CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Treasury stock	Noncontrolling interests
Beginning Balance at Aug. 31, 2019	$ 1,900,758	$ 260	$ 2,304,552	$ 2,037,037	$ (82,794)	$ (2,371,612)	$ 13,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	16,179
Vesting of restricted stock		2	(2)
Purchase of noncontrolling interest			0				0
Recognition of stock-based compensation			59,365
Declared dividends				(37,672)
Net income (loss)	(12,130)			(13,819)			1,689
Other comprehensive income (loss)	(66,609)				(66,609)
Purchases of treasury stock under employee stock plans						(23,086)
Treasury shares purchased						(189,500)
Declared dividends to noncontrolling interests							(2,002)
Ending Balance at May. 31, 2020	1,645,304	263	2,380,094	1,985,546	(149,403)	(2,584,198)	13,002
Beginning Balance at Feb. 29, 2020	1,759,140	263	2,363,839	2,048,954	(102,943)	(2,563,282)	12,309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		0	0
Vesting of restricted stock		0	0
Purchase of noncontrolling interest			0				0
Recognition of stock-based compensation			16,255
Declared dividends				(12,450)
Net income (loss)	(50,263)			(50,958)			695
Other comprehensive income (loss)	(46,460)				(46,460)
Purchases of treasury stock under employee stock plans						(75)
Treasury shares purchased						(20,841)
Declared dividends to noncontrolling interests							(2)
Ending Balance at May. 31, 2020	1,645,304	263	2,380,094	1,985,546	(149,403)	(2,584,198)	13,002
Beginning Balance at Aug. 31, 2020	1,825,399	264	2,413,616	2,040,922	(34,168)	(2,609,250)	14,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		1	20,354
Vesting of restricted stock		2	(2)
Purchase of noncontrolling interest			(13,869)				(12,370)
Recognition of stock-based compensation			70,793
Declared dividends				(37,175)
Net income (loss)	523,379			521,576			1,803
Other comprehensive income (loss)	48,890				48,890
Purchases of treasury stock under employee stock plans						(22,155)
Treasury shares purchased						(261,788)
Declared dividends to noncontrolling interests							(2,499)
Ending Balance at May. 31, 2021	2,138,960	267	2,490,892	2,525,323	14,722	(2,893,193)	949
Beginning Balance at Feb. 28, 2021	2,101,942	267	2,488,366	2,368,012	(4,270)	(2,763,214)	12,781
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee stock purchase plan		0	0
Vesting of restricted stock		0	0
Purchase of noncontrolling interest			(13,869)				(12,370)
Recognition of stock-based compensation			16,395
Declared dividends				(12,169)
Net income (loss)	170,018			169,480			538
Other comprehensive income (loss)	18,992				18,992
Purchases of treasury stock under employee stock plans						(187)
Treasury shares purchased						(129,792)
Declared dividends to noncontrolling interests							0
Ending Balance at May. 31, 2021	$ 2,138,960	$ 267	$ 2,490,892	$ 2,525,323	$ 14,722	$ (2,893,193)	$ 949