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Postretirement Benefits (Tables)
 3 Months Ended
Jan. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Net Benefit Costs [Table Text Block]
Net postretirement benefits expense included in our Consolidated Statements of Operations is comprised of the following:
 
Three Months Ended January 31,
 
Pension
Benefits
 
Health and Life 
Insurance Benefits
(in millions)
2013
 
2012
 
2013
 
2012
Service cost for benefits earned during the period
$
5

 
$
4

 
$
2

 
$
1

Interest on obligation
36

 
43

 
15

 
21

Amortization of cumulative loss
32

 
28

 
7

 
9

Amortization of prior service benefit
—

 
—

 
(1
)
 
(1
)
Contractual termination benefits
—

 
—

 
—

 
(2
)
Expected return on assets
(47
)
 
(48
)
 
(8
)
 
(9
)
Net postretirement benefits expense
$
26

 
$
27

 
$
15

 
$
19