Restructuring - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Apr. 30, 2013	Jan. 31, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8,540	$ 1,947	$ 1,977	$ 10,487	$ 1,977
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				2,235
Americas [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5,067		1,709	6,534
Asia-Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			10	137
Emea [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,473		258	3,816
Asset Write-Off [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3,423		458	3,423
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,254		513
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,863		1,006	4,829
Asset Write Offs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				3,423
Low end of range [Member]
Restructuring Cost and Reserve [Line Items]
Percentage Reduction In Workforce Through Restructuring Programs	0.00%
Restructuring charges	13,000
High end of range [Member]
Restructuring Cost and Reserve [Line Items]
Percentage Reduction In Workforce Through Restructuring Programs	0.00%
Restructuring charges	$ 16,000