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Employee Benefit and Retirement Plans (Tables)
 9 Months Ended
Aug. 31, 2019
Retirement Benefits [Abstract]  
Schedule of defined benefit plans disclosures
The following table presents the components of our pension (income) expense of the defined benefit plans for the three months ended August 31, 2019 and 2018 (in millions):
 
United States
 
International
 
2019
 
2018
 
2019
 
2018
Defined benefit plans
 
 
 
 
 
 
 
Service cost
$
0.5

 
$
4.4

 
$
0.9

 
$
1.0

Interest costs
8.6

 
8.0

 
2.3

 
2.2

Expected return on plan assets
(10.6
)
 
(10.8
)
 
(4.0
)
 
(4.0
)
Amortization of prior service costs
0.1

 
—

 
—

 
—

Amortization of net actuarial losses
0.6

 
2.4

 
0.3

 
0.7

Total pension (income) expense
$
(0.8
)
 
$
4.0

 
$
(0.5
)
 
$
(0.1
)

The following table presents the components of our pension (income) expense of the defined benefit plans for the nine months ended August 31, 2019 and 2018 (in millions):
 
United States
 
International
 
2019
 
2018
 
2019
 
2018
Defined benefit plans
 
 
 
 
 
 
 
Service cost
$
1.5

 
$
13.1

 
$
2.7

 
$
3.2

Interest costs
25.8

 
23.8

 
7.1

 
6.9

Expected return on plan assets
(31.8
)
 
(32.4
)
 
(12.3
)
 
(12.4
)
Amortization of prior service costs
0.3

 
—

 
0.1

 
0.5

Amortization of net actuarial losses
1.8

 
7.4

 
0.9

 
2.1

Total pension (income) expense
$
(2.4
)
 
$
11.9

 
$
(1.5
)
 
$
0.3
Schedule of costs of retirement plans
The following table presents the components of our other postretirement benefits (income) expense (in millions):


Three months ended August 31,

Nine months ended August 31,
 

2019
 
2018

2019

2018
Other postretirement benefits








Service cost

$
0.5


$
0.6


$
1.5


$
1.8

Interest costs

0.7


0.6


2.0


1.8

Amortization of prior service credits

(2.2
)

(2.2
)

(6.5
)

(6.5
)
Amortization of net actuarial gains

(0.1
)

—


(0.5
)

—

Total other postretirement benefits (income) expense

$
(1.1
)

$
(1.0
)

$
(3.5
)

$
(2.9
)