| In millions, except per share items | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities: | | | | | | | | |
| Net (loss) income | -35.1 | 69.8 | -150.3 | -285.2 | 219.3 | 255.9 | 265.0 | 240.2 |
| Adjustments to reconcile net (loss) income to net cash (used in) from operating activities: | | | | | | | | |
| Depreciation and amortization expense | 35.4 | 47.1 | 56.8 | 60.0 | 57.2 | 56.3 | 51.8 | 49.3 |
| Reorganization items, net | | | | | | | | |
| Amortization of debt costs | 20.8 | 23.2 | 13.2 | 12.7 | 6.4 | 1.7 | | |
| Stock-based compensation | 4.6 | 6.8 | 8.4 | 8.8 | 6.3 | 5.9 | 7.8 | |
| Long-lived asset impairments and other store closing costs | | 38.2 | 457.8 | 476.6 | 28.3 | | | |
| Deferred income tax benefit | 20.6 | -23.3 | -191.6 | -30.4 | 0.5 | -6.4 | -1.8 | |
| Other | | | | | | | | |
| Changes in assets and liabilities: | | | | | | | | |
| Decrease (increase) in receivables | -4.4 | -1.4 | -0.4 | 11.1 | 0.4 | 9.8 | -13.8 | -16.7 |
| Decrease (increase) in inventory | 18.0 | 16.8 | 72.9 | -32.7 | 5.4 | -24.1 | -54.4 | -80.0 |
| Decrease (increase) in prepaid and other current assets | -11.1 | 14.7 | -5.5 | -12.9 | 0.8 | 2.3 | 2.5 | 4.0 |
| Increase (decrease) in accounts payable | 44.5 | -3.4 | -24.0 | 27.0 | 22.4 | -9.0 | 6.6 | 0.7 |
| Increase (decrease) in deferred revenue and accrued liabilities | | | | | 9.8 | 12.5 | -27.9 | 16.4 |
| Other operating activities | -1.7 | -4.9 | 4.8 | 2.2 | 5.3 | 8.9 | -1.2 | -6.5 |
| Net cash (used in) provided by operating activities | 96.5 | 95.9 | 220.5 | 208.2 | 354.5 | 303.8 | 239.4 | 223.0 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | -15.2 | -19.0 | -32.1 | -59.6 | -45.8 | -70.5 | -50.2 | -41.9 |
| Proceeds from net asset exchange | 2.4 | 2.5 | 2.0 | 39.2 | 3.4 | 3.6 | | |
| Net cash (used in) provided by investing activities | 73.4 | -16.5 | -23.8 | -22.4 | -45.6 | -75.5 | -78.3 | -43.2 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Borrowings under revolving credit facility | 22.0 | 410.0 | 317.5 | 234.5 | 43.0 | | | |
| Payments on revolving credit facility | -46.7 | -410.0 | -444.5 | -150.5 | -169.1 | -5.4 | -3.4 | -2.7 |
| Proceeds from the issuance of convertible preferred stock | 200.0 | 100.0 | | | | | | |
| Payments on term loan facility | | | | | -169.1 | -5.4 | | |
| Original issuance discount and revolving credit facility fees | -10.4 | -35.2 | | | | | | |
| Minimum tax withholding requirements | -0.2 | -0.3 | -0.3 | -1.2 | -0.6 | -0.8 | -1.3 | |
| Net cash used in financing activities | -119.3 | -75.8 | -168.1 | -207.5 | -384.5 | -321.0 | -94.3 | -149.3 |
| |
| Non-cash investing activities: | | | | | | | | |