Debt Investment Maturities (Detail) $ in Millions	Mar. 31, 2023 USD ($)
Adjusted Cost Basis
Due in one year or less	$ 34,947
Due after one year through five years	48,237
Due after five years through 10 years	14,143
Due after 10 years	1,373
Debt investments, Adjusted Cost Basis	98,700
Estimated Fair Value
Due in one year or less	34,805
Due after one year through five years	46,168
Due after five years through 10 years	12,698
Due after 10 years	1,260
Total	$ 94,931