Significant Components and Activity in Restructuring Plan (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Feb. 28, 2014	Feb. 28, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Related Charges	$ 32,203	$ 53,206
2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	6,097	0
Restructuring Related Charges	27,865	42,488
Asset Write off Charge and Other Non- Cash Activity	(22,348)	(22,848)
Cash Payments	(5,480)	(13,506)
Liability, Ending Balance	6,134	6,134
2014 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	4,773	0
Restructuring Related Charges	3,994	16,373
Asset Write off Charge and Other Non- Cash Activity		63
Cash Payments	(5,350)	(13,019)
Liability, Ending Balance	3,417	3,417
2014 Restructuring Plan | Lease Costs
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	0	0
Restructuring Related Charges	1,381	1,738
Cash Payments		(357)
Liability, Ending Balance	1,381	1,381
2014 Restructuring Plan | Asset Write Off Cost
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	0	0
Restructuring Related Charges	22,321	22,884
Asset Write off Charge and Other Non- Cash Activity	(22,321)	(22,884)
Liability, Ending Balance	0	0
2014 Restructuring Plan | Other Related Costs
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	1,324	0
Restructuring Related Charges	169	1,493
Asset Write off Charge and Other Non- Cash Activity	(27)	(27)
Cash Payments	(130)	(130)
Liability, Ending Balance	1,336	1,336
2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	57,795	55,439
Restructuring Related Charges	4,338	10,718
Asset Write off Charge and Other Non- Cash Activity	(1,471)	(83)
Cash Payments	(6,637)	(12,049)
Liability, Ending Balance	54,025	54,025
2013 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	57,740	55,188
Restructuring Related Charges	1,391	7,685
Asset Write off Charge and Other Non- Cash Activity	542	1,930
Cash Payments	(6,076)	(11,206)
Liability, Ending Balance	53,597	53,597
2013 Restructuring Plan | Lease Costs
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	0	251
Restructuring Related Charges	387	387
Cash Payments	(25)	(276)
Liability, Ending Balance	362	362
2013 Restructuring Plan | Asset Write Off Cost
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	0	0
Restructuring Related Charges	2,013	2,013
Asset Write off Charge and Other Non- Cash Activity	(2,013)	(2,013)
Liability, Ending Balance	0	0
2013 Restructuring Plan | Other Related Costs
Restructuring Cost and Reserve [Line Items]
Liability, Beginning Balance	55	0
Restructuring Related Charges	547	633
Cash Payments	(536)	(567)
Liability, Ending Balance	$ 66	$ 66