Restructuring and Related Charges (Liability Activity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Restructuring Reserve [Roll Forward]
Restructuring related charges	$ 29,604	$ 817	$ 74,855	$ 6,842
Employee Severance and Benefit Costs
Restructuring Reserve [Roll Forward]
Restructuring related charges	8,012	3,768	26,793	8,947
Lease Costs
Restructuring Reserve [Roll Forward]
Restructuring related charges	6,229	0	6,468	9
Asset Write-off Costs
Restructuring Reserve [Roll Forward]
Restructuring related charges	9,109	$ (3,396)	25,425	$ (3,212)
2020 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			5,931
Restructuring related charges			59,136
Asset write-off charge and other non-cash activity			(31,155)
Cash payments			(17,270)
Balance as of end of period	16,642		16,642
2020 Restructuring Plan | Employee Severance and Benefit Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			3,162
Restructuring related charges			26,793
Asset write-off charge and other non-cash activity			(95)
Cash payments			(16,415)
Balance as of end of period	13,445		13,445
2020 Restructuring Plan | Lease Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			1,980
Restructuring related charges			6,468
Asset write-off charge and other non-cash activity			(5,637)
Cash payments			(278)
Balance as of end of period	2,533		2,533
2020 Restructuring Plan | Asset Write-off Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			0
Restructuring related charges			25,425
Asset write-off charge and other non-cash activity			(25,425)
Cash payments			0
Balance as of end of period	0		0
2020 Restructuring Plan | Other Related Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			789
Restructuring related charges			450
Asset write-off charge and other non-cash activity			2
Cash payments			(577)
Balance as of end of period	$ 664		$ 664