Discrete tax benefit due to changes in federal tax law.

No definition available.

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- Definition

Effective Income Tax Rate Reconciliation, Excluding Discrete Tax Benefits, Percent

+ References

No definition available.

+ Details

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- Definition

Unrecognized Tax Benefits, Net of Related Deferred Tax Assets

+ References

No definition available.

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(2))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Subparagraph 2

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 6.I)

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Apr. 30, 2015	Jan. 31, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014	Jul. 31, 2014
Income Tax Disclosure [Abstract]
Discrete Tax Benefit Due To Changes In Federal Tax Law		$ 11
Effective tax rate	44.00%		34.00%	48.00%	34.00%
Effective Income Tax Rate Reconciliation, Excluding Discrete Tax Benefits, Percent	36.00%			36.00%
Federal statutory income tax rate	35.00%		35.00%	35.00%	35.00%
Total amount of unrecognized tax benefits						40us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits, net of related deferred tax assets						26
Favorable net impact to income tax expense due to recognition of tax benefits						$ 26