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Related Party Transactions - Schedule of Feedstock Purchased Cost of Goods Sold (Details) - Slagger - Advanced Metal Industries Cluster Company Limited - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Purchases of feedstock material	$ 44	$ 91	$ 124
Settled as in-kind repayment of Tronox Loans
Related Party Transaction [Line Items]
Purchases of feedstock material	10	58	44
Settled in cash
Related Party Transaction [Line Items]
Purchases of feedstock material	$ 34	$ 33	$ 80

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