| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 8-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -52.7 | -7.2 | 0.0 | -3.8 | -110.0 | 5.3 | 9.4 | -0.3 |
| Depreciation and amortization | 8.0 | 7.8 | | 8.0 | 8.1 | 8.1 | 8.3 | 4.4 |
| Asset impairment charges | 64.0 | | | | 144.9 | | | |
| Stock-based compensation | 2.1 | 2.2 | | 2.0 | 2.4 | 2.4 | 1.7 | 1.8 |
| Deferred taxes | -18.0 | 0.7 | | -3.8 | -36.0 | 0.9 | 3.0 | 0.8 |
| Change in working capital [+] | 9.8 | 1.3 | | 4.0 | 9.4 | 6.0 | -6.0 | 3.1 |
| Accounts receivable | 6.6 | 5.3 | | -0.7 | 6.8 | 6.6 | -6.6 | 0.2 |
| Other current assets | 2.0 | -6.0 | | 3.1 | 0.8 | -3.6 | 1.5 | 1.1 |
| Accounts payable | -1.1 | 3.0 | | | -8.7 | -2.5 | 4.4 | |
| Accrued expenses | -0.6 | 0.0 | | | 10.4 | 2.5 | -3.4 | |
| Income taxes | 1.5 | -2.3 | | 0.6 | 0.0 | 0.5 | 6.2 | -0.7 |
| Other | 1.4 | 1.4 | | 1.0 | 0.1 | 2.4 | -8.1 | 2.5 |
| Other operating activities | 2.7 | 8.0 | | 0.5 | 1.4 | 2.6 | -0.7 | -18.2 |
| Cash from operations | 15.7 | 12.8 | | 6.9 | 20.1 | 25.3 | 15.7 | -8.3 |
| |
| Capital expenditures | -3.3 | -3.2 | | -3.6 | -4.3 | -3.0 | -6.0 | -2.8 |
| Purchases of property and equipment | -3.3 | -3.2 | | -3.6 | -4.3 | -3.0 | -6.0 | -2.8 |
| Other cash from investing | | | | 0.0 | 0.0 | 2.7 | 0.7 | -325.5 |
| Cash from investing | -3.3 | -3.2 | | -3.6 | -4.3 | -0.3 | -5.3 | -328.3 |
| |
| Repurchase of common stock, net | -7.6 | -1.4 | | -0.1 | 0.0 | -1.4 | | -0.2 |
| Other cash from financing | -1.5 | -1.5 | | -2.2 | -2.2 | -2.2 | -2.2 | 161.4 |
| Cash from financing | -9.2 | -2.8 | | -2.3 | -2.2 | -3.7 | -2.2 | 161.1 |
| |
| Free cash flow | 12.4 | 9.6 | | 3.3 | 15.8 | 22.3 | 9.7 | -11.1 |
| Per share (diluted) | $0.69 | $0.50 | | $0.17 | $0.84 | $1.18 | $0.53 | ($0.59) |
| |
| Cash paid for interest | 2.6 | 2.5 | | 3.3 | 2.7 | 2.7 | | |
| Cash paid for income taxes | 1.5 | 0.1 | | 2.8 | 0.6 | 0.0 | 0.5 | 0.1 |