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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Tables)
 9 Months Ended
Jul. 31, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of net pension and post-retirement benefit costs
For the three and nine months ended July 31, 2016 and 2015, our net pension and post-retirement benefit costs were comprised of the following:
 
Pensions
 
 
 
U.S. Defined Benefit Plans
 
Non-U.S. Defined Benefit
Plans
 
U.S. Post-Retirement
Benefit Plan
 
Three Months Ended July 31,
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
(in millions)
Service cost—benefits earned during the period
$
5

 
$
5

 
$
5

 
$
4

 
$
—

 
$
—

Interest cost on benefit obligation
6

 
5

 
8

 
10

 
2

 
2

Expected return on plan assets
(9
)
 
(9
)
 
(19
)
 
(18
)
 
(3
)
 
(4
)
Amortization:
 
 
 
 
 
 
 
 
 
 
 
Net actuarial losses
2

 
1

 
7

 
8

 
5

 
3

Prior service credit
(2
)
 
(2
)
 
—

 
(1
)
 
(4
)
 
(5
)
Total periodic benefit cost (benefit)
$
2

 
$
—

 
$
1

 
$
3

 
$
—

 
$
(4
)


 
Pensions
 
 
 
U.S. Defined Benefit Plans
 
Non-U.S. Defined Benefit
Plans
 
U.S. Post-Retirement
Benefit Plan
 
Nine Months Ended July 31,
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
(in millions)
Service cost—benefits earned during the period
$
15

 
$
16

 
$
13

 
$
13

 
$
—

 
$
1

Interest cost on benefit obligation
18

 
15

 
24

 
31

 
6

 
6

Expected return on plan assets
(27
)
 
(28
)
 
(56
)
 
(55
)
 
(10
)
 
(11
)
Amortization:
 
 
 
 
 
 
 
 
 
 
 
Net actuarial losses
6

 
3

 
21

 
22

 
15

 
9

Prior service credit
(6
)
 
(5
)
 
—

 
(1
)
 
(12
)
 
(16
)
Total periodic benefit cost (benefit)
$
6

 
$
1

 
$
2

 
$
10

 
$
(1
)
 
$
(11
)