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Debt Investment Maturities (Detail)
$ in Millions
Mar. 31, 2020
USD ($)
Cost Basis  
Due in one year or less $ 39,008
Due after one year through five years 48,552
Due after five years through 10 years 35,789
Due after 10 years 1,962
Debt investments, Cost Basis 125,311
Estimated Fair Value  
Due in one year or less 39,109
Due after one year through five years 51,106
Due after five years through 10 years 39,458
Due after 10 years 2,147
Total $ 131,820