SPECIAL ITEMS (Details 3) (Water Operations, USD $) In Millions, unless otherwise specified	3 Months Ended
Oct. 31, 2012
Water Operations
Goodwill Impairment
Non-cash charge in cost of sales for the impairment of goodwill, pretax	$ 33
Non-cash charge in cost of sales for the impairment of goodwill, after-tax	$ 31

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

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-Subparagraph (b)

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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

-Publisher FASB

-Name Accounting Standards Codification

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

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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