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Retirement Plans (Tables)
 6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Components of Net Periodic Pension (Credit) Cost
Components of net periodic pension (credit) cost included the following:
 
 
United States
 
United States
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(In millions)
 
2018
 
2017
 
2018
 
2017
Interest cost
 
$
0.6

 
$
0.6

 
$
1.1

 
$
1.2

Expected return on plan assets
 
(0.8
)
 
(0.8
)
 
(1.6
)
 
(1.6
)
Amortization of net actuarial loss
 
0.1

 
0.1

 
0.2

 
0.2

Net periodic pension credit
 
(0.1
)
 
(0.1
)
 
(0.3
)
 
(0.2
)
Settlement loss
 
—

 
—

 
—

 
—

Total pension (credit) cost
 
$
(0.1
)
 
$
(0.1
)
 
$
(0.3
)
 
$
(0.2
)