Contingencies (Details) $ in Millions	12 Months Ended
	Jun. 30, 2025 USD ($)
Loss Contingencies [Line Items]
Reserve for environmental matters	$ 88
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	$ 85
Minimum | Environmental Issue
Loss Contingencies [Line Items]
Estimated total liability for environmental sites	88
Maximum | Environmental Issue
Loss Contingencies [Line Items]
Estimated total liability for environmental sites	$ 290