v3.26.1
A. O. Smith Corporation Master Trust - Investments Measured at Fair Value Based on NAV Per Share (Details) - EBP 018 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Plan interest in A.O. Smith Corporation Master Trust at Fair Value $ 627,232,739 $ 594,940,751
NAV    
EBP, Master Trust [Line Items]    
Plan interest in A.O. Smith Corporation Master Trust at Fair Value 398,329,528 386,009,713
NAV | Common/Collective trusts    
EBP, Master Trust [Line Items]    
Plan interest in A.O. Smith Corporation Master Trust at Fair Value $ 398,329,528 $ 386,009,713