Quarterly report [Sections 13 or 15(d)]

Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details)

v3.25.4
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Prior service credit $ (185,090) $ (276,150)
Other income (deductions), net 1,527 4,178
Income before income tax 84,418 (5,830)
Income taxes (40,789) 2,358
Net income (loss) 43,629 (3,472)
Gain on divestitures, net 113,209 0
Reclassification out of Accumulated Other Comprehensive Income | Net investment hedges    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense 122 354
Post-retirement benefit plans | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income tax 289 230
Income taxes (73) (58)
Net income (loss) 216 172
Prior service credit | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Prior service credit 57 91
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Other income (deductions), net 232 139
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income tax 322 822
Income taxes (82) (204)
Net income (loss) 240 618
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense 200 468
Other | Reclassification out of Accumulated Other Comprehensive Income | Divestitures    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Gain on divestitures, net (18,810) 0
Other | Reclassification out of Accumulated Other Comprehensive Income | Divestitures    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Other current liabilities $ 0 $ (6,844)