Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 107,655	$ 132,116	$ (38,249)
Deferred Tax Liabilities, Net	122,453	139,019
Income (Loss) from Continuing Operations before Income Taxes, Domestic	2,000,000	1,800,000	497,500
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 55,400	$ (4,900)	$ 17,800
Statutory federal income tax rate	21.00%	21.00%	21.00%
Operating Loss Carryforwards	$ 587,300
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	344,400
Amount of unrecognized tax benefits that would benefit effective tax rate	116,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	800	$ 700	$ 1,400
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	3,700	3,300
State tax credit
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	116,600
NCRA | State tax credit
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	$ 116,600	$ 122,800