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EMPLOYEE BENEFIT PLANS
 9 Months Ended
Sep. 30, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
EMPLOYEE BENEFIT PLANS
EMPLOYEE BENEFIT PLANS
Net periodic (benefit) cost for our pension and postretirement benefit plans was as follows:
 
Pension Plans
 
Postretirement Plans
Three Months Ended September 30,
2015
 
2014
 
2015
 
2014
Service cost
$
0.5

 
$
0.9

 
$
0.2

 
$
0.3

Interest cost
8.2

 
10.9

 
2.0

 
2.0

Expected return on plan assets
(10.7
)
 
(12.7
)
 
(0.3
)
 
(0.3
)
Net amortization
—

 
—

 
(0.7
)
 
(0.8
)
Net periodic (benefit) cost
$
(2.0
)
 
$
(0.9
)
 
$
1.2

 
$
1.2

 
Pension Plans
 
Postretirement Plans
Nine Months Ended September 30,
2015
 
2014
 
2015
 
2014
Service cost
$
1.5

 
$
2.7

 
$
0.8

 
$
0.7

Interest cost
24.9

 
32.8

 
5.9

 
6.0

Expected return on plan assets
(32.5
)
 
(38.3
)
 
(0.9
)
 
(1.0
)
Net amortization
0.1

 
0.1

 
(2.1
)
 
(2.3
)
Net periodic (benefit) cost
$
(6.0
)
 
$
(2.7
)
 
$
3.7

 
$
3.4

We disclosed in our 2014 Annual Report on Form 10-K that we expected to contribute $4.9 and $10.2 in 2015 to our pension and postretirement plans, respectively. Through September 30, 2015, actual contributions to our continuing pension and postretirement plans were $4.2 and $7.4, respectively.
We also sponsor various defined contribution retirement plans in the United States and a number of other countries, consisting primarily of savings and profit growth sharing plans. Contributions to the savings plans are based in part on matching a percentage of employees’ contributions. Contributions to the profit growth sharing plans are generally based on our financial performance. Amounts expensed related to these plans for the three months ended September 30, 2015 and 2014 were $6.1 and $5.7, respectively, and for the nine months ended September 30, 2015 and 2014 were $19.9 and $18.2, respectively.