Restructuring Charges and Other Exit-Related Costs Restructuring Reserve Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Restructuring Reserve [Roll Forward]
Charges	$ 3,232	$ 2,019	$ 5,128	$ 2,642
Total charges to date	21,512		21,512
Total expected charges	21,971		21,971
All Other Plans
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			362
Charges	35	1,307	125	1,930
Payments and Other			(388)
Restructuring reserve, ending balance	99		99
Total charges to date	7,886		7,886
Total expected charges	7,941		7,941
Q2’15 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			2,546
Charges	3,197	712	5,003	712
Payments and Other			(2,763)
Restructuring reserve, ending balance	4,786		4,786
Total charges to date	13,626		13,626
Total expected charges	14,030		14,030
Severance costs
Restructuring Reserve [Roll Forward]
Charges	3,185	911	4,346	938
Total charges to date	14,582		14,582
Total expected charges	14,646		14,646
Severance costs | All Other Plans
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	0	371	0	398
Payments and Other			0
Restructuring reserve, ending balance	0		0
Severance costs | Q2’15 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			1,226
Charges	3,185	540	4,346	540
Payments and Other			(2,061)
Restructuring reserve, ending balance	3,511		3,511
Contract termination costs
Restructuring Reserve [Roll Forward]
Charges	47	135	782	388
Total charges to date	3,248		3,248
Total expected charges	3,643		3,643
Contract termination costs | All Other Plans
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			362
Charges	35	56	125	309
Payments and Other			(388)
Restructuring reserve, ending balance	99		99
Contract termination costs | Q2’15 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			1,320
Charges	12	79	657	79
Payments and Other			(702)
Restructuring reserve, ending balance	1,275		1,275
Other restructuring costs
Restructuring Reserve [Roll Forward]
Charges	0	973	0	1,316
Total charges to date	3,682		3,682
Total expected charges	3,682		3,682
Other restructuring costs | All Other Plans
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	0	880	0	1,223
Payments and Other			0
Restructuring reserve, ending balance	0		0
Other restructuring costs | Q2’15 Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0
Charges	0	$ 93	0	$ 93
Payments and Other			0
Restructuring reserve, ending balance	$ 0		$ 0