Restructuring and Related Charges - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	May 31, 2013	May 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 28,392,000	$ 28,392,000
2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	28,392,000	28,392,000
Cash cost payment related to restructuring activities	(12,161,000)	(12,161,000)
Asset Write off Charge and Other Non-Cash Activity	5,857,000	5,857,000
Total pre-tax restructuring and other related costs expected to be recognized		188,000,000
2013 Restructuring Plan | Restructuring Charges Cash
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges		22,800,000
Total pre-tax restructuring and other related costs expected to be recognized		140,000,000
2013 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	22,719,000	22,719,000
Cash cost payment related to restructuring activities	(12,143,000)	(12,143,000)
Asset Write off Charge and Other Non-Cash Activity	246,000	246,000
2013 Restructuring Plan | Employee Severance | Restructuring Charges Cash
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges		22,700,000
2013 Restructuring Plan | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	5,673,000	5,673,000
Cash cost payment related to restructuring activities	(18,000)	(18,000)
Asset Write off Charge and Other Non-Cash Activity	5,611,000	5,611,000
2013 Restructuring Plan | Other Restructuring | Restructuring Charges Cash
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges		100,000
2013 Restructuring Plan | Restructuring Charges Noncash
Restructuring Cost and Reserve [Line Items]
Asset Write off Charge and Other Non-Cash Activity		$ 5,600,000