Benefit Plans - Schedule of Pension Plans' Fair Value Measurements (Details) - USD ($) $ in Thousands	Aug. 31, 2026	Aug. 31, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	$ 736,303	$ 776,286
Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	48,347	68,865
Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	84,435	85,685
Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	25,298	40,786
Cash and cash equivalents \| Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	25,298	40,786
Cash and cash equivalents \| Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Cash and cash equivalents \| Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Common/collective trust at net asset value
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	160,457	172,659
Common/collective trust at net asset value \| Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Common/collective trust at net asset value \| Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Common/collective trust at net asset value \| Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Common/collective trust at net asset value
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	420,675	426,785
Common/collective trust at net asset value \| Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Common/collective trust at net asset value \| Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Common/collective trust at net asset value \| Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	107,484	113,764
Fixed income securities \| Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	23,049	28,079
Fixed income securities \| Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	84,435	85,685
Fixed income securities \| Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Partnership and joint venture interests measured at net asset value
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	22,389	22,292
Partnership and joint venture interests measured at net asset value \| Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Partnership and joint venture interests measured at net asset value \| Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	0	0
Partnership and joint venture interests measured at net asset value \| Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets fair value	$ 0	$ 0