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
Sep. 30, 2019
Dec. 31, 2018
Cost    
Due in one year or less $ 121  
Due after one year through three years 318  
Due after three years through five years 7  
Due after five years 44  
Marketable Securities, Debt Maturities, Amortized Cost, Total 490  
Equity securities 2  
Total Amortized Cost 492 $ 813
Estimated Fair Value    
Due in one year or less 121  
Due after one year through three years 321  
Due after three years through five years 8  
Due after five years 46  
Marketable Securities, Debt Maturities, Fair Value, Total 496  
Equity securities 2  
Total Estimated Fair Value $ 498 $ 810