v3.26.1
Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]        
Currency exchange contracts $ 6,546 $ 5,454 $ 10,964 $ 8,589
Recognition of actuarial losses (2,892) (2,052) (8,658) (7,036)
Tax impact 58 249 119 376
Provision for income taxes 18,589 10,219 41,124 26,052
Reclassification out of Accumulated Other Comprehensive Loss | Derivatives attributable to noncontrolling interests        
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]        
Total before tax 237 1,017 485 1,536
Tax impact 58 249 119 376
Net of tax (179) (768) (366) (1,160)
Reclassification out of Accumulated Other Comprehensive Loss | Pension and other postretirement benefits attributable to Kennametal        
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]        
Amortization of prior service credit (68) (65) (203) (196)
Recognition of actuarial losses 2,960 2,117 8,861 6,396
Settlement 0 0 0 836
Total before tax 2,892 2,052 8,658 7,036
Provision for income taxes (730) (500) (1,974) (1,759)
Net of tax (2,162) (1,552) (6,684) (5,277)
Reclassification out of Accumulated Other Comprehensive Loss | Forward starting interest rate swaps | Derivatives attributable to noncontrolling interests        
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]        
Forward starting interest rate swaps (255) (255) (766) (766)
Reclassification out of Accumulated Other Comprehensive Loss | Currency exchange contracts | Derivatives attributable to noncontrolling interests        
Reclassification Adjustment out of Accumulated Other Comprehensive Loss [Line Items]        
Currency exchange contracts $ 18 $ (762) $ 281 $ (770)