| In millions, except per share items | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 | Mar-31-20 |
| | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Net income | -3.0 | -106.0 | -195.0 | -245.0 | -101.0 | 105.0 | 166.0 | 88.0 |
| Depreciation and amortization | 154.0 | 224.0 | 227.0 | 232.0 | 153.0 | 92.0 | 96.0 | 178.0 |
| Stock-based compensation | 5.0 | 3.0 | 3.0 | 4.0 | | 7.0 | 8.0 | 12.0 |
| Deferred taxes | -3.0 | -52.0 | -44.0 | -49.0 | -9.0 | -77.0 | -69.0 | -66.0 |
| Change in working capital [+] | 38.0 | 160.0 | 122.0 | 89.0 | 2.0 | -178.0 | -166.0 | -152.0 |
| Accounts receivable | -23.0 | -6.0 | -11.0 | 48.0 | 32.0 | 58.0 | 54.0 | 22.0 |
| Inventories | 92.0 | 168.0 | 200.0 | 119.0 | 79.0 | 10.0 | 1.0 | 44.0 |
| Accounts payable | 13.0 | 9.0 | -37.0 | -45.0 | -64.0 | -66.0 | | -49.0 |
| Other | -44.0 | -11.0 | -30.0 | -33.0 | -45.0 | -180.0 | -183.0 | -169.0 |
| Other operating activities | -11.0 | -29.0 | -16.0 | -17.0 | -112.0 | 8.0 | 8.0 | 34.0 |
| Cash from operations | 180.0 | 200.0 | 97.0 | 14.0 | -62.0 | -43.0 | 43.0 | 94.0 |
| |
| Capital expenditures [+] | -66.0 | -43.0 | -29.0 | -30.0 | -48.0 | -72.0 | -103.0 | -109.0 |
| Purchases of property and equipment | -66.0 | -43.0 | -29.0 | -30.0 | -48.0 | -72.0 | -103.0 | -109.0 |
| Sales of property and equipment | 2.0 | | | 7.0 | 6.0 | 1.0 | | |
| Other cash from investing | | 29.0 | 21.0 | 4.0 | 345.0 | 338.0 | | 340.0 |
| Cash from investing | -42.0 | -8.0 | -1.0 | -19.0 | 303.0 | 267.0 | 238.0 | 232.0 |
| |
| Cash dividends paid | -12.0 | -12.0 | -114.0 | -114.0 | -111.0 | -108.0 | -3.0 | |
| Repurchase of common stock, net | -80.0 | -86.0 | -74.0 | -37.0 | -34.0 | | -27.0 | -10.0 |
| Other cash from financing | -11.0 | -1.0 | 0.0 | -2.0 | | | -49.0 | |
| Cash from financing | -103.0 | -99.0 | -188.0 | -153.0 | -146.0 | -157.0 | -79.0 | -56.0 |
| |
| Free cash flow | 114.0 | 157.0 | 68.0 | -16.0 | -110.0 | -115.0 | -60.0 | -15.0 |
| Per share (diluted) | $3.62 | $4.86 | $2.04 | ($0.47) | ($3.19) | ($3.32) | ($1.71) | ($0.43) |
| |
| Cash paid for interest | | | 1.0 | | | | | |