SEGMENT REPORTING - Company's Reportable Operating Segments (Details) $ in Thousands		3 Months Ended								12 Months Ended
		Aug. 31, 2017 USD ($)	May 31, 2017 USD ($)	Feb. 28, 2017 USD ($)	Nov. 30, 2016 USD ($)	Aug. 31, 2016 USD ($)	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Nov. 30, 2015 USD ($)	Aug. 31, 2017 USD ($)	Aug. 31, 2016 USD ($)	Aug. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments										5
Net revenues		$ 9,149,958	$ 8,867,036	$ 8,317,671	$ 8,515,517	$ 8,489,238	$ 8,434,757	$ 7,945,565	$ 8,013,163	$ 34,850,182	$ 32,882,723	$ 31,047,931
Depreciation and amortization	[1]									801,789	729,052	645,923
Operating income		1,296,562	$ 865,435	$ 1,138,653	$ 1,331,959	1,195,198	$ 1,305,943	$ 1,088,044	$ 1,221,260	4,632,609	4,810,445	4,435,869
Net Assets	[2]	4,349,298				3,904,223				4,349,298	3,904,223	3,620,335
Communications, Media & Technology
Segment Reporting Information [Line Items]
Net revenues										6,884,738	6,615,717	6,349,372
Depreciation and amortization	[1]									148,690	141,356	152,329
Operating income										1,048,786	965,574	883,935
Net Assets	[2]	916,325				923,764				916,325	923,764	798,623
Financial Services
Segment Reporting Information [Line Items]
Net revenues										7,393,945	7,031,053	6,634,771
Depreciation and amortization	[1]									147,343	139,518	128,413
Operating income										1,207,391	1,127,750	1,092,857
Net Assets	[2]	155,386				123,827				155,386	123,827	186,739
Health & Public Service
Segment Reporting Information [Line Items]
Net revenues										6,177,846	5,986,878	5,462,550
Depreciation and amortization	[1]									143,659	134,788	115,010
Operating income										772,785	807,012	712,624
Net Assets	[2]	911,605				892,569				911,605	892,569	812,278
Products
Segment Reporting Information [Line Items]
Net revenues										9,500,451	8,395,038	7,596,051
Depreciation and amortization	[1]									228,400	206,806	168,731
Operating income										1,558,680	1,282,461	1,098,174
Net Assets	[2]	1,299,898				1,281,551				1,299,898	1,281,551	1,158,953
Resources
Segment Reporting Information [Line Items]
Net revenues										4,847,073	4,838,963	4,988,627
Depreciation and amortization	[1]									133,697	106,584	81,440
Operating income										554,760	627,648	712,661
Net Assets	[2]	953,820				820,273				953,820	820,273	723,113
Other
Segment Reporting Information [Line Items]
Net revenues										46,129	15,074	16,560
Depreciation and amortization	[1]									0	0	0
Operating income										(509,793)	0	(64,382)
Net Assets	[2]	$ 112,264				$ (137,761)				$ 112,264	$ (137,761)	$ (59,371)

[1] Amounts include depreciation on property and equipment and amortization of intangible assets controlled by each operating segment, as well as an allocation for amounts they do not directly control.

[2] The Company does not allocate total assets by operating segment. Operating segment assets directly attributed to an operating segment and provided to the chief operating decision maker include receivables from clients, current and non-current unbilled services, deferred contract costs and current and non-current deferred revenues.