Restructuring and Related Charges - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 817	$ 5,427	$ 6,842	$ 16,815
2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Total pre-tax restructuring and other related costs expected to be recognized	195,000		195,000
Restructuring related charges to date	187,100		187,100
EMS
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	300	2,100	4,700	8,000
DMS
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 500	$ 3,300	2,100	7,900
Corporate and Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges			$ 0	$ 900