Equities Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 10,767,563	$ 9,829,319	$ 10,452,389	$ 9,461,266
Other Comprehensive Income (Loss), Net of Tax	(3,592)	(3,108)	(5,466)	(4,936)
Ending Balance	10,914,317	10,083,378	10,914,317	10,083,378
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(173,857)	(164,089)	(173,925)	(168,640)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	20	148	20	351
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	45	23	135	70
Other Comprehensive Income (Loss), before Tax	65	171	155	421
Other Comprehensive Income (Loss), Tax	(16)	(41)	(38)	4,260
Other Comprehensive Income (Loss), Net of Tax	49	130	117	4,681
Ending Balance	(173,808)	(163,959)	(173,808)	(163,959)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	4,174	3,779	2,032	8,843
Other Comprehensive Income (Loss), before Reclassifications, before Tax	2,209	(1,051)	15,130	(24,392)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(3,111)	(2,289)	(13,195)	14,368
Other Comprehensive Income (Loss), before Tax	(902)	(3,340)	1,935	(10,024)
Other Comprehensive Income (Loss), Tax	221	809	(474)	2,429
Other Comprehensive Income (Loss), Net of Tax	(681)	(2,531)	1,461	(7,595)
Ending Balance	3,493	1,248	3,493	1,248
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(97,586)	(96,853)	(93,502)	(95,538)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(3,104)	(800)	(7,206)	(2,288)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0
Other Comprehensive Income (Loss), before Tax	(3,104)	(800)	(7,206)	(2,288)
Other Comprehensive Income (Loss), Tax	144	93	162	266
Other Comprehensive Income (Loss), Net of Tax	(2,960)	(707)	(7,044)	(2,022)
Ending Balance	(100,546)	(97,560)	(100,546)	(97,560)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(267,269)	(257,163)	(265,395)	(255,335)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(875)	(1,703)	7,944	(26,329)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(3,066)	(2,266)	(13,060)	14,438
Other Comprehensive Income (Loss), before Tax	(3,941)	(3,969)	(5,116)	(11,891)
Other Comprehensive Income (Loss), Tax	349	861	(350)	6,955
Other Comprehensive Income (Loss), Net of Tax	(3,592)	(3,108)	(5,466)	(4,936)
Ending Balance	$ (270,861)	$ (260,271)	$ (270,861)	$ (260,271)