| 
           Property, Plant and Equipment (Details) (USD $) 
        In Millions, unless otherwise specified  | 
        3 Months Ended | |
|---|---|---|
| 
           Mar. 31, 2013 
         | 
        
           Mar. 31, 2012 
         | 
      |
| 
           LNG terminal costs [Member] 
         | 
        ||
| Property, Plant and Equipment [Line Items] | ||
| Depreciation | $ 10.6 | |
| Interest Costs Capitalized | 35.3 | |
| 
           Natural gas pipeline costs [Member] 
         | 
        ||
| Property, Plant and Equipment [Line Items] | ||
| Depreciation | 3.7 | |
| 
           Fixed assets [Member] 
         | 
        ||
| Property, Plant and Equipment [Line Items] | ||
| Depreciation | $ 0.8 | $ 2.0 | 
| X | ||||||||||
| 
             
- Definition 
          The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of interest capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
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- Details 
          
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