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Pensions and Other Benefit Programs (Tables)
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The components of net periodic benefit cost (income) were as follows:
 
Defined Benefit Pension Plans
 
Nonpension Postretirement Benefit Plans
 
United States
 
Foreign
 
 
 
Three Months Ended
 
Three Months Ended
 
Three Months Ended
 
March 31,
 
March 31,
 
March 31,
 
2018
 
2017
 
2018
 
2017
 
2018
 
2017
Service cost
$
37

 
$
30

 
$
589

 
$
542

 
$
407

 
$
419

Interest cost
15,616

 
17,244

 
4,696

 
4,544

 
1,603

 
1,771

Expected return on plan assets
(25,424
)
 
(24,548
)
 
(9,185
)
 
(7,780
)
 
—

 
—

Amortization of transition credit
—

 
—

 
(2
)
 
(2
)
 
—

 
—

Amortization of prior service (credit) cost
(15
)
 
(15
)
 
(18
)
 
(18
)
 
88

 
74

Amortization of net actuarial loss
8,076

 
7,268

 
1,912

 
2,034

 
934

 
884

Net periodic benefit cost (income)
$
(1,710
)
 
$
(21
)
 
$
(2,008
)
 
$
(680
)
 
$
3,032

 
$
3,148