Equities Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2022	Nov. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 9,461,266	$ 9,017,326
Other comprehensive income, net of tax	(13,618)	(15,418)
Ending Balance	9,728,845	9,249,926
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(168,640)	(141,385)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(66)	(83)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	5,560	5,064
Other Comprehensive Income (Loss), before Tax	5,494	4,981
Other Comprehensive Income (Loss), Tax	3,030	(1,213)
Other comprehensive income, net of tax	8,524	3,768
Ending Balance	(160,116)	(137,617)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	8,843	4,824
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(33,899)	870
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	7,229	(12,954)
Other Comprehensive Income (Loss), before Tax	(26,670)	(12,084)
Other Comprehensive Income (Loss), Tax	6,463	2,943
Other comprehensive income, net of tax	(20,207)	(9,141)
Ending Balance	(11,364)	(4,317)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(95,538)	(79,830)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(2,227)	(9,983)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0
Other Comprehensive Income (Loss), before Tax	(2,227)	(9,983)
Other Comprehensive Income (Loss), Tax	292	(62)
Other comprehensive income, net of tax	(1,935)	(10,045)
Ending Balance	(97,473)	(89,875)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(255,335)	(216,391)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(36,192)	(9,196)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	12,789	(7,890)
Other Comprehensive Income (Loss), before Tax	(23,403)	(17,086)
Other Comprehensive Income (Loss), Tax	9,785	1,668
Other comprehensive income, net of tax	(13,618)	(15,418)
Ending Balance	$ (268,953)	$ (231,809)