Commitments and Contingent Liabilities Guarantees (Details) $ in Millions	Dec. 31, 2017 USD ($)
Successor [Member]
Guarantor Obligations [Line Items]
Guarantee Obligations	$ 297
Customer and Supplier Guarantee, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Guaranteed Obligations, Maximum Term, Years	5 years
Customer and Supplier Guarantee, Bank Borrowings [Member] | Successor [Member]
Guarantor Obligations [Line Items]
Guarantee Obligations	$ 89	[1]
Equity Affiliates Guarantee, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Guaranteed Obligations, Maximum Term, Months	12 months
Equity Affiliates Guarantee, Bank Borrowings [Member] | Successor [Member]
Guarantor Obligations [Line Items]
Guarantee Obligations	$ 161	[2]
Chemours Purchase Obligations [Member]
Guarantor Obligations [Line Items]
Guaranteed Obligations, Maximum Term, Months	12 months
Chemours Purchase Obligations [Member] | Successor [Member]
Guarantor Obligations [Line Items]
Guarantee Obligations	$ 10	[3]
Residual Value Guarantee [Member]
Guarantor Obligations [Line Items]
Guaranteed Obligations, Maximum Term, Years	12 years
Residual Value Guarantee [Member] | Successor [Member]
Guarantor Obligations [Line Items]
Guarantee Obligations	$ 37	[4]

[1] Existing guarantees for customers and suppliers, as part of contractual agreements.

[2] Existing guarantees for non-consolidated affiliates' liquidity needs in normal operations.

[3] Guarantee for Chemours' raw material purchase obligations under agreement with third party supplier.

[4] The company provides guarantees related to leased assets specifying the residual value that will be available to the lessor at lease termination through sale of the assets to the lessee or third parties.