| In millions, except per share items | Mar-31-18 | Dec-31-17 | Sep-30-17 | Jun-30-17 | Mar-31-17 | Dec-31-16 | Sep-30-16 | Jun-30-16 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | -501.8 | -469.3 | -447.8 | -577.8 | -560.1 | -472.0 | -181.0 | 34.1 |
| Depreciation and amortization | 101.7 | 109.4 | 110.6 | 105.9 | 98.4 | 88.3 | 83.1 | 75.3 |
| Stock-based compensation | 24.1 | 26.3 | 28.5 | 29.7 | 31.9 | 32.2 | 30.1 | 30.7 |
| Change in working capital [+] | 63.4 | 66.0 | 93.7 | 136.9 | 59.7 | 64.1 | -35.7 | 11.3 |
| Accounts receivable | -15.7 | 12.6 | 2.6 | 22.8 | 7.8 | 26.8 | -59.1 | -44.5 |
| Inventories | 28.3 | 6.7 | -6.0 | -44.4 | -51.5 | -45.6 | -41.0 | -32.2 |
| Other current assets | -67.6 | -65.6 | -0.8 | -8.4 | -5.5 | -0.6 | -40.4 | 23.9 |
| Other | 118.4 | 112.4 | 97.8 | 166.9 | 108.9 | 83.4 | 109.0 | |
| Cash from operations | -41.1 | 84.2 | 26.6 | 113.5 | 44.8 | 83.9 | 161.4 | 153.6 |
| |
| Capital expenditures [+] | -22.0 | -26.7 | -41.7 | -47.9 | -47.2 | -49.4 | -42.4 | -37.2 |
| Purchases of property and equipment | -22.0 | -26.7 | -41.7 | -47.9 | -47.2 | -49.4 | -42.4 | -37.2 |
| Sales of property and equipment | 39.2 | 21.5 | 9.1 | 0.4 | | 1.4 | | 56.9 |
| Purchases of intangible assets | | -0.1 | | | | | | |
| Acquisitions | | -0.1 | | | | | -585.8 | |
| Other cash from investing | | -4.2 | | 7.6 | 10.8 | 10.3 | | 10.3 |
| Cash from investing | 12.3 | -9.7 | -25.0 | -625.7 | -620.9 | -627.1 | -620.4 | 31.9 |
| |
| Option exercises | 1.7 | 1.4 | 0.9 | 0.7 | 1.7 | 9.2 | 9.7 | 15.3 |
| Financing costs | | | | | -12.7 | | -11.9 | |
| Other cash from financing | -21.3 | -73.1 | -76.5 | 303.5 | 308.8 | 379.9 | 369.6 | 6.0 |
| Cash from financing | -23.1 | -73.7 | -76.6 | 315.5 | 319.8 | 382.5 | 371.8 | -8.8 |
| |
| Free cash flow | -63.1 | 57.5 | -15.1 | 65.6 | -2.4 | 34.4 | 119.1 | 116.4 |
| Per share (diluted) | ($0.88) | $0.80 | ($0.21) | $0.92 | ($0.03) | $0.48 | $1.67 | $1.62 |
| |
| Cash paid for interest | 28.9 | 28.4 | 27.9 | 25.9 | 22.0 | 18.1 | 13.7 | 11.5 |
| Cash paid for income taxes | 1.8 | 2.9 | 3.4 | 4.9 | 24.1 | 23.1 | 41.8 | 41.3 |