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Retirement Plans (Tables)
 6 Months Ended
Jun. 30, 2017
Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Net Periodic Benefit Cost
The net periodic benefit cost for the Company's defined benefit pension plans was as follows:
 
Three Months Ended
 
Six Months Ended
 
June 30,
2017
 
June 24,
2016
 
June 30,
2017
 
June 24,
2016
Service cost
$
0.2


$
0.4

 
$
1.5

 
$
0.8

Interest cost
0.4


3.5

 
2.1

 
7.0

Expected return on plan assets
—


(4.2
)
 
(1.3
)
 
(8.4
)
Amortization of net actuarial loss
0.4


2.6

 
2.6

 
5.2

Amortization of prior service cost
0.1

 
—

 
0.2

 
—

Plan settlements
0.5

 
3.3

 
69.7

 
7.0

Net periodic benefit cost
$
1.6


$
5.6

 
$
74.8

 
$
11.6