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Postretirement Benefits (Tables)
 9 Months Ended
Jul. 31, 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 July 31,
 
Nine Months Ended July 31,
 
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
$
3

 
$
5

 
$
2

 
$
1

 
$
9

 
$
15

 
$
4

 
$
5

Interest on obligation
39

 
36

 
17

 
16

 
118

 
108

 
51

 
47

Amortization of cumulative loss
23

 
31

 
4

 
7

 
70

 
95

 
12

 
22

Amortization of prior service benefit
—

 
1

 
(1
)
 
(1
)
 
—

 
1

 
(3
)
 
(3
)
Contractual termination benefits
14

 
—

 
—

 
—

 
14

 
—

 
—

 
—

Premiums on pension insurance
—

 
—

 
—

 
—

 
—

 
1

 
—

 
—

Expected return on assets
(48
)
 
(48
)
 
(8
)
 
(8
)
 
(144
)
 
(142
)
 
(24
)
 
(25
)
Net postretirement benefits expense
$
31

 
$
25

 
$
14

 
$
15

 
$
67

 
$
78

 
$
40

 
$
46