v3.26.1
FAIR VALUE MEASUREMENT (Details) - EBP 002 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Investments at fair value $ 579,665,268 $ 538,855,984
Fair Value, Inputs, Level 1, Level 2, and Level 3    
EBP, Master Trust [Line Items]    
Investments at fair value 118,942,975 291,099,237
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 94,876,880 268,678,941
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Kennametal Inc. capital stock    
EBP, Master Trust [Line Items]    
Investments at fair value 13,234,944 12,365,608
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Common stocks    
EBP, Master Trust [Line Items]    
Investments at fair value 5,435,126 4,349,698
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Investments at fair value 1,662,794 2,407,857
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Common/Collective trusts    
EBP, Master Trust [Line Items]    
Investments at fair value 2,319,052 1,790,845
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 1,118,444 1,228,945
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Corporate bonds    
EBP, Master Trust [Line Items]    
Investments at fair value 178,051 165,032
Fair Value, Inputs, Level 1, Level 2, and Level 3 | U.S. government securities    
EBP, Master Trust [Line Items]    
Investments at fair value 117,684 112,311
Level 1    
EBP, Master Trust [Line Items]    
Investments at fair value 118,647,240 290,821,894
Level 1 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 94,876,880 268,678,941
Level 1 | Kennametal Inc. capital stock    
EBP, Master Trust [Line Items]    
Investments at fair value 13,234,944 12,365,608
Level 1 | Common stocks    
EBP, Master Trust [Line Items]    
Investments at fair value 5,435,126 4,349,698
Level 1 | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Investments at fair value 1,662,794 2,407,857
Level 1 | Common/Collective trusts    
EBP, Master Trust [Line Items]    
Investments at fair value 2,319,052 1,790,845
Level 1 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 1,118,444 1,228,945
Level 1 | Corporate bonds    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 1 | U.S. government securities    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2    
EBP, Master Trust [Line Items]    
Investments at fair value 295,735 277,343
Level 2 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2 | Kennametal Inc. capital stock    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2 | Common stocks    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2 | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2 | Common/Collective trusts    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 2 | Corporate bonds    
EBP, Master Trust [Line Items]    
Investments at fair value 178,051 165,032
Level 2 | U.S. government securities    
EBP, Master Trust [Line Items]    
Investments at fair value 117,684 112,311
Level 3    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Kennametal Inc. capital stock    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Common stocks    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Common/Collective trusts    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Mutual funds    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | Corporate bonds    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Level 3 | U.S. government securities    
EBP, Master Trust [Line Items]    
Investments at fair value 0 0
Investments measured at NAV    
EBP, Master Trust [Line Items]    
Investments at fair value $ 460,722,293 $ 247,756,747