revolving Credit Facility \| Unsecured Debt
Debt Instrument [Line Items]
Long-term line of credit	$ 745,000,000
Term Loan
Debt Instrument [Line Items]
Cash paid for interest on the Notes		$ 1,000,000
5.75 percent fixed-rate notes due 2017
Debt Instrument [Line Items]
Senior notes					$ 500,000,000
Interest rate stated percentage					5.75%
Current Liabilities (Textuals)
Term loan					$ 500,000,000
February 1, 2016 Credit Agreement
Debt Instrument [Line Items]
Debt instrument, term	5 years
Current Liabilities (Textuals)
Master credit agreement	$ 1,500,000,000.0
February 1, 2016 Credit Agreement \| Line of Credit
Current Liabilities (Textuals)
Debt to EBITDA ratio (not greater than)	3.25
EBITDA to interest payable ratio (not less than)	3.00
February 1, 2016 Credit Agreement \| Revolving Credit Facility \| Line of Credit
Current Liabilities (Textuals)
Unsecured revolving credit facility	$ 1,000,000,000
Revolving credit facility, increase limit	$ 250,000,000
Unsecured revolving credit facility extension	2
Borrowings from lines of credit		250,000,000
Repayments of lines of credit		$ (250,000,000)
February 1, 2016 Credit Agreement \| Term Loan \| Line of Credit
Debt Instrument [Line Items]
Senior notes	$ 500,000,000
Current Liabilities (Textuals)
Term loan	$ 500,000,000
Base Rate \| February 1, 2016 Credit Agreement \| Revolving Credit Facility \| Line of Credit \| Minimum
Current Liabilities (Textuals)
Basis spread on variable rate	0.00%
Base Rate \| February 1, 2016 Credit Agreement \| Revolving Credit Facility \| Line of Credit \| Maximum
Current Liabilities (Textuals)
Basis spread on variable rate	0.50%
Base Rate \| February 1, 2016 Credit Agreement \| Term Loan \| Line of Credit \| Minimum
Current Liabilities (Textuals)
Basis spread on variable rate	0.125%
Base Rate \| February 1, 2016 Credit Agreement \| Term Loan \| Line of Credit \| Maximum
Current Liabilities (Textuals)
Basis spread on variable rate	0.875%
LIBOR \| February 1, 2016 Credit Agreement \| Revolving Credit Facility \| Line of Credit \| Minimum
Current Liabilities (Textuals)
Basis spread on variable rate	0.90%
LIBOR \| February 1, 2016 Credit Agreement \| Revolving Credit Facility \| Line of Credit \| Maximum
Current Liabilities (Textuals)
Basis spread on variable rate	1.50%
LIBOR \| February 1, 2016 Credit Agreement \| Term Loan \| Line of Credit \| Minimum
Current Liabilities (Textuals)
Basis spread on variable rate	1.125%
LIBOR \| February 1, 2016 Credit Agreement \| Term Loan \| Line of Credit \| Maximum
Current Liabilities (Textuals)
Basis spread on variable rate	1.875%