XML 23 R112.htm IDEA: XBRL DOCUMENT

Retirement Benefits (Assumed heathcare trend rates) (Details)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Healthcare trend rate	8.00%	8.00%
Ultimate trend rate	5.00%	5.00%
Year the ultimate trend rate is reached	2019	2015

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