ASSETS AND LIABILITIES MEASURED AT FAIR VALUE (Details 2) (USD $) In Millions	Jul. 31, 2011
Contractual Maturities of Marketable Securities, Amortized Cost
Amortized cost, due in one year or less	$ 107
Amortized cost, due after one through five years	152
Amortized cost, due after five through 10 years	68
Amortized cost, due after 10 years	42
Amortized cost, residential mortgage-backed securities	74
Amortized cost, marketable securities	443
Contractual Maturities of Marketable Securities, Fair Value
Fair value, due in one year or less	107
Fair value, due after one through five years	155
Fair value, due after five through 10 years	74
Fair value, due after 10 years	44
Fair value, residential mortgage-backed securities	79
Fair value, marketable securities	$ 459

This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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