Concentration of Risk and Segment Data (Segment Income) (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Reconciling items:
Amortization of intangibles	$ 8,766	$ 8,599	$ 17,088	$ 16,439
Stock-based compensation expense and related charges	15,318	20,268	15,027	45,060
Restructuring and related charges	44,927	2,535	80,829	3,888
Other expense	3,371	2,167	8,051	3,933
Interest income	(2,289)	(2,287)	(4,744)	(4,351)
Interest expense	33,800	34,262	66,644	67,297
Income before income tax	48,301	120,787	178,839	302,554
EMS [Member]
Reconciling items:
Income before income tax	98,089	84,692	187,635	167,957
DMS [Member]
Reconciling items:
Income before income tax	54,105	101,639	174,099	266,863
Operating Segments [Member]
Reconciling items:
Income before income tax	$ 152,194	$ 186,331	$ 361,734	$ 434,820