Equities Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 9,017,326	$ 8,819,173
Other comprehensive income, net of tax	(15,418)	8,917
Ending Balance	9,249,926	8,785,856
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(141,385)	(159,680)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(83)	(125)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	5,064	4,977
Other Comprehensive Income (Loss), before Tax	4,981	4,852
Other Comprehensive Income (Loss), Tax	(1,213)	(1,207)
Other comprehensive income, net of tax	3,768	3,645
Ending Balance	(137,617)	(156,035)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	4,824	10,886
Other Comprehensive Income (Loss), before Reclassifications, before Tax	870	14,506
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(12,954)	(12,284)
Other Comprehensive Income (Loss), before Tax	(12,084)	2,222
Other Comprehensive Income (Loss), Tax	2,943	(553)
Other comprehensive income, net of tax	(9,141)	1,669
Ending Balance	(4,317)	12,555
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(79,830)	(85,130)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(9,983)	3,629
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0
Other Comprehensive Income (Loss), before Tax	(9,983)	3,629
Other Comprehensive Income (Loss), Tax	(62)	(26)
Other comprehensive income, net of tax	(10,045)	3,603
Ending Balance	(89,875)	(81,527)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(216,391)	(233,924)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(9,196)	18,010
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(7,890)	(7,307)
Other Comprehensive Income (Loss), before Tax	(17,086)	10,703
Other Comprehensive Income (Loss), Tax	1,668	(1,786)
Other comprehensive income, net of tax	(15,418)	8,917
Ending Balance	$ (231,809)	$ (225,007)