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Postretirement Benefits (Tables)
 9 Months Ended
Jul. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Net Benefit Costs [Table Text Block]
et postretirement benefits expense included in our Consolidated Statements of Operations:
 
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)
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
Service cost for benefits earned during the period
$
5

 
$
5

 
$
1

 
$
1

 
$
15

 
$
13

 
$
5

 
$
5

Interest on obligation
36

 
43

 
16

 
20

 
108

 
129

 
47

 
62

Amortization of cumulative loss
31

 
27

 
7

 
10

 
95

 
82

 
22

 
30

Amortization of prior service benefit
1

 
1

 
(1
)
 
(2
)
 
1

 
1

 
(3
)
 
(4
)
Contractual termination benefits
—

 
—

 
—

 
—

 
—

 
—

 
—

 
(3
)
Premiums on pension insurance
—

 
—

 
—

 
—

 
1

 
1

 
—

 
—

Expected return on assets
(48
)
 
(49
)
 
(8
)
 
(8
)
 
(142
)
 
(145
)
 
(25
)
 
(26
)
Net postretirement benefits expense
$
25

 
$
27

 
$
15

 
$
21

 
$
78

 
$
81

 
$
46

 
$
64