|
Weighted-Average Assumptions used to Determine Benefit Obligations (Detail)
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|
|
Pension Benefits
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 4.17% | 4.60% |
| Rate of compensation increase | 3.56% | 4.41% |
|
Other Benefits
|
||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 4.03% | 4.29% |
| Rate of compensation increase |
| X | ||||||||||
|
- Definition
The interest rate used to adjust for the time value of money for the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Expected rate of compensation increases (for pay-related plans). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|