DEBT - Credit facility (Details)			12 Months Ended
	Feb. 06, 2019 USD ($) incremental_revolving_commitment	Jul. 15, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Prepayment penalty, percentage, until July 14, 2018		2.00%
Prepayment penalty, percentage, after July 15, 2018		1.00%
Line of Credit
Line of Credit Facility [Line Items]
Amount available for future borrowings					$ 276,000,000
Line of Credit | Revolving Credit Facilities
Line of Credit Facility [Line Items]
Outstanding balance of ABL Facility					0
Line of Credit | Letter of Credit
Line of Credit Facility [Line Items]
Amount issued in letters of credit					35,000,000
Line of Credit | ABL Amendment Facility
Line of Credit Facility [Line Items]
Number of incremental revolving commitments | incremental_revolving_commitment	1
Credit facility, maximum borrowing capacity, accordion feature	$ 75,000,000
Unused capacity, commitment fee percentage	0.25%
Line of Credit | ABL Amendment Facility | Revolving Credit Facilities
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity	$ 350,000,000
Line of Credit | ABL Amendment Facility | Letter of Credit
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity	100,000,000
Line of Credit | ABL Amendment Facility | Swingline Loans
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity	$ 35,000,000
Line of Credit | ABL Facility | Revolving Credit Facilities
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity					$ 311,000,000
Line of Credit | Term Loan Facility | Revolving Credit Facilities
Line of Credit Facility [Line Items]
Credit facility, borrowing capacity		$ 375,000,000
Secured Notes due in 2021 | Verso Paper Holdings LLC
Line of Credit Facility [Line Items]
Debt issuance costs iccured		8,000,000
Secured Notes due in 2021 | Term Loan Facility
Line of Credit Facility [Line Items]
Debt instrument, face amount		220,000,000
Current borrowing capacity		198,000,000
Debt issuance costs, gross		22,000,000
Periodic payment		$ 4,000,000	$ 9,000,000	$ 18,000,000
Minimum | LIBOR | Line of Credit | ABL Amendment Facility
Line of Credit Facility [Line Items]
Interest rate over the reference rate	1.25%
Minimum | Base Rate | Line of Credit | ABL Amendment Facility
Line of Credit Facility [Line Items]
Interest rate over the reference rate	0.25%
Maximum | LIBOR | Line of Credit | ABL Amendment Facility
Line of Credit Facility [Line Items]
Interest rate over the reference rate	1.75%
Maximum | Base Rate | Line of Credit | ABL Amendment Facility
Line of Credit Facility [Line Items]
Interest rate over the reference rate	0.75%