Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References+ Details

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.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (a)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 7, 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 7

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

+ Details

Cash and Cash Equivalents, Investments and Funds Held for Customers Type of issue (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Jul. 31, 2011
Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 1,412	$ 399	$ 393	$ 859	$ 277	$ 722
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	791		565
Available-for-sale Securities, Fair Value Disclosure	2,267		1,109
Total cash and cash equivalents investments and funds held for customers	2,234		1,079
Total cash and cash equivalents
Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents, at Carrying Value	1,421		508
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1,421		508
Available-for-sale debt securities [Member]
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	791		565
Available-for-sale Securities, Fair Value Disclosure	791		567
Municipal bonds
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	429		259
Available-for-sale Securities, Fair Value Disclosure	428		260
Municipal auction rate securities
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	33		41
Available-for-sale Securities, Fair Value Disclosure	33		41
Corporate notes
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	241		141
Available-for-sale Securities, Fair Value Disclosure	242		142
U.S. agency securities
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	88		124
Available-for-sale Securities, Fair Value Disclosure	88		124
Available-for-sale equity securities
Available-for-sale Securities [Abstract]
Available-for-sale Equity Securities, Amortized Cost Basis	5		5
Available-for-sale Securities, Fair Value Disclosure	38		33
Available-for-sale Securities, Gross Umrealized Gains	33
Other long-term investments [Member]
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Amortized Cost Basis	17		1
Available-for-sale Securities, Fair Value Disclosure	$ 17		$ 1