|
Taxes on Income - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2012
|
|
| Income Taxes [Line Items] | |
| Possible reduction of income tax expense from continuing operations, net of federal tax benefit, if uncertain tax matters are resolved in favor of the company | $ 8 |