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Postretirement Benefits (Tables)
 6 Months Ended
Apr. 30, 2014
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 April 30,
 
Six Months Ended April 30,
 
Pension Benefits
 
Health and Life
Insurance Benefits
 
Pension Benefits
 
Health and Life
Insurance Benefits
(in millions)
2014
 
2013
 
2014
 
2013
 
2014
 
2013
 
2014
 
2013
Service cost for benefits earned during the period
$
2

 
$
5

 
$
1

 
$
2

 
$
6

 
$
10

 
$
2

 
$
4

Interest on obligation
40

 
36

 
17

 
16

 
79

 
72

 
34

 
31

Amortization of cumulative loss
23

 
32

 
4

 
8

 
47

 
64

 
8

 
15

Amortization of prior service benefit
—

 
—

 
(1
)
 
(1
)
 
—

 
—

 
(2
)
 
(2
)
Premiums on pension insurance
—

 
1

 
—

 
—

 
—

 
1

 
—

 
—

Expected return on assets
(48
)
 
(47
)
 
(8
)
 
(9
)
 
(96
)
 
(94
)
 
(16
)
 
(17
)
Net postretirement benefits expense
$
17

 
$
27

 
$
13

 
$
16

 
$
36

 
$
53

 
$
26

 
$
31