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Retirement and Post-Retirement Benefit Plans (Tables)
 3 Months Ended
Jan. 31, 2018
Retirement Benefits [Abstract]  
Summary of Net Benefit Cost
The Company's net pension benefit cost for defined benefit plans recognized in the Condensed Consolidated Statements of Earnings for the three months ended January 31, 2018 and 2017, was as follows:
 
Three months ended January 31,
 
2018
 
2017
 
In millions
Service cost
$
26

 
$
40

Interest cost
55

 
50

Expected return on plan assets
(139
)
 
(133
)
Amortization and deferrals:
 

 
 

Actuarial loss
52

 
76

Prior service benefit
(4
)
 
(4
)
Net periodic benefit (credit) cost
(10
)
 
29

Special termination benefits
2

 
1

Plan expense allocation(1)
—

 
(12
)
Net benefit (credit) cost from continuing operations
(8
)
 
18

Summary of net benefit (credit) cost:
 
 
 
Continuing operations
(8
)
 
18

Discontinued operations
—

 
46

Net benefit (credit) cost
$
(8
)
 
$
64


 
(1)
Plan expense allocation represents the net cost impact of employees of HPE covered under Everett or Seattle plans and employees of Everett or Seattle covered under HPE plans.