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Pension and Other Postretirement Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2018
Pension  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Components of net periodic benefit (credit) cost
The components of the Company’s net periodic pension benefit (credit) cost are shown below (in millions):
 
Three Months Ended
 
March 31, 2018
 
April 1, 2017
 
U.S.
 
Foreign
 
U.S.
 
Foreign
Service cost
$
—

 
$
1.7

 
$
—

 
$
1.7

Interest cost
5.0

 
3.8

 
5.4

 
3.8

Expected return on plan assets
(6.9
)
 
(5.9
)
 
(5.9
)
 
(5.6
)
Amortization of actuarial loss
0.5

 
1.6

 
0.6

 
1.2

Settlement loss
0.2

 
—

 
0.2

 
0.8

Net periodic benefit (credit) cost
$
(1.2
)
 
$
1.2

 
$
0.3

 
$
1.9
Other postretirement  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Components of net periodic benefit (credit) cost
The components of the Company’s net periodic other postretirement benefit (credit) cost are shown below (in millions):
 
Three Months Ended
 
March 31, 2018
 
April 1, 2017
 
U.S.
 
Foreign
 
U.S.
 
Foreign
Service cost
$
—

 
$
0.1

 
$
—

 
$
0.1

Interest cost
0.5

 
0.4

 
0.6

 
0.4

Amortization of actuarial (gain) loss
(0.6
)
 
—

 
(0.6
)
 
0.1

Amortization of prior service credit
—

 
(0.1
)
 
—

 
(0.1
)
Net periodic benefit (credit) cost
$
(0.1
)
 
$
0.4

 
$
—

 
$
0.5