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Schedule II - Condensed Balance Sheets Parent Company (Parenthetical) (Detail) - $ / shares shares in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Condensed Balance Sheet Statements Captions [Line Items] |  |
Preferred stock, par value | $ 0.00001 | $ 0.00001
Preferred stock, shares authorized | 0.5 | 0.5
Preferred stock, outstanding | 0.0 | 0.0
Common stock, par value | $ 0.00001 | $ 0.00001
Common stock, shares authorized | 300.0 | 300.0
Common stock, shares outstanding | 103.2 | 109.7
Parent Company |  |
Condensed Balance Sheet Statements Captions [Line Items] |  |
Preferred stock, par value | $ 0.00001 | $ 0.00001
Preferred stock, shares authorized | 0.5 | 0.5
Preferred stock, outstanding | 0.0 | 0.0
Common stock, par value | $ 0.00001 | $ 0.00001
Common stock, shares authorized | 300.0 | 300.0
Common stock, shares outstanding | 103.2 | 109.7

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