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Summary Of Significant Accounting Policies (Summary On Estimated Useful Life Of Property, Plant And Equipment) (Details)	12 Months Ended
	Jul. 31, 2011 years
Land Improvements [Member]
Minimum estimated life in years	10
Maximum estimated life in years	35
Buildings and Building Improvements [Member]
Minimum estimated life in years	7
Maximum estimated life in years	30
Machinery and Equipment [Member]
Minimum estimated life in years	2
Maximum estimated life in years	30
Furniture and Fixtures [Member]
Minimum estimated life in years	3
Maximum estimated life in years	10
Software [Member]
Estimated life in years	3
Vehicles [Member]
Minimum estimated life in years	3
Maximum estimated life in years	4

X

- Definition

The average useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeAverage
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration