| In millions, except per share items | Mar-31-23 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | | 124.8 | 153.4 | 143.7 | 141.1 | 130.2 | 124.4 | 137.7 |
| Depreciation and amortization | | 58.7 | 60.6 | 61.4 | 60.0 | 61.6 | 63.3 | 65.3 |
| Stock-based compensation | | 12.6 | 17.0 | 20.7 | 28.8 | 33.8 | 31.8 | 31.4 |
| Deferred taxes | | | -67.1 | -21.3 | | 30.5 | | 37.9 |
| Change in working capital [+] | | | 142.1 | 66.7 | 81.4 | -116.4 | -88.7 | -15.6 |
| Accounts receivable | | | 62.9 | 15.0 | 97.2 | -86.7 | -54.6 | 36.9 |
| Other current assets | | | 26.9 | 32.1 | 20.5 | -20.1 | 11.9 | 9.2 |
| Accounts payable | | | 32.7 | 24.3 | -6.0 | 9.8 | -60.9 | -36.8 |
| Other | | | 19.6 | -4.7 | -30.3 | -19.4 | 14.9 | -24.9 |
| Other operating activities | | -93.2 | -112.0 | -71.6 | -21.1 | 116.7 | 146.9 | 107.1 |
| Cash from operations | | 137.7 | 194.0 | 199.6 | 320.6 | 256.4 | 311.5 | 363.8 |
| |
| Capital expenditures | | -27.2 | -35.7 | -37.3 | -40.9 | -50.7 | -55.4 | -54.6 |
| Purchases of property and equipment | | | -35.7 | -37.3 | -40.9 | -50.7 | -55.4 | -54.6 |
| Purchases of short-term investments | | | | | | | -8.6 | -6.7 |
| Purchases of short-term investments | | | | | | | -33.6 | -31.7 |
| Other cash from investing | | | | | | | | 0.3 |
| Cash from investing | | -27.2 | -35.7 | -39.2 | -47.7 | -34.0 | -63.7 | -61.0 |
| |
| Cash dividends paid | | | -1.5 | -428.8 | | | -428.5 | |
| Repurchase of common stock, net | | | 3.8 | | -31.3 | -43.1 | -42.9 | -44.2 |
| Other cash from financing | | | -53.4 | -188.4 | -198.2 | -183.4 | -175.3 | -41.7 |
| Cash from financing | | -37.6 | -51.1 | -609.5 | -658.0 | -655.0 | -646.7 | -85.9 |
| |
| Free cash flow | | 110.5 | 158.3 | 162.3 | 279.7 | 205.7 | 256.1 | 309.2 |
| Per share (diluted) | | $1.32 | $1.91 | $1.98 | $3.42 | $2.52 | $3.14 | $3.76 |
| |
| Cash paid for interest | | | 13.9 | 14.0 | 16.0 | 16.2 | 18.3 | 19.7 |