Notes Payable and Long-Term Debt - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Debt Instrument [Line Items]
Interest expense	$ 146,079	$ 104,064	$ 137,442
Long-term Debt, Fair Value	1,800,000	2,100,000
Notes payable	1,152,457	306,831
Long-term Debt	1,784,529
Capitalized Interest	(32,200)	(25,700)	$ (14,000)
Long-term debt repaid	331,600	366,100
Loan, Securitized or Asset-Backed Financing Arrangement, Principal Outstanding	$ 802,600
Unsecured debt | Minimum
Debt Instrument [Line Items]
Interest rate	3.90%
Unsecured debt | Maximum
Debt Instrument [Line Items]
Interest rate	9.00%
Five-year revolving facilities | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 180,000	0
Debt Instrument, Term	5 years
Line of Credit Facility, Current Borrowing Capacity	$ 2,800,000
Other international subsidiaries, lines of credit | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	329,500	162,700
Repurchase Facility [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	250,000
Line of Credit Facility, Fair Value of Amount Outstanding	159,700	0
Notes Payable, Other Payables [Member] | Notes Payable, Other Payables [Member] | Revolving credit facility
Debt Instrument [Line Items]
Notes payable	584,226	163,136
Recourse loan commitments | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Short-term bank loans and notes payable current borrowing capacity	100,000
Notes payable	0
Short-Term Notes Payable, Surplus Funds Program [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Notes payable	112,500	143,700
Committed Member
Debt Instrument [Line Items]
maximum availability under securitization	850,000
Uncommitted Member
Debt Instrument [Line Items]
maximum availability under securitization	$ 250,000
Additional Private placement, payable in its entirety in 2030 | Unsecured debt
Debt Instrument [Line Items]
Interest rate	5.68%
Debt Instrument, Face Amount	$ 150,000
Long-term Debt	150,000	150,000
Unsecured term loans
Debt Instrument [Line Items]
Long-term Debt	0	1,000
Unsecured term loans | Outstanding Debt Balance
Debt Instrument [Line Items]
Long-term Debt	0
loan amount utilized
Debt Instrument [Line Items]
Loan, Held-in-Portfolio, Principal Outstanding	$ 296,000	$ 0