| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash Flows From Operating Activities: | | | | | | | | |
| Net income (loss) | -3.0 | -101.0 | 70.0 | 171.0 | -30.0 | | | -353.0 |
| Adjustments to reconcile net income (loss) to net cash from (used in) operating activities: | | | | | | | | |
| Depreciation and amortization | 154.0 | 153.0 | 183.0 | 111.0 | 115.0 | | | 91.0 |
| Noncash restructuring charges | 11.0 | 5.0 | 20.0 | | | | | |
| Net periodic pension cost (income) | -23.0 | -16.0 | -14.0 | -7.0 | 6.0 | | | 8.0 |
| Pension plan contributions | -25.0 | -49.0 | -42.0 | -43.0 | -32.0 | | | -8.0 |
| Amortization of debt issuance cost | 1.0 | | 1.0 | 19.0 | 9.0 | | | 9.0 |
| Gain on Sale of Androscoggin/Stevens Point Mills | | -94.0 | | | | | | |
| Loss on Sale of Duluth Mill | 3.0 | | | | | | | |
| Equity award expense | 5.0 | 5.0 | 12.0 | 8.0 | 1.0 | | | 2.0 |
| (Gain) loss on sale or disposal of assets | 1.0 | 4.0 | 2.0 | -8.0 | 3.0 | | | |
| Gain on insurance recoveries | -6.0 | | | | | | | |
| Deferred taxes | -3.0 | -9.0 | -91.0 | | -8.0 | | 4.0 | |
| Changes in assets and liabilities: | | | | | | | | |
| Accounts receivable, net | -23.0 | 32.0 | 44.0 | 11.0 | -13.0 | | | 17.0 |
| Inventories | 92.0 | 79.0 | -7.0 | -12.0 | 60.0 | | | 17.0 |
| Prepaid expenses and other assets | 2.0 | -2.0 | 5.0 | 4.0 | 6.0 | | | -15.0 |
| Accounts payable | 13.0 | -64.0 | -34.0 | 40.0 | 67.0 | | | -22.0 |
| Accrued and other liabilities | -19.0 | -5.0 | -24.0 | -12.0 | -21.0 | | -74.0 | 70.0 |
| Net cash provided by (used in) operating activities | 180.0 | -62.0 | 125.0 | 283.0 | 153.0 | | -266.0 | -58.0 |
| |
| Cash Flows From Investing Activities: | | | | | | | | |
| Proceeds from sale of assets | 2.0 | 6.0 | 1.0 | 17.0 | | | 51.0 | 1.0 |
| Capital expenditures | -66.0 | -48.0 | -105.0 | -73.0 | -40.0 | | -64.0 | -42.0 |
| Net proceeds from Sale of Duluth Mill | 6.0 | | | | | | | |
| Proceeds from insurance recoveries | 6.0 | | | | | | | |
| Recognition of deposits and net proceeds from sale of Luke Mill equipment | 10.0 | | | | | | | |
| Net proceeds from Sale of Androscoggin/Stevens Point Mills | | 345.0 | | | | | | |
| Net cash provided by (used in) investing activities | -42.0 | 303.0 | -104.0 | -52.0 | -40.0 | | 111.0 | -25.0 |
| |
| Cash Flows From Financing Activities: | | | | | | | | |
| Borrowings on ABL Facility | | 36.0 | 428.0 | 442.0 | 186.0 | | | 433.0 |
| Payments on ABL Facility | | -36.0 | -428.0 | -507.0 | -233.0 | | | |
| Principal payment on finance lease obligations | -1.0 | -1.0 | -1.0 | | | | | |
| Repurchase of common stock | -80.0 | -34.0 | -3.0 | | | | | |
| Acquisition of treasury stock | -80.0 | -34.0 | -3.0 | | | | | |
| Dividends paid to stockholders | -12.0 | -111.0 | | | | | | |
| Debt issuance costs | | | -1.0 | | | | | -2.0 |
| Net cash provided by (used in) financing activities | -103.0 | -146.0 | -5.0 | -212.0 | -113.0 | | 153.0 | 78.0 |
| Change in Cash and cash equivalents and restricted cash | 35.0 | 95.0 | 16.0 | 19.0 | | | | |
| |
| Supplementary cash flow disclosures: | | | | | | | | |
| Total interest paid | 1.0 | 1.0 | 2.0 | 16.0 | 30.0 | | 246.0 | 117.0 |
| Total income taxes paid | | | 3.0 | | | | | |
| Noncash investing and financing activities: | | | | | | | | |
| Right of use assets recorded upon adoption of ASC 842 | | | 24.0 | | | | | |
| Right of use assets obtained in exchange for new finance lease liabilities | 1.0 | 1.0 | 8.0 | | | | | |
| Right of use assets obtained in exchange for new capitalized operating lease liabilities | 1.0 | 8.0 | 2.0 | | | | | |