Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Short-Term Investments - Cash, Cash Equivalents and Short-term Investments Amortized Cost, Unrealized Gains and Losses and Estimated Fair Value (Details)

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Cash, Cash Equivalents and Short-Term Investments - Cash, Cash Equivalents and Short-term Investments Amortized Cost, Unrealized Gains and Losses and Estimated Fair Value (Details) - U.S. Treasury securities - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Amortized cost $ 518 $ 841
Unrealized losses 0 (2)
Fair value $ 518 $ 839