| In millions, except per share items | Jun-30-23 | 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 |
| |
| Cash flows from operating activities: | | | | | | | | |
| Net income | 99.6 | 66.5 | 59.3 | | | 121.7 | 69.7 | |
| Adjustments to reconcile net income to cash flows from operating activities: | | | | | | | | |
| Depreciation and amortization | | 20.6 | 21.1 | | | 41.7 | 20.6 | |
| Deferred income tax benefit | | -8.9 | -12.1 | | | 6.7 | 2.5 | |
| Loss on early extinguishment of debt | | | 7.5 | | | | | |
| Working capital changes | | -47.7 | -67.0 | | | -59.5 | -41.4 | |
| Loss on marketable securities | | | 3.0 | | | 2.3 | | |
| Cash pension and postretirement contributions | | -2.8 | -2.1 | -10.3 | | -5.2 | -2.6 | -10.7 |
| Other, net | | -13.1 | | -2.7 | | | | -6.1 |
| Cash provided from (used in) operating activities | 99.6 | 17.6 | 6.8 | 20.3 | 41.0 | 54.7 | 49.4 | 67.8 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | | -15.2 | -12.6 | -143.0 | 19.6 | -64.9 | -20.5 | -153.4 |
| Purchases of marketable securities | | | -0.8 | -784.9 | 3.8 | -387.7 | | |
| Proceeds from sales and maturities of marketable securities | | | 372.8 | | | 9.9 | | |
| Cash provided from (used in) investing activities | | -15.2 | 359.4 | -15.9 | -23.4 | -401.6 | -20.5 | -33.2 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Net (repayments) borrowings under revolving credit facility | | 70.0 | 51.0 | 147.0 | 1.0 | 395.1 | 395.1 | -10.0 |
| Dividends paid | | -21.3 | -21.6 | -150.0 | 22.6 | -62.3 | -20.8 | -146.1 |
| Repurchases of common stock | | -53.4 | -37.3 | -287.9 | 91.7 | | | -202.9 |
| Redemption of 4.10% senior notes | | | -350.0 | | | | | |
| Cash costs of 4.10% senior notes redemption | | | | | | | | |
| Other, net | | 1.0 | -2.9 | 2.5 | 8.5 | -4.2 | 0.6 | 1.4 |
| Cash provided from (used in) financing activities | | -5.8 | -365.8 | 19.4 | -110.3 | -23.4 | 369.4 | -31.3 |
| Effect of foreign exchange on cash and cash equivalents | | -0.7 | | | | 0.7 | | |
| Increase (decrease) in cash and cash equivalents | | -3.8 | | | | | | |