v3.26.1
Contingencies (Details)
$ in Millions
12 Months Ended
Jun. 30, 2026
USD ($)
Loss Contingencies [Line Items]  
Reserve for environmental matters $ 82
Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag environmental matters
Environmental Issue  
Loss Contingencies [Line Items]  
Largest range for any one site $ 92
Minimum | Environmental Issue  
Loss Contingencies [Line Items]  
Estimated total liability for environmental sites 82
Maximum | Environmental Issue  
Loss Contingencies [Line Items]  
Estimated total liability for environmental sites $ 292