XML 119 R88.htm IDEA: XBRL DOCUMENT v2.4.0.6
Post Retirement Benefit Plans - Summary of Healthcare Cost Trend Rates on Gross Eligible Charges (Detail) (Pension Plans, Defined Benefit [Member])
12 Months Ended
Oct. 31, 2012
Pension Plans, Defined Benefit [Member]
 
Pension Plans, Postretirement and Other Employee Benefits [Line Items]  
Current trend rate 7.20%
Ultimate trend rate 5.20%
Year ultimate trend rate reached 2018