Employee Benefit Plans % of Total (Details)	Oct. 31, 2011	Oct. 31, 2010
Cash [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	2.00%	1.00%
Cash [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	3.00%
US Treasuries [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	4.00%	12.00%
US Treasuries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	10.00%	10.00%
Long Duration Bonds [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	26.00%	26.00%
Corporate Bonds [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	9.00%	6.00%
High Yield Bonds [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
Collateralized Mortgage Backed Securities [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	1.00%
Municipals [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	0.00%
Derivatives [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	0.00%	1.00%
Large Cap Core Index [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	4.00%	5.00%
Large Cap Value [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	3.00%	5.00%
Large Cap Value [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
Large Cap Growth [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	6.00%	5.00%
Large Cap Growth [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
Small Cap [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	9.00%	9.00%
Small Cap Value [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
Small Cap Growth [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
International Value [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	6.00%	7.00%
International Growth [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	7.00%	8.00%
Large Cap Index [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	9.00%	10.00%
International Blend [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	16.00%	17.00%
Corporate Bonds Asset Backed Securities [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	35.00%	35.00%
Global Reit [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	6.00%	5.00%
Global Reit [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
Hedge Funds [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	6.00%	5.00%
Private Equity Funds [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	1.00%	0.00%
Commodities [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%
Total Assets Fair Value [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	100.00%	100.00%
Total Assets Fair Value [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	100.00%	100.00%
Total Equity Securities | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	35.00%	39.00%
Total Equity Securities | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	45.00%	47.00%
Total Real Estate [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	6.00%	5.00%
Total Real Estate [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	5.00%	5.00%
Total Other Investments [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	12.00%	5.00%
Total Fixed Income Securities [Member] | Qualified Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	45.00%	50.00%
Total Fixed Income Securities [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
% of Total	45.00%	45.00%