Commitments and Contingent Liabilities Performance Chemicals (Details) $ in Millions	Jun. 30, 2019 USD ($)
Loss Contingencies [Line Items]
Indemnification Assets	$ 200
Chemours [Member] | Accounts and Notes Receivable [Member]
Loss Contingencies [Line Items]
Indemnification Assets	68
Chemours [Member] | Other Assets [Member]
Loss Contingencies [Line Items]
Indemnification Assets	289
Chemours [Member] | Accrued and Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Indemnified Liabilities	68
Chemours [Member] | Other noncurrent obligations
Loss Contingencies [Line Items]
Indemnified Liabilities	$ 289