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Fair Value Measurements and Investments - Summarizes the Types of Holdings and Related Values (Details) - Corporate Debt Securities [Member] $ in Millions	Sep. 30, 2025 USD ($)
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost basis	$ 50
Allowance for credit losses	0
Net carrying amount	50
Gross unrealized gains	1
Gross unrealized losses	0
Aggregate fair value	$ 51

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Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity).

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