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PROPERTY AND EQUIPMENT, NET - Former headquarters location (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Property and Equipment, Net |  |
Property held and used | $ 112.1 | $ 108.2
Land | 2.3 | 2.3
Property and equipment | 112.1 | $ 108.2
Former Chicago Headquarters Location |  |
Property and Equipment, Net |  |
Property held and used | 9.3 |
Land | 2.3 |
Property and equipment | $ 7.0 |

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