Debt Investment Maturities (Detail) $ in Millions	Mar. 31, 2024 USD ($)
Adjusted Cost Basis
Due in one year or less	$ 19,613
Due after one year through five years	42,885
Due after five years through 10 years	9,230
Due after 10 years	1,385
Debt investments, Adjusted Cost Basis	73,113
Estimated Fair Value
Due in one year or less	19,428
Due after one year through five years	40,676
Due after five years through 10 years	8,304
Due after 10 years	1,266
Total	$ 69,674