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Long-term Employee Benefits
 6 Months Ended
Jun. 30, 2017
Retirement Benefits [Abstract]  
Long-term Employee Benefits
LONG-TERM EMPLOYEE BENEFITS
Components of Net Periodic Benefit Cost
The following table sets forth the components of net periodic benefit cost for the three and six months ended June 30, 2017 and 2016:
 
Three Months Ended June 30,
Six Months Ended June 30,
 
2017
2016
2017
2016
Components of net periodic benefit cost:
 
 
 
 
Net periodic benefit cost:
 
 
 
 
Service cost
$
2.1

$
2.6

$
4.2

$
5.1

Interest cost
3.3

3.9

6.7

7.8

Expected return on plan assets
(3.5
)
(3.4
)
(7.0
)
(6.6
)
Amortization of actuarial loss, net
0.3

0.2

0.8

0.1

Net periodic benefit cost
$
2.2

$
3.3

$
4.7

$
6.4