| In millions, except per share items | Sep-30-20 | Jun-30-20 | Jun-05-20 | Mar-31-20 | Mar-05-20 | Dec-31-19 | Dec-05-19 | Sep-30-19 |
| | 10-Q | 10-Q | 8-K | 10-Q | 8-K | 10-K | 8-K | 10-Q |
| Net income | 200.4 | 214.1 | | 236.1 | | 318.7 | | 312.3 |
| Depreciation and amortization | 14.4 | 13.3 | | 11.0 | | 8.9 | | 6.4 |
| Deferred taxes | 5.7 | 9.9 | | 4.9 | | 25.9 | | 34.9 |
| Change in working capital [+] | -24.3 | -31.4 | | 1.4 | | 7.2 | | -20.1 |
| Accounts receivable | | | | | | -13.8 | | |
| Income taxes | -1.6 | -5.3 | | 7.9 | | 13.1 | | 1.3 |
| Other | -8.8 | -12.3 | | 7.3 | | 8.0 | | 12.6 |
| Other operating activities | 23.8 | 17.7 | | -4.0 | | -18.0 | | 15.5 |
| Cash from operations | 220.0 | 223.7 | | 249.4 | | 342.8 | | 348.8 |
| |
| Capital expenditures [+] | 27.6 | 27.6 | | 27.6 | | 27.6 | | 40.0 |
| Purchases of property and equipment | | | | | | 27.6 | | |
| Sales of property and equipment | | | | | | | | 0.1 |
| Other cash from investing | -57.6 | -59.4 | | -104.0 | | -139.4 | | -185.9 |
| Cash from investing | -30.0 | -31.7 | | -76.3 | | -111.7 | | -145.8 |
| |
| Cash dividends paid | | | | -124.1 | | | | |
| Cash from financing | -124.1 | -124.1 | | -124.1 | | -50.9 | | -63.8 |
| |
| Free cash flow | 247.6 | 251.2 | | 277.0 | | 370.4 | | 388.8 |
| Per share (diluted) | $31.92 | $32.39 | | $35.71 | | $47.75 | | $50.08 |
| |
| Cash paid for income taxes | 48.8 | 51.3 | | 49.0 | | 44.4 | | 43.0 |