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Related Parties - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	32 Months Ended
	Sep. 30, 2024	Dec. 31, 2022	Dec. 31, 2023	May 10, 2023	Dec. 17, 2020	Dec. 29, 2019	May 09, 2018
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)	157,920,455		156,793,755
Accrued interest income balance	$ 140		$ 218
Related Party
Related Party Transaction [Line Items]
Ownership percentage by related party				35.00%
Related Party \| Slagger
Related Party Transaction [Line Items]
Ownership percentage by related party				65.00%
Advanced Metal Industries Cluster Company Limited \| Option Agreement, Option To Acquire Special Purchase Vehicle \| Related Party
Related Party Transaction [Line Items]
Ownership percentage by related party							90.00%
Advanced Metal Industries Cluster Company Limited \| Acquisition Of Assets Producing Metal Grade TiCl4 \| Related Party
Related Party Transaction [Line Items]
Accrued interest income balance						$ 36
Slagger \| Advanced Metal Industries Cluster and Toho Titanium Metal Co. Ltd (ATTM)
Related Party Transaction [Line Items]
Loan commitment							$ 322
AMIC \| Option Agreement, Amounts to be Reimbursed for Capital Expenditures and Operational Expenses
Related Party Transaction [Line Items]
Amount loaned to related parties		$ 36
AMIC \| Option Agreement, Amounts to be Reimbursed for Capital Expenditures and Operational Expenses \| Related Party
Related Party Transaction [Line Items]
Amounts receivable from related party							$ 125
Cristal \| Related Party \| MGT Loan
Related Party Transaction [Line Items]
Total outstanding note payable	$ 20		$ 25		$ 36
Cristal \| Related Party \| MGT Loan \| Minimum
Related Party Transaction [Line Items]
Debt instrument, term	3 years
Cristal \| Related Party \| MGT Loan \| Maximum
Related Party Transaction [Line Items]
Debt instrument, term	4 years
Cristal's Titanium Dioxide Business
Related Party Transaction [Line Items]
Ownership percentage	24.00%
Acquisition Of Assets Producing Metal Grade TiCl4 \| Related Party \| Advanced Metal Industries Cluster and Toho Titanium Metal Co. Ltd (ATTM)
Related Party Transaction [Line Items]
Ownership percentage						65.00%
Cristal's Titanium Dioxide Business
Related Party Transaction [Line Items]
Common stock, shares outstanding (in shares)	37,580,000