Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail) - USD ($) $ in Millions |
Sep. 30, 2015 |
Dec. 31, 2014 |
---|---|---|
Cost | ||
Due in one year or less | $ 1,423 | |
Due after one year through three years | 420 | |
Due after three years through five years | 14 | |
Due after five years | 71 | |
Marketable Securities, Debt Maturities, Amortized Cost, Total | 1,928 | |
Equity securities | 282 | |
Total Amortized Cost | 2,210 | $ 992 |
Estimated Fair Value | ||
Due in one year or less | 1,423 | |
Due after one year through three years | 421 | |
Due after three years through five years | 15 | |
Due after five years | 71 | |
Marketable Securities, Debt Maturities, Fair Value, Total | 1,930 | |
Equity securities | 318 | |
Total Estimated Fair Value | $ 2,248 | $ 992 |
X | ||||||||||
- Definition Marketable Securities, Fair Value [Abstract] No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Amortized Cost [Abstract] No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, After Five Years, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, After Five Years, Fair Value No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, After One Through Three Years, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, After One Through Three Years, Fair Value No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, After Three Through Five Years, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, After Three Through Five Years, Fair Value No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, Fair Value No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Debt Maturities, Next Twelve Months, Fair Value No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Equity Securities, Amortized Cost Basis No definition available.
|
X | ||||||||||
- Definition Marketable Securities, Equity Securities, Fair Value No definition available.
|
X | ||||||||||
- Definition Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|