| In millions, except per share items | Dec-31-22 | Dec-31-21 | Sep-30-21 | Sep-30-20 | Sep-30-19 | Sep-30-18 | Sep-30-17 | Sep-30-16 |
| | 10-K | 8-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Operating Activities | | | | | | | | |
| Net income (loss) | 458.4 | 243.0 | -45.5 | | | 98.6 | 100.9 | 89.9 |
| |
| Adjustments to reconcile net income (loss) to net cash from (used in) operating activities: | | | | | | | | |
| Depreciation and amortization | 159.2 | 161.6 | 175.2 | | | 201.5 | 116.5 | 100.2 |
| Stock-based compensation | 27.6 | 20.5 | 22.6 | | | 16.5 | 15.1 | 17.7 |
| Certain interest expense and other financing costs | 5.2 | | 8.7 | | | | | |
| Gain on sale of fixed assets and other | -4.1 | | -3.8 | | | -1.3 | -0.8 | -1.9 |
| Deferred income taxes | 30.1 | -51.7 | -139.2 | -25.6 | -2.6 | -30.1 | 0.4 | 25.2 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | -111.4 | -93.3 | -81.3 | | | -45.0 | -60.2 | -30.4 |
| Inventories | -117.7 | -224.8 | -225.0 | | | -65.1 | -51.8 | 43.5 |
| Prepaid expenses and other current assets | -36.3 | -34.6 | 9.6 | | | 57.6 | -44.2 | -12.8 |
| Accounts payable and accrued expenses | -15.2 | 68.9 | -56.0 | 72.2 | 92.1 | 287.4 | 228.9 | -119.1 |
| Other assets and liabilities | 5.3 | -12.9 | -8.1 | -9.5 | -1.1 | 0.8 | | |
| Net cash provided by (used in) operating activities | 401.1 | 166.7 | 78.0 | 479.3 | 212.7 | 539.4 | 315.2 | 120.6 |
| |
| Investing Activities | | | | | | | | |
| Purchases of property and equipment | -90.1 | | -66.5 | 48.5 | 57.0 | -46.0 | -39.8 | -26.3 |
| Acquisition of business, net | -309.2 | -89.0 | | -5.1 | 164.0 | -2,740.5 | -129.4 | -1,018.2 |
| Proceeds from sale of assets | 5.2 | 5.4 | 4.4 | 4.4 | 9.3 | 2.1 | 2.2 | 1.9 |
| Net cash provided by (used in) investing activities | -395.6 | 716.4 | 773.9 | -39.0 | -211.7 | -2,784.4 | -167.0 | -1,042.6 |
| |
| Financing Activities | | | | | | | | |
| Borrowings under revolving lines of credit | 2,781.3 | | 252.3 | 2,038.0 | 2,100.1 | 2,807.7 | 2,464.1 | 1,892.5 |
| Payments under revolving lines of credit | -2,520.6 | -407.0 | -509.3 | | | -2,707.7 | -2,833.2 | -1,541.5 |
| Payments under term loan | | -2,248.4 | -1,300.0 | 1,870.0 | 2,114.0 | | -4.5 | -230.9 |
| Repurchase and retirement of common stock, net | -388.1 | | | | | | | |
| Payment of dividends on Preferred Stock | -24.0 | | -24.0 | 24.0 | 24.0 | -13.0 | | |
| Proceeds from issuance of common stock related to equity awards | 16.7 | | 26.3 | 3.3 | 3.3 | 7.5 | 11.3 | 24.2 |
| Payment of taxes related to net share settlement of equity awards | -5.7 | | -4.5 | 2.9 | 3.7 | -4.0 | -0.4 | 0.0 |
| Net cash provided by (used in) financing activities | -162.5 | -1,119.3 | -1,216.0 | 112.2 | -58.8 | 2,236.0 | -40.6 | 906.9 |
| Effect of exchange rate changes on cash and cash equivalents | -1.1 | | -0.5 | | | | | |
| Net increase (decrease) in cash and cash equivalents | -158.1 | | -364.6 | | | | | |
| |
| Supplemental Cash Flow Information | | | | | | | | |
| Interest | 83.4 | 95.1 | 120.0 | 130.3 | 146.4 | 111.3 | 49.1 | 57.9 |
| Income taxes, net of refunds1 | 157.1 | 123.8 | 85.2 | -5.4 | -8.5 | 35.1 | 56.2 | 14.4 |
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| Supplemental Disclosure of Non-Cash Activities | | | | | | | | |