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(Tables)
 3 Months Ended
Jan. 31, 2018
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
Net periodic benefit expense included in our Consolidated Statements of Operations, and other amounts recognized in our Consolidated Statements of Stockholders' Deficit, for the quarters ended January 31 is comprised of the following:
 
Three Months Ended January 31,
 
Pension Benefits
 
Health and Life
Insurance Benefits
(in millions)
2018
 
2017
 
2018
 
2017
Service cost for benefits earned during the period
$
2

 
$
2

 
$
1

 
$
1

Interest on obligation
27

 
27

 
11

 
12

Amortization of cumulative loss
26

 
29

 
2

 
6

Settlements
9

 
—

 
—

 
—

Contractual termination benefits
—

 
1

 
—

 
—

Premiums on pension insurance
2

 
4

 
—

 
—

Expected return on assets
(40
)
 
(40
)
 
(6
)
 
(6
)
Net periodic benefit expense
$
26

 
$
23

 
$
8

 
$
13