Restructuring - Restructuring Reserve Roll Forward (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Restructuring Reserve [Roll Forward]
Beginning balance	$ 4,995	$ 14,206	$ 9,075
Restructuring charges	16,821	15,012	26,046
Restructuring Charges in Discontinued Operations	241	6,989	4,549
Non-cash write-offs	(4,164)	(566)	(4,487)
Cash payments	(14,377)	(30,646)	(20,977)
Ending balance	3,516	4,995	14,206
Employee Severance
Restructuring Reserve [Roll Forward]
Beginning balance	3,389	11,475	8,809
Restructuring charges	5,465	9,328	18,350
Restructuring Charges in Discontinued Operations	0	6,615	2,811
Non-cash write-offs	0	0	0
Cash payments	(7,696)	(24,029)	(18,495)
Ending balance	1,158	3,389	11,475
Asset Write Offs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0	0
Restructuring charges	4,168	267	4,125
Restructuring Charges in Discontinued Operations	(4)	299	362
Non-cash write-offs	(4,164)	(566)	(4,487)
Cash payments	0	0	0
Ending balance	0	0	0
Other Restructuring Cost
Restructuring Reserve [Roll Forward]
Beginning balance	1,606	2,731	266
Restructuring charges	7,188	5,417	3,571
Restructuring Charges in Discontinued Operations	245	75	1,376
Non-cash write-offs	0	0	0
Cash payments	(6,681)	(6,617)	(2,482)
Ending balance	$ 2,358	$ 1,606	$ 2,731