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Retirement Benefit Plans
 6 Months Ended
Jun. 30, 2018
Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Pension and Other Postretirement Benefits Disclosure [Text Block] Note 13 - Retirement Benefit Plans
The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension plans. The amounts for the three and six months ended June 30, 2018 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of the respective period’s proportionate share of the amounts to be recorded for the year ending December 31, 2018.
 
U.S. Plans
International Plans
Total
 
Three Months Ended
June 30,
Three Months Ended
June 30,
Three Months Ended
June 30,
 
2018
2017
2018
2017
2018
2017
Components of net periodic benefit cost:
 
 
 
 
 
 
Service cost
$
3.2

$
3.0

$
0.4

$
0.4

$
3.6

$
3.4

Interest cost
5.8

6.1

1.8

1.9

7.6

8.0

Expected return on plan assets
(7.3
)
(7.0
)
(2.9
)
(2.7
)
(10.2
)
(9.7
)
Amortization of prior service cost
0.4

0.4

—

—

0.4

0.4

Recognition of actuarial gains
(2.4
)
—

—

—

(2.4
)
—

   Net periodic benefit cost
$
(0.3
)
$
2.5

$
(0.7
)
$
(0.4
)
$
(1.0
)
$
2.1


 
U.S. Plans
International Plans
Total
 
Six Months Ended
June 30,
Six Months Ended
June 30,
Six Months Ended
June 30,
 
2018
2017
2018
2017
2018
2017
Components of net periodic benefit cost:
 
 
 
 
 
 
Service cost
$
6.4

$
6.1

$
0.8

$
0.8

$
7.2

$
6.9

Interest cost
11.7

12.3

3.7

3.7

15.4

16.0

Expected return on plan assets
(14.6
)
(14.0
)
(5.9
)
(5.4
)
(20.5
)
(19.4
)
Amortization of prior service cost
0.8

0.7

—

—

0.8

0.7

Recognition of actuarial (gains) losses
(2.4
)
4.4

—

—

(2.4
)
4.4

Net periodic benefit cost
$
1.9

$
9.5

$
(1.4
)
$
(0.9
)
$
0.5

$
8.6


During the three months ended June 30, 2018, the Company recognized actuarial gains of $2.4 million. During the six months ended June 30, 2017, the Company recognized actuarial losses of $4.4 million. The remeasurements were required in each period as a result of lump sum payments to new retirees exceeding service and interest costs for one of the Company's U.S. defined benefit pension plans.