XML 85 R94.htm IDEA: XBRL DOCUMENT

Assumed Health Care Cost Trend Rates (Detail)	12 Months Ended
Assumed Health Care Cost Trend Rates (Detail)	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care cost trend rate assumed for next year	7.00%	7.50%
Rate to which the cost trend is assumed to decline (ultimate trend rate)	5.00%	5.00%
Year the rate reaches the ultimate trend rate	2017	2017

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References+ Details