| In millions, except per share items | Dec-31-22 | Dec-05-22 | Dec-31-21 | Dec-05-21 |
| | 10-K | 8-K | 10-K | 8-K |
| Cash flows from operating activities | | | | |
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| Adjustments to reconcile net loss to net cash used in operating activities: | | | | |
| Changes in operating assets and liabilities: | | | | |
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| Cash flows from investing activities | | | | |
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| Cash flows from financing activities | | | | |
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| Supplemental disclosure of cash flow information | | | | |
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| Supplemental disclosure of noncash investing and financing activities | | | | |
| Accrued interest exchanged for convertible promissory notes | | | | |