Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
- Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Cost    
Marketable Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis $ 118  
Due after one year through three years 328  
Due after three years through five years 6  
Marketable Securities, Debt Maturities, After Five Years, Amortized Cost Basis 43  
Marketable Securities, Debt Maturities, Amortized Cost, Total 495  
Equity securities 2  
Marketable Securities, Amortized Cost, Total 497 $ 813
Estimated Fair Value    
Due in one year or less 118  
Due after one year through three years 332  
Due after three years through five years 6  
Due after five years 45  
Marketable Securities, Debt Maturities, Fair Value, Total 501  
Equity securities 2  
Marketable securities 503 810
Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 525 831
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 214 316
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 310 513
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 1 2
Marketable securities | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 503 810
Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 193 297
Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 310 513
Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Other Long-term Investments | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 22 21
Other Long-term Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 21 19
Other Long-term Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Other Long-term Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 1 2
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 193 297
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 193 297
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 47 81
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 47 81
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 245 410
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 245 410
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Equity securities | Marketable securities | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 2 2
Equity securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Equity securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 2 2
Equity securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Non-U.S. government debt securities | Marketable securities | Fair Value, Measurements, Recurring    
Estimated Fair Value    
Investments, Fair Value Disclosure 16 20
Non-U.S. government debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1    
Estimated Fair Value    
Investments, Fair Value Disclosure 0 0
Non-U.S. government debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Estimated Fair Value    
Investments, Fair Value Disclosure 16 20
Non-U.S. government debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3    
Estimated Fair Value    
Investments, Fair Value Disclosure $ 0 $ 0