Commitments and Contingent Liabilities Litigation (Details)	3 Months Ended		12 Months Ended	60 Months Ended	75 Months Ended
	Mar. 31, 2018 USD ($) lawsuits	Mar. 31, 2017 USD ($)	Dec. 31, 2004 USD ($)	Jul. 06, 2022	Mar. 31, 2018 USD ($) lawsuits	Jan. 01, 2012
PFOA Matters
Loss Contingencies [Line Items]
Accrual balance	$ 14,000,000				$ 14,000,000
PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Escrow Deposit					2,000,000
Litigation Settlement, Medical Monitoring Program, Escrow Account, Disbursements To Date					$ 1,000,000
Loss Contingency, Number Of Water Districts Receiving Water Treatment						6
PFOA Matters: Multi-District Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Limited Sharing of Potential Future Liabilities, Period				5 years
Period for sharing for PFOA liabilities				5 years
Disease Categories for MDL	6				6
Lawsuits alleging personal injury filed | lawsuits	3,550				3,550
Litigation Settlement, Amount Awarded to Other Party		$ 670,700,000
Loss Contingency, Limited Sharing of Potential Future Liabilities, Third-Party Annual Liability Threshold	$ 25,000,000				$ 25,000,000
Predecessor [Member] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Binding Settlement Agreement Class Size			80,000
Litigation Settlement, Liability For Medical Monitoring Program, Threshold			$ 235,000,000
Predecessor [Member] | Payment for Plaintiffs Attorney Fees [Member] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Plaintiffs' attorneys' fees and expenses			23,000,000
Predecessor [Member] | Payment to fund community health project [Member] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Payments to fund community health project			$ 70,000,000
WEST VIRGINIA AND OHIO [Domain] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	34				34
NEW YORK | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs	5
Loss Contingency, Pending Claims, Number	3				3
NORTH CAROLINA | Successor [Member] | PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Additional Plaintiffs	70
Chemours [Member] | PFOA Matters
Loss Contingencies [Line Items]
Indemnification Assets	$ 14,000,000				$ 14,000,000
Chemours [Member] | PFOA Matters: Multi-District Litigation [Member]
Loss Contingencies [Line Items]
Additional annual PFOA liabilities for the next five years paid by Chemours	$ 25,000,000				$ 25,000,000