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Retirement Plans and Other Retiree Benefits (Tables)
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Components Of Net Periodic Benefit Cost
Components of Net periodic benefit cost for the three months ended March 31, 2018 and 2017 were as follows:
 
Pension Benefits
 
Other Retiree Benefits
 
United States
 
International
 
 
 
 
 
Three Months Ended March 31,
 
2018
 
2017
 
2018
 
2017
 
2018
 
2017
Service cost
$
—

 
$
—

 
$
4

 
$
4

 
$
4

 
$
4

Interest cost
21

 
24

 
6

 
5

 
10

 
11

Expected return on plan assets
(29
)
 
(27
)
 
(6
)
 
(5
)
 
—

 
—

Amortization of transition and prior service costs (credits)
—

 
—

 
—

 
—

 
—

 
—

Amortization of actuarial loss (gain)
12

 
12

 
2

 
2

 
4

 
4

Net periodic benefit cost
$
4

 
$
9

 
$
6

 
$
6

 
$
18

 
$
19