ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Foreign currency translation
Beginning balance	$ (1,295,743)	$ (1,510,632)	$ (1,852,320)
Foreign currency translation	242,799	215,655	349,151
Income tax benefit (expense)	(750)	1,376	918
Portion attributable to noncontrolling interests	(6,368)	(2,142)	(8,381)
Foreign currency translation, net of tax	235,681	214,889	341,688
Ending balance	(1,060,062)	(1,295,743)	(1,510,632)
Defined benefit plans
Beginning balance	(254,172)	(226,503)	(348,771)
Actuarial gains (losses)	74,486	(67,860)	147,499
Pension settlement	(437)	(5,276)	(9,481)
Prior service costs arising during the period	0	(307)	11,888
Reclassifications into net periodic pension and post-retirement expense	16,981	26,080	34,634
Income tax benefit (expense)	(32,743)	19,668	(62,147)
Portion attributable to noncontrolling interests	(55)	26	(125)
Defined benefit plans, net of tax	58,232	(27,669)	122,268
Ending balance	(195,940)	(254,172)	(226,503)
Cash flow hedges
Beginning balance	(4,827)	(5,966)	10,749
Unrealized gain (loss)	(265,161)	22,139	(64,331)
Reclassification adjustments into Cost of services	10,165	(28,386)	27,865
Income tax benefit (expense)	50,254	7,387	19,734
Portion attributable to noncontrolling interests	192	(1)	17
Cash flow hedges, net of tax	(204,550)	1,139	(16,715)
Ending balance	(209,377)	(4,827)	(5,966)
Accumulated other comprehensive loss	(1,465,379)	$ (1,554,742)	$ (1,743,101)
Net unrealized losses related to derivatives designated as cash flow hedges expected to be reclassified in the next twelve months	$ 115,077