Quarterly report pursuant to Section 13 or 15(d)

Goodwill and intangible assets (Detail) - Schedule Of Useful Lives For Acquisitions

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Goodwill and intangible assets (Detail) - Schedule Of Useful Lives For Acquisitions
9 Months Ended
Apr. 30, 2013
Minimum [Member] | Customer Relationships [Member]
 
Useful life assigned 8 years
Minimum [Member] | Other Intangible Assets [Member]
 
Useful life assigned 4 years
Maximum [Member] | Customer Relationships [Member]
 
Useful life assigned 15 years
Maximum [Member] | Other Intangible Assets [Member]
 
Useful life assigned 10 years
Customer Relationships [Member]
 
Weighted average remaining useful life 8 years
Trademarks [Member]
 
Useful life assigned 5 years
Weighted average remaining useful life 4 years
Other Intangible Assets [Member]
 
Weighted average remaining useful life 2 years