Divestitures and Other Transactions - PChem Results of Operations (Details) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($)
Performance Chemicals \| Accounts and Notes Receivable [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnification Asset for liabilities indemnified by Chemours	$ 63
Performance Chemicals \| Other Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnification Asset for liabilities indemnified by Chemours	259
Performance Chemicals \| Accrued and Other Current Liabilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnified Liabilities for liabilities indemnified by Chemours	(10)
Performance Chemicals \| Other noncurrent obligations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnified Liabilities for liabilities indemnified by Chemours	(44)
Performance Chemicals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations before income taxes	$ 3

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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