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Marketable Securities - Schedule of Marketable Securities and Fair Value Measurements (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | $ 75.1 | $ 2.6
Marketable securities, noncurrent | 1.2 | 3.3
Fixed Income Securities |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | 73.3 | 2.6
Marketable securities, noncurrent | 1.2 | 1.3
Mutual Funds |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | 1.8 |
Marketable securities, noncurrent |  | 2.0
Quoted Prices in Active Markets (Level 1) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | 1.8 |
Marketable securities, noncurrent |  | 2.0
Quoted Prices in Active Markets (Level 1) | Mutual Funds |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | 1.8 |
Marketable securities, noncurrent |  | 2.0
Significant Other Observable Inputs (Level 2) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | 73.3 |
Marketable securities, noncurrent |  | 1.3
Significant Other Observable Inputs (Level 2) | Fixed Income Securities |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities, current | 73.3 | 2.6
Marketable securities, noncurrent | $ 1.2 | $ 1.3

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