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Postretirement Benefits
 6 Months Ended
Jun. 30, 2011
Postretirement Benefits [Abstract]  
POSTRETIREMENT BENEFITS
9. POSTRETIREMENT BENEFITS
The components of the Company’s net periodic pension expense for its defined benefit pension plans are summarized as follows:
                                                                 
    U.S. Benefit Plan     Non-U.S. Benefit Plan  
    Three months ended     Six months ended     Three months ended     Six months ended  
    June 30,     June 30,     June 30,     June 30,  
($ in millions)   2011     2010     2011     2010     2011     2010     2011     2010  
Service Cost
  $ —     $ —     $ —     $ —     $ —     $ —     $ 0.1     $ —  
Interest cost
    2.0       2.0       3.9       3.9       0.7       0.8       1.4     $ 1.5  
Expected return on plan assets
    (1.9 )     (2.2 )     (3.8 )     (4.4 )     (0.8 )     (0.8 )     (1.6 )     (1.5 )
Amortization of actuarial loss
    1.2       0.9       2.4       1.9       0.2       0.2       0.4       0.3  
 
                                               
Net periodic pension expense
  $ 1.3     $ 0.7     $ 2.5     $ 1.4     $ 0.1     $ 0.2     $ 0.3     $ 0.3  
 
                                               
During the six month period ended June 30, 2011, no contribution was made to the U.S. defined benefit plan and a $0.6 million contribution was made to the non-U.S. defined benefit plan. During the comparable prior year period, no contribution to the U.S. defined benefit plan was made and the Company contributed $0.5 million to the non-U.S. defined benefit plan.