| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] | | | | | | | | |
| Cash flows from operating activities: | | | | | | | | |
| Net income | | 179.2 | 164.5 | 132.6 | 61.2 | 49.9 | 2.1 | -22.1 |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation and amortization | | 42.7 | 43.9 | 45.3 | 46.8 | 48.0 | 50.6 | 52.5 |
| Deferred income tax provision | | -23.4 | -15.1 | -14.7 | -12.8 | -14.2 | -0.1 | -0.7 |
| Stock-based compensation | | 4.3 | 4.5 | 4.0 | 3.4 | 3.4 | 2.6 | 2.8 |
| Issuance of stock under 401(k) plan | | 1.6 | 1.4 | 1.3 | 1.3 | 1.2 | 1.4 | 1.3 |
| Foreign currency gain | | 2.7 | -1.1 | -3.6 | -4.8 | -8.9 | -9.4 | -5.3 |
| (Increase) decrease in assets: | | | | | | | | |
| Accounts receivable | | -27.2 | -42.8 | -51.5 | -68.3 | -74.7 | -67.8 | -65.6 |
| Inventories | | -19.6 | -67.5 | -98.7 | -119.8 | -112.9 | -88.4 | -38.4 |
| Prepaid and other current assets | | 11.4 | 4.9 | -7.1 | -22.0 | -15.7 | -10.8 | -5.5 |
| Other assets | | -1.3 | -12.8 | -13.5 | -6.0 | -5.3 | 0.9 | 1.2 |
| Increase (decrease) in liabilities: | | | | | | | | |
| Accounts payable | | -7.8 | 19.3 | 57.6 | 84.5 | 121.2 | 102.0 | 94.6 |
| Other current liabilities | | 18.9 | 40.5 | 39.0 | 28.1 | 14.8 | 19.5 | 12.8 |
| Other liabilities | | 0.5 | -3.1 | -1.8 | -10.2 | -11.6 | -19.1 | -17.4 |
| Net cash provided by operating activities | | 160.7 | 115.3 | 77.1 | 8.2 | 10.7 | 7.5 | 34.2 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | | -47.0 | -47.3 | -43.6 | -37.6 | -38.8 | -32.6 | -27.9 |
| Net cash used for investing activities | | -36.8 | -37.3 | -33.6 | -26.9 | -37.6 | -15.3 | 7.4 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Proceeds from borrowings | | 88.9 | 103.8 | 126.2 | 552.1 | 497.1 | 487.9 | 474.8 |
| Payment on debt | | -124.7 | -130.0 | -121.1 | -96.3 | -69.2 | -69.7 | -86.4 |
| Net cash used for financing activities | | -61.3 | -50.9 | -19.5 | 18.6 | 13.9 | 2.6 | -30.5 |
| |
| Supplemental information: | | | | | | | | |
| Interest paid | | 31.6 | 36.4 | 34.2 | 34.4 | 34.6 | 28.2 | 30.5 |
| Income taxes paid, net of refunds received | | | 27.7 | 12.5 | 9.1 | | 10.8 | 9.2 |
| Cash and cash equivalents | | | | | | | | |