| In millions, except per share items | Jun-30-20 | Mar-31-20 | Mar-05-20 | Dec-31-19 | Sep-30-19 | Jun-30-19 | Mar-31-19 | Mar-05-19 |
| | 10-Q | 10-Q | 8-K | 10-K | 10-Q | 10-Q | 10-Q | 8-K |
| Cash flows from operating activities: | | | | | | | | |
| Net (loss) income | -83.7 | -200.1 | -200.1 | -33.5 | -2.4 | 16.1 | -15.3 | -15.3 |
| Adjustments to reconcile net (loss) income to net cash (used in) from operating activities: | | | | | | | | |
| Depreciation and amortization expense | 7.0 | 7.9 | 7.9 | 8.3 | 8.5 | 8.5 | 10.2 | 10.2 |
| Reorganization items, net | | | | | | | | |
| Amortization of debt costs | 5.1 | 16.8 | | 4.3 | 4.1 | 4.4 | 8.0 | |
| Stock-based compensation | 0.5 | 1.4 | 1.4 | 0.2 | 1.4 | 1.7 | 1.3 | 1.3 |
| Long-lived asset impairments and other store closing costs | 20.2 | 157.5 | | | | | | |
| Deferred income tax benefit | -13.7 | -47.7 | -47.7 | | | -0.8 | -5.1 | -5.1 |
| Other | 0.0 | -2.1 | | | | -0.4 | 0.0 | |
| Changes in assets and liabilities: | | | | | | | | |
| Decrease (increase) in receivables | 2.7 | 17.8 | 17.8 | 0.5 | -0.5 | 8.2 | -12.6 | -12.6 |
| Decrease (increase) in inventory | 70.6 | 17.6 | 17.6 | 8.3 | 10.4 | 6.2 | -6.9 | -6.9 |
| Decrease (increase) in prepaid and other current assets | -4.4 | -8.4 | -8.4 | -10.3 | -1.7 | 4.5 | -3.7 | -3.7 |
| Increase (decrease) in accounts payable | -55.1 | 3.3 | 3.3 | -4.3 | 23.9 | -32.8 | 57.7 | 57.7 |
| Increase (decrease) in deferred revenue and accrued liabilities | 75.8 | -22.7 | | 9.5 | -3.4 | -4.7 | 4.4 | |
| Other operating activities | -3.2 | 1.5 | | -4.0 | -0.7 | -0.6 | 3.6 | |
| Net cash (used in) provided by operating activities | 8.6 | -12.1 | -12.1 | -1.1 | 32.3 | -3.4 | 68.7 | 68.7 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | -2.1 | -3.9 | | -4.2 | -4.5 | -3.4 | -3.0 | |
| Proceeds from net asset exchange | | 18.2 | | -96.8 | -3.5 | | 101.0 | |
| Deconsolidation of GNC Canada | -4.3 | | | | | | | |
| Net cash (used in) provided by investing activities | -15.2 | 14.5 | 14.5 | -3.9 | -5.7 | -2.6 | 85.6 | 85.6 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Borrowings under revolving credit facility | 30.0 | 30.0 | | | | | 22.0 | |
| Payments on revolving credit facility | -60.0 | | | | | -24.7 | -22.0 | |
| Proceeds from the issuance of convertible preferred stock | | | | | | | 200.0 | |
| Payments on term loan facility | | | | | | | | |
| Original issuance discount and revolving credit facility fees | | | | | | | -10.4 | |
| Minimum tax withholding requirements | 0.0 | -0.1 | | | 0.0 | -0.1 | -0.1 | |
| Net cash used in financing activities | -33.2 | 18.2 | 18.2 | | 0.0 | -34.8 | -84.4 | -84.4 |
| |
| Non-cash investing activities: | | | | | | | | |