| In millions, except per share items | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 8-K | 10-Q | 10-Q | 10-K | 8-K | 10-Q | 10-Q | 10-K |
| CASH FLOWS FROM OPERATING ACTIVITIES: | | | | | | | | |
| Net loss | | -11.0 | -36.8 | | | -4.9 | -21.0 | |
| Adjustments to reconcile net (loss) income to net cash used in operating activities: | | | | | | | | |
| Equity in earnings from unconsolidated entities | | -0.6 | 1.0 | -6.2 | | -12.1 | 3.6 | -42.4 |
| Return on investment from Gateway Commercial Venture | | | | | | | | |
| Deferred income taxes | | | | | | | | |
| Depreciation and amortization | | 1.4 | 1.6 | | | 4.1 | 9.3 | |
| Gain on distribution from indirect Legacy Interest in Great Park Venture—related party | | | | -1.0 | | -1.0 | | |
| Share-based compensation | | 0.7 | 4.1 | | | 1.1 | 1.3 | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Inventories | | -42.4 | -47.5 | -104.1 | | -59.9 | -52.1 | -99.2 |
| Related party assets | | -0.8 | 2.8 | -0.4 | | 17.0 | -5.0 | -10.0 |
| Other assets | | -0.2 | -0.4 | -1.3 | | -1.7 | 2.9 | -0.1 |
| Accounts payable and other liabilities | | -20.8 | 6.3 | -18.3 | | -7.0 | 8.9 | -32.3 |
| Related party liabilities | | -1.8 | 10.8 | | | -0.9 | -0.3 | -1.3 |
| Net cash used in operating activities | | -75.6 | -58.0 | -81.4 | | -65.3 | -52.5 | -78.5 |
| |
| CASH FLOWS FROM INVESTING ACTIVITIES: | | | | | | | | |
| Return of investment | | | | | | | | |
| Contribution to Valencia Landbank Venture | | | | | | | | |
| Distribution from indirect Legacy Interest in Great Park Venture—related party | | | | | | 1.0 | | |
| Purchase of properties and equipment | | -0.1 | | -0.2 | | 0.0 | -0.1 | -2.1 |
| Net cash provided by investing activities | | 0.9 | 0.5 | | | 78.0 | 0.0 | |
| |
| CASH FLOWS FROM FINANCING ACTIVITIES: | | | | | | | | |
| Reacquisition of share-based compensation awards for tax-withholding purposes | | | -2.7 | -2.0 | | | -2.0 | -5.5 |
| Payment of financing costs | | | | -0.7 | | -0.7 | | |
| Related party reimbursement obligation | | -1.2 | -1.2 | -19.4 | | -4.9 | -11.0 | -13.5 |
| Tax distribution to noncontrolling interest | | | -0.4 | -4.4 | | -0.3 | -2.9 | -4.6 |
| Net cash used in financing activities | | -1.2 | -4.3 | -26.6 | | -5.8 | -15.9 | -23.5 |
| NET DECREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH | | | | -32.7 | | | | -49.1 |