| In millions, except per share items | Dec-31-21 | Dec-31-20 |
| | 10-K | 10-K |
| Revenue | 8.6 | 5.4 |
| Revenue growth | 59.3% | |
| Operating Expenses [Abstract] | | |
| Operating expenses: | | |
| Cost of revenue | 112.9 | 71.9 |
| Operations and technology | 92.0 | 65.8 |
| General and administrative | 57.9 | 34.3 |
| Total operating expenses | 262.8 | 172.0 |
| Loss from operations | -181.8 | -111.6 |
| Operating margin | -2114.5% | -2067.2% |
| Loss on convertible loans | -27.3 | -42.9 |
| Interest expense | -8.5 | -2.0 |
| Interest income | 0.0 | 0.3 |
| Other expense, net | -3.0 | -1.4 |
| Loss before provision for income taxes | -220.7 | -157.7 |
| Provision for income taxes | -0.1 | 0.1 |
| Net loss | -220.6 | -157.8 |
| |
| Other comprehensive loss, net of tax | | |
| Cumulative translation adjustment | -0.2 | 0.7 |
| Total comprehensive loss | -220.8 | -157.1 |
| |
| Weighted-average common shares outstanding-basic | 47.4 | 21.3 |