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Benefit Plans - Schedule of Pension Plans' Fair Value Measurements (Details) - USD ($)
$ in Thousands
Aug. 31, 2025
Aug. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value $ 776,286 $ 781,412
Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 40,786 12,416
Equity Securities: Common/collective trust [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 172,659 156,462
Fixed Income Securities: Common/collective trust [Member] [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 426,785 464,611
Fixed Income Securities    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 113,764 125,061
Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 22,292 22,862
Fair Value, Inputs, Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 3 | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 3 | Equity Securities: Common/collective trust [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 3 | Fixed Income Securities: Common/collective trust [Member] [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 3 | Fixed Income Securities    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 3 | Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 68,865 43,714
Fair Value, Inputs, Level 1 | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 40,786 12,416
Fair Value, Inputs, Level 1 | Equity Securities: Common/collective trust [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 1 | Fixed Income Securities: Common/collective trust [Member] [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 1 | Fixed Income Securities    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 28,079 31,298
Fair Value, Inputs, Level 1 | Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 85,685 93,763
Fair Value, Inputs, Level 2 | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 2 | Equity Securities: Common/collective trust [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 2 | Fixed Income Securities: Common/collective trust [Member] [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 2 | Fixed Income Securities    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 85,685 93,763
Fair Value, Inputs, Level 2 | Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value $ 0 $ 0