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Benefit Plans - Schedule of Pension Plans' Fair Value Measurements (Details) - USD ($)
$ in Thousands
Aug. 31, 2024
Aug. 31, 2023
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value $ 781,412 $ 736,150
Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 12,416 12,505
Equity Securities: Common/collective trust [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 156,462 127,225
Fixed Income Securities: Common/collective trust [Member] [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 464,611 425,180
Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 22,862 59,782
Other Investments    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 125,061 111,458
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 | Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 3 | Other Investments    
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 43,714 37,648
Fair Value, Inputs, Level 1 | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 12,416 12,505
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 | Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 1 | Other Investments    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 31,298 25,143
Fair Value, Inputs, Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 93,763 86,315
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 | Partnership and joint venture interests    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value 0 0
Fair Value, Inputs, Level 2 | Other Investments    
Defined Benefit Plan Disclosure [Line Items]    
Pension plans assets, fair value $ 93,763 $ 86,315