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Assets Held for Sale (Tables)
6 Months Ended
Jun. 30, 2015
Assets Held for Sale [Abstract]  
Assets Held for Sale [Table Text Block]
Carrying Values of Major Classes of Assets and Liabilities Designated as Held for Sale
The following table presents the major classes of assets and liabilities designated as held for sale on our Unaudited Condensed Consolidated Balance Sheet at June 30, 2015:

 
 
Offshore
Gulf of Mexico
Business
 
Assets held for sale:
 
 
   Current assets
 
$
26.9
 
   Property, plant and equipment, net
  
1,135.9
 
   Investments in unconsolidated affiliates
  
482.4
 
   Intangible assets, net
  
37.1
 
   Goodwill
  
82.0
 
   Other assets
  
1.2
 
Subtotal
  
1,765.5
 
Impairment charge related to goodwill
  
(54.8
)
Total presented in Current Assets
 
$
1,710.7
 
 
    
Liabilities related to assets held for sale:
    
   Current liabilities
 
$
24.1
 
   Other long-term liabilities
  
92.3
 
Total presented in Current Liabilities
 
$
116.4
 
     
Noncontrolling interests in assets held for sale
 
$
62.2
 
     
Net assets of Offshore Business before impairment charge
 
$
1,586.9
 
     
Fair value of Offshore Business based on estimated transaction price
 
$
1,532.1