Benefit Plans - Schedule of Pension Plans' Fair Value Measurements (Details) - USD ($) $ in Thousands	Aug. 31, 2023	Aug. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	$ 736,150
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	12,505
Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	127,225
Fixed Income Securities: Common/collective trust [Member] [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	425,180
Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	59,782
Other Investments
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	111,458
Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 3 | Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	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
Fair Value, Inputs, Level 3 | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 3 | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	37,648	$ 7,472
Fair Value, Inputs, Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	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
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
Fair Value, Inputs, Level 1 | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 1 | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	25,143
Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	86,315
Fair Value, Inputs, Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 2 | Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	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
Fair Value, Inputs, Level 2 | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	0
Fair Value, Inputs, Level 2 | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value	$ 86,315
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		787,422
Pension Benefits | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		7,472
Pension Benefits | Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		142,730
Pension Benefits | Fixed Income Securities: Common/collective trust [Member] [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		550,046
Pension Benefits | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		87,174
Pension Benefits | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | Fair Value, Inputs, Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | Fair Value, Inputs, Level 3 | Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | 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
Pension Benefits | Fair Value, Inputs, Level 3 | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | Fair Value, Inputs, Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		7,472
Pension Benefits | Fair Value, Inputs, Level 1 | Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | 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
Pension Benefits | Fair Value, Inputs, Level 1 | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | Fair Value, Inputs, Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | Fair Value, Inputs, Level 2 | Equity Securities: Common/collective trust [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		0
Pension Benefits | 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
Pension Benefits | Fair Value, Inputs, Level 2 | Partnership and joint venture interests
Defined Benefit Plan Disclosure [Line Items]
Pension plans assets, fair value		$ 0