Postretirement Benefits Changes In Level 3 Plan Assets (Details) (USD $) In Millions, unless otherwise specified																			12 Months Ended
	Oct. 31, 2011 Pension [Member]	Oct. 31, 2010 Pension [Member]	Oct. 31, 2009 Pension [Member]	Oct. 31, 2011 Other Postretirement Benefit Plans [Member]	Oct. 31, 2010 Other Postretirement Benefit Plans [Member]	Oct. 31, 2009 Other Postretirement Benefit Plans [Member]	Oct. 31, 2011 Hedge Funds [Member] Pension [Member]	Oct. 31, 2010 Hedge Funds [Member] Pension [Member]	Oct. 31, 2011 Hedge Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2010 Hedge Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2011 Private Equity Funds [Member] Pension [Member]	Oct. 31, 2010 Private Equity Funds [Member] Pension [Member]	Oct. 31, 2011 Private Equity Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2010 Private Equity Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2011 Real Estate [Member] Pension [Member]	Oct. 31, 2010 Real Estate [Member] Pension [Member]	Oct. 31, 2011 Unallocated Insurance Contract [Member] Pension [Member]	Oct. 31, 2010 Unallocated Insurance Contract [Member] Pension [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Pension [Member]	Oct. 31, 2010 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Pension [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2010 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member] Private Equity Funds [Member] Pension [Member]	Oct. 31, 2010 Fair Value, Inputs, Level 3 [Member] Private Equity Funds [Member] Pension [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member] Private Equity Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2010 Fair Value, Inputs, Level 3 [Member] Private Equity Funds [Member] Other Postretirement Benefit Plans [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member] Real Estate [Member] Pension [Member]	Oct. 31, 2010 Fair Value, Inputs, Level 3 [Member] Real Estate [Member] Pension [Member]	Oct. 31, 2011 Fair Value, Inputs, Level 3 [Member] Unallocated Insurance Contract [Member] Pension [Member]	Oct. 31, 2010 Fair Value, Inputs, Level 3 [Member] Unallocated Insurance Contract [Member] Pension [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 2,392	$ 2,479	$ 2,317	$ 463	$ 509	$ 473	$ 99	$ 102	$ 25	$ 25	$ 75	$ 57	$ 19	$ 14	$ 1	$ 1	$ 0	$ 120	$ 102	$ 140	$ 25	$ 33	$ 57	$ 35	$ 14	$ 9	$ 1	$ 1	$ 120	$ 110
Unrealized gains																			(21)	10	(4)	2	15	11	4	2	0	0	0	10
Realized gains (losses)																			19	1			0	0			0	0	1	0
Purchases, issuances, and settlements																			(1)	(49)	4	(10)	3	11	1	3	0	0	(121)	0
Fair value of plan assets at end of year	$ 2,392	$ 2,479	$ 2,317	$ 463	$ 509	$ 473	$ 99	$ 102	$ 25	$ 25	$ 75	$ 57	$ 19	$ 14	$ 1	$ 1	$ 0	$ 120	$ 99	$ 102	$ 25	$ 25	$ 75	$ 57	$ 19	$ 14	$ 1	$ 1	$ 0	$ 120