| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| ASSETS | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 58.1 | 55.2 | 24.6 | 12.2 | 18.3 | 26.6 | 46.2 | 44.8 |
| Accounts receivable, net of allowance of $5,145 and $5,262 respectively | 186.7 | 168.3 | 194.1 | 245.6 | 268.4 | 302.0 | 262.8 | 214.3 |
| Inventory | 36.3 | 35.4 | 36.9 | 39.2 | 48.5 | 49.7 | 49.6 | 27.9 |
| Income tax receivable | 0.8 | 4.3 | 1.5 | 0.3 | 0.3 | 0.9 | 0.5 | 3.9 |
| Prepaid expenses and other current assets | 77.1 | 62.6 | 40.6 | 20.3 | 19.4 | 18.0 | 25.8 | 11.7 |
| Total current assets | 347.6 | 402.3 | 283.7 | 317.6 | 355.0 | 397.1 | 401.4 | 314.6 |
| Property, plant and equipment, net | 138.1 | 145.5 | 170.3 | 192.0 | | | | |
| Intangible assets, net | 75.4 | 88.3 | 103.3 | 117.0 | 131.4 | 160.2 | 176.1 | 99.1 |
| Operating lease right-of-use assets | 48.5 | 58.5 | 63.9 | 67.0 | | | | |
| Defined benefit pension asset | 0.4 | 2.9 | | | | | | |
| Other assets, net | 6.4 | 8.4 | 11.6 | 4.4 | 7.4 | 5.8 | 4.8 | 2.4 |
| Deferred tax asset | 0.4 | 0.7 | 6.8 | 5.2 | 7.7 | 4.8 | 6.2 | 1.3 |
| Total assets | 616.6 | 706.5 | 731.0 | 985.2 | 977.8 | 1,055.8 | 1,147.4 | 799.0 |
| |
| LIABILITIES AND EQUITY | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Current portion of long-term debt and finance lease obligations | 281.0 | 0.7 | 0.3 | 5.3 | 0.6 | | 20.0 | 20.0 |
| Current portion of operating lease obligations | 13.8 | 15.4 | 17.4 | 17.1 | | | | |
| Accounts payable | 32.5 | 44.1 | 42.1 | 41.6 | 44.1 | 55.3 | 47.8 | 22.4 |
| Other accrued liabilities | 221.9 | 205.3 | 123.5 | 146.7 | 95.3 | 92.5 | 79.9 | 85.2 |
| Income tax payable | 2.3 | | | | | | | |
| Total current liabilities | 448.9 | 188.3 | 133.0 | 150.5 | 140.0 | 147.8 | 147.7 | 92.2 |
| Long-term debt and finance lease obligations | 4.9 | 405.2 | 312.2 | 325.3 | 356.8 | 387.7 | | |
| Operating lease obligations | 38.8 | 47.6 | 52.2 | 54.4 | | | | |
| Deferred tax liabilities | 3.7 | 3.8 | 4.4 | 7.0 | 6.1 | 18.4 | 93.3 | 17.3 |
| Other long-term liabilities | 2.6 | 9.8 | 9.3 | 2.0 | 6.9 | 9.8 | 2.6 | |
| Total liabilities | 498.9 | 654.7 | 516.4 | 548.5 | 520.7 | 578.7 | 611.8 | 460.8 |
| |
| Commitments and contingencies | | | | | | | | |
| Equity: | | | | | | | | |
| Common stock | 1.3 | 0.9 | 9.3 | 9.2 | 9.1 | 9.0 | 8.9 | 6.6 |
| Additional paid-in capital | 457.1 | 453.2 | 422.6 | 409.0 | 401.0 | 352.5 | 336.8 | 120.1 |
| Accumulated deficit | -301.7 | -375.6 | -189.6 | 48.7 | 81.5 | 135.5 | 218.9 | 251.0 |
| Accumulated other comprehensive loss | -39.0 | -26.7 | -27.7 | -30.2 | -34.4 | -19.8 | -29.0 | -18.4 |
| Total equity | 117.8 | 51.9 | 214.6 | 436.7 | 457.1 | 477.2 | 535.6 | 338.1 |
| Total liabilities and equity | 616.6 | 706.5 | 731.0 | 985.2 | 977.8 | 1,055.8 | 1,147.4 | 799.0 |