| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 71 | 128 | 112 | 153 | 125 | 160 | 124 |
| Depreciation and amortization [+] | 34 | 35 | 34 | 24 | 21 | 17 | 14 |
| Depreciation | 34 | 35 | 34 | 24 | 21 | 17 | 8 |
| Amortization of intangible assets | | | | | | | 6 |
| Stock-based compensation | | | | | | | 4 |
| Deferred taxes | | | | | | | 1 |
| Change in working capital [+] | | -9 | | | 9 | | -31 |
| Accounts receivable | | | | | | | -40 |
| Other current assets | | | | | | | 6 |
| Accrued expenses | | | | | | | 3 |
| Other | | -9 | | | 9 | | |
| Other operating activities | 37 | 31 | 61 | 23 | 34 | 17 | 43 |
| Cash from operations | 142 | 185 | 207 | 200 | 189 | 194 | 155 |
| |
| Capital expenditures | 40 | 31 | 32 | 22 | 27 | 15 | -11 |
| Purchases of property and equipment | 40 | 31 | 32 | 22 | 27 | 15 | -11 |
| Acquisitions | | | 5 | 38 | | | -87 |
| Sales of short-term investments, net [+] | | | 20 | 25 | 79 | 140 | 92 |
| Purchases of short-term investments | | | 2 | 7 | 15 | 44 | -6 |
| Sales of short-term investments | | | 18 | 18 | 64 | 96 | 98 |
| Other cash from investing | -75 | -62 | -88 | -146 | -116 | -166 | -49 |
| Cash from investing | -35 | -31 | -31 | -61 | -10 | -11 | -55 |
| |
| Cash dividends paid | | | | | | | -87 |
| Repurchase of common stock, net | -59 | -103 | | | | | |
| Financing costs | | 8 | | | 16 | | |
| Other cash from financing | -18 | -378 | -7 | -7 | -149 | -68 | -1 |
| Cash from financing | -77 | -489 | -7 | -7 | -165 | -68 | -88 |
| |
| Free cash flow | 182 | 216 | 239 | 222 | 216 | 209 | 144 |
| Per share (diluted) | $2.22 | $2.53 | $2.80 | $2.61 | $2.55 | $2.47 | $1.70 |
| |
| Cash paid for interest | 29 | 46 | 55 | 59 | 13 | | |