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Related Party Transactions - Schedule of Cost of Goods Sold, Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Related Party Transaction [Line Items]
Amount due related to purchases of chlorine gas	$ 274	$ 247
Purchase of Chlorine Gas | Related Party
Related Party Transaction [Line Items]
Amount due related to purchases of chlorine gas	$ 1	$ 6

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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