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Reconciliation of Significant Asset Balances
12 Months Ended
Dec. 31, 2011
Reconciliation of Significant Asset Balances [Abstract]  
Reconciliation of Significant Asset Balances
19.  Reconciliation of Significant Asset Balances
 
The following is a reconciliation between KMP’s significant asset balances as reported in KMP’s Annual Report on Form 10-K as of December 31, 2011 and 2010 and our consolidated asset balances as shown on our accompanying consolidated balance sheets (in millions):
 
   
December 31,
 
   
2011
  
2010
 
Property, plant and equipment, net–KMP
 $15,595.8  $14,603.9 
Purchase accounting adjustments associated with our investment in KMP
  2,310.6   2,445.2 
Property, plant and equipment, net–KMI
  19.6   21.6 
Property, plant and equipment, net
 $17,926.0  $17,070.7 
          
Investments–KMP
 $3,346.2  $3,886.0 
Purchase accounting adjustments associated with our investment in KMP
  135.5   139.3 
Investments–KMI
  262.7   265.8 
Investments
 $3,744.4  $4,291.1 
          
Goodwill–KMP
 $1,436.2  $1,233.6 
Purchase accounting adjustments associated with our investment in KMP
  3,637.3   3,597.3 
Goodwill
 $5,073.5  $4,830.9