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Telford Fire Safety Remediation (Details) - Telford Fire Safety Remediation - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Estimated environmental liability	$ 196	$ 204
Current portion of estimated environmental liability	$ 129	$ 102

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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