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Pension and Other Postemployment Benefits
 9 Months Ended
Sep. 30, 2012
Pension and Other Postemployment Benefits [Abstract]  
Pension and Other Postemployment Benefits [Text Block]
Pension and Other Postemployment Benefits
Defined Benefit Pension Plans
The components of net periodic benefit cost for the nine months ended September 30, 2012 and 2011 were (in millions):
 
2012
 
2011
 
 
 
 
 
 
 
 
Service cost
$
4.6

 
$
4.1

Interest cost
4.6

 
3.8

Expected return on plan assets
(1.9
)
 
(1.8
)
Amortization of prior service cost
2.4

 
2.4

Amortization of actuarial (gains) losses
1.1

 
0.4

 
 
 
 
 
 
 
 
 
$
10.8

 
$
8.9

 
 
 
 

During the nine months ended September 30, 2012 and 2011, we contributed approximately $5.3 million and $4.9 million, respectively, to the defined benefit pension plans.
Postemployment Arrangements
The components of net periodic benefit cost for the nine months ended September 30, 2012 and 2011 were (in millions):
 
2012
 
2011
 
 
 
 
 
 
 
 
Service cost
$
3.0

 
$
2.9

Interest cost
3.5

 
3.5

Amortization of prior service cost
1.5

 
1.6

Amortization of actuarial (gains) losses
0.6

 
0.5

 


 


 
 
 
 
 
$
8.6

 
$
8.5