|
FAIR VALUE - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Mar. 31, 2012
|
Dec. 31, 2011
|
Mar. 31, 2011
|
Dec. 31, 2010
|
|
| Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | ||||||||
| Transfers between Level 1 and Level 2 | $ 0 | $ 0 | $ 0 | $ 0 | ||||
| Level 3 assets fair value | 40 | 52 | 40 | 52 | 40 | 41 | 65 | 66 |
| Upper limit percentage of Level 3 assets to total invested assets | 0.50% | 0.50% | ||||||
| Long-term debt, carrying value | 1,618 | 1,618 | 1,659 | |||||
| Long-term debt, fair value | $ 1,867 | $ 1,867 | $ 1,834 | |||||