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Equities Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2021 | Feb. 28, 2021 | Nov. 30, 2020 | May 31, 2020 | Feb. 29, 2020 | Nov. 30, 2019 | May 31, 2021 | May 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning Balance | $ 8,719,783 | $ 8,785,856 | $ 8,819,173 | $ 8,623,956 | $ 8,622,916 | $ 8,617,530 | $ 8,819,173 | $ 8,617,530
Other comprehensive income (loss), net of tax | 7,115 | 2,549 | 8,917 | (2,009) | (10,585) | (1,638) | 18,581 | (14,232)
Ending Balance | 8,951,193 | 8,719,783 | 8,785,856 | 8,780,286 | 8,623,956 | 8,622,916 | 8,951,193 | 8,780,286
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning Balance | (152,166) | (156,035) | (159,680) | (163,659) | (167,405) | (172,478) | (159,680) | (172,478)
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 112 | 0 | (125) | (340) | 0 | (85) |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 5,064 | 5,151 | 4,977 | 4,977 | 4,977 | 4,977 |  |
Other Comprehensive Income (Loss), before Tax | 5,176 | 5,151 | 4,852 | 4,637 | 4,977 | 4,892 |  |
Other Comprehensive Income (Loss), Tax | (1,288) | (1,282) | (1,207) | (1,147) | (1,231) | 181 |  |
Other comprehensive income (loss), net of tax | 3,888 | 3,869 | 3,645 | 3,490 | 3,746 | 5,073 |  |
Ending Balance | (148,278) | (152,166) | (156,035) | (160,169) | (163,659) | (167,405) | (148,278) | (160,169)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning Balance | 11,996 | 12,555 | 10,886 | 3,613 | 9,425 | 15,297 | 10,886 | 15,297
Other Comprehensive Income (Loss), before Reclassifications, before Tax | (4,725) | 2,929 | 14,506 | 7,795 | (5,975) | (3,331) |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | (1,919) | (3,673) | (12,284) | 1,263 | (1,747) | (4,473) |  |
Other Comprehensive Income (Loss), before Tax | (6,644) | (744) | 2,222 | 9,058 | (7,722) | (7,804) |  |
Other Comprehensive Income (Loss), Tax | 1,653 | 185 | (553) | (2,241) | 1,910 | 1,932 |  |
Other comprehensive income (loss), net of tax | (4,991) | (559) | 1,669 | 6,817 | (5,812) | (5,872) |  |
Ending Balance | 7,005 | 11,996 | 12,555 | 10,430 | 3,613 | 9,425 | 7,005 | 10,430
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning Balance | (82,288) | (81,527) | (85,130) | (79,110) | (70,591) | (69,752) | (85,130) | (69,752)
Other Comprehensive Income (Loss), before Reclassifications, before Tax |  | (587) | 3,629 | (12,515) | (8,540) | (2,411) |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 8,398 | 0 | 0 | 0 | 0 | 0 |  |
Other Comprehensive Income (Loss), before Tax | 8,398 | (587) | 3,629 | (12,515) | (8,540) | (2,411) |  |
Other Comprehensive Income (Loss), Tax | (180) | (174) | (26) | 199 | 21 | 1,572 |  |
Other comprehensive income (loss), net of tax | 8,218 | (761) | 3,603 | (12,316) | (8,519) | (839) |  |
Ending Balance | (74,070) | (82,288) | (81,527) | (91,426) | (79,110) | (70,591) | (74,070) | (91,426)
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |
Beginning Balance | (222,458) | (225,007) | (233,924) | (239,156) | (228,571) | (226,933) | (233,924) | (226,933)
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 3,785 | 2,342 | 18,010 | (5,060) | (14,515) | (5,827) |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 3,145 | 1,478 | (7,307) | 6,240 | 3,230 | 504 |  |
Other Comprehensive Income (Loss), before Tax | 6,930 | 3,820 | 10,703 | 1,180 | (11,285) | (5,323) |  |
Other Comprehensive Income (Loss), Tax | 185 | (1,271) | (1,786) | (3,189) | 700 | 3,685 |  |
Other comprehensive income (loss), net of tax | 7,115 | 2,549 | 8,917 | (2,009) | (10,585) | (1,638) |  |
Ending Balance | $ (215,343) | $ (222,458) | $ (225,007) | $ (241,165) | $ (239,156) | $ (228,571) | $ (215,343) | $ (241,165)

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