Quarterly report pursuant to Section 13 or 15(d)

CASH AND INVESTMENTS - Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail)

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CASH AND INVESTMENTS - Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Cost    
Due in one year or less $ 35  
Due after one year through three years 310  
Due after three years through five years 0  
Due after five years 0  
Marketable Securities, Debt Maturities, Amortized Cost, Total 345  
Equity securities 2  
Total Amortized Cost 347 $ 398
Estimated Fair Value    
Due in one year or less 36  
Due after one year through three years 313  
Due after three years through five years 0  
Due after five years 0  
Marketable Securities, Debt Maturities, Fair Value, Total 349  
Equity securities 2  
Total Estimated Fair Value $ 351 $ 406