Fair Value Measurements - Summary of Gross Holding Losses and Fair Value of Held-to-Maturity Securities (Parenthetical) (Details)	12 Months Ended
Dec. 31, 2019
U.S. Treasury Bills
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Held-to-maturity security maturity date	Mar. 12, 2020

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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