v3.26.1
Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2026
Sep. 30, 2025
Loss Contingencies [Line Items]    
Environmental accrual for estimated claims associated with divested business $ 4  
Respirator Liabilities [Member]    
Loss Contingencies [Line Items]    
Respirator reserve $ 32 $ 33