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CASH AND INVESTMENTS - Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Cost | ||
| Due in one year or less | $ 37 | |
| Due after one year through three years | 251 | |
| Due after three years through five years | 49 | |
| Due after five years | 248 | |
| Marketable Securities, Debt Maturities, Amortized Cost, Total | 585 | |
| Equity securities | 2 | |
| Marketable Securities, Amortized Cost, Total | 587 | |
| Estimated Fair Value | ||
| Due in one year or less | 37 | |
| Due after one year through three years | 252 | |
| Due after three years through five years | 49 | |
| Due after five years | 257 | |
| Marketable Securities, Debt Maturities, Fair Value, Total | 595 | |
| Equity securities | 2 | |
| Estimated Fair Value | 597 | |
|
Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 779 | 1,475 |
|
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 256 | 204 |
|
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 360 | 1,054 |
|
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 163 | 217 |
|
Marketable securities | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 597 | 1,241 |
|
Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 237 | 187 |
|
Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 360 | 1,054 |
|
Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Other Long-term Investments | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 182 | 234 |
|
Other Long-term Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 19 | 17 |
|
Other Long-term Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Other Long-term Investments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 163 | 217 |
|
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 238 | 187 |
|
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 237 | 187 |
|
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 1 | 0 |
|
U.S. government and agency debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 174 | 191 |
|
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 174 | 191 |
|
Mortgage and asset-backed debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 163 | 837 |
|
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 163 | 837 |
|
Corporate debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
U.S. state and local municipal debt securities | Marketable securities | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 15 | 15 |
|
U.S. state and local municipal debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
U.S. state and local municipal debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 15 | 15 |
|
U.S. state and local municipal debt securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Other debt and equity securities | Marketable securities | Fair Value, Measurements, Recurring
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 7 | 11 |
|
Other debt and equity securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 0 | 0 |
|
Other debt and equity securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | 7 | 11 |
|
Other debt and equity securities | Marketable securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
|
||
| Investments Classified by Contractual Maturity Date [Line Items] | ||
| Investments, Fair Value Disclosure | $ 0 | $ 0 |