| In millions, except per share items | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 |
| | 10-Q | 10-Q | 8-K | 8-K | 10-Q | 10-Q | 8-K | 10-Q |
| Net income | -0.4 | 6.5 | 5.7 | 4.6 | -15.9 | 1.5 | -12.6 | -11.0 |
| Depreciation and amortization | 57.4 | 55.6 | | | 118.2 | 58.3 | | 58.9 |
| Depreciation | | | | 57.5 | | | 59.2 | |
| Stock-based compensation | | 6.6 | | | | 5.5 | | 4.5 |
| Change in working capital [+] | | -0.3 | | | 9.9 | 22.6 | | |
| Accounts receivable | | 3.9 | | | 4.1 | 4.9 | | |
| Other | | -4.2 | | | 5.8 | 17.8 | | |
| Other operating activities | -57.0 | -9.6 | | | 22.2 | -29.6 | | -45.4 |
| Cash from operations | 0.0 | 58.7 | | | 134.5 | 58.3 | | 7.0 |
| |
| Capital expenditures | 0.0 | -29.0 | | | 52.1 | -19.3 | | 0.0 |
| Purchases of property and equipment | | -29.0 | | | 52.1 | -19.3 | | |
| Purchases of short-term investments, net | | | | | 9.6 | -7.0 | | |
| Purchases of short-term investments | | | | | 9.6 | -9.6 | | |
| Sales of short-term investments | | | | | | 2.6 | | |
| Other cash from investing | | -59.1 | | | -123.7 | | | |
| Cash from investing | 0.0 | -88.2 | | | -62.0 | -26.3 | | 0.0 |
| |
| Cash dividends paid | | -15.3 | | | 30.6 | -15.3 | | |
| Other cash from financing | | -16.5 | | | -60.5 | 6.2 | | |
| Cash from financing | 0.0 | -31.9 | | | -29.9 | -9.1 | | 0.0 |
| |
| Free cash flow | 0.0 | 29.6 | | | 186.6 | 39.0 | | 7.0 |
| Per share (diluted) | $0.00 | $0.09 | | | $0.85 | $0.18 | | $0.03 |
| |
| Cash paid for interest | | 33.2 | | | 65.2 | 32.4 | | |
| Cash paid for income taxes | | 1.2 | | | 0.2 | 0.0 | | |