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Summary of Non-cash Operating, Investing and Financing Activities
12 Months Ended
Dec. 31, 2012
Summary of Non-cash Operating, Investing and Financing Activities [Abstract]  
Summary of Non-cash Operating, Investing and Financing Activities
Note 17: Summary of Non-cash Operating, Investing and Financing Activities

 The effect on net assets of non-cash operating, investing and financing activities was as follows:
 
(dollars in millions)
 
2012
  
2011
  
2010
 
           
Impact on net assets of indemnity settlement with BP Exploration and Production, Inc.
 $  $(82.5) $ 
NATCO purchase price allocation adjustment
 $  $  $(16.9)
Tax benefit of stock compensation plan transactions
 $11.5  $4.9  $17.4 
Change in fair value of derivatives accounted for as cash flow hedges, net of tax
 $10.1  $(5.2) $(6.1)
Actuarial gain (loss) and impact of plan amendments, net, related to defined benefit pension and postretirement benefit plans
 $(33.3) $(7.7) $4.5