| 
           Non-Controlling Interest (Details) (USD $) 
         | 
        12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 8 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Dec. 31, 2012 
         | 
        
           Dec. 31, 2011 
         | 
        
           Dec. 31, 2010 
         | 
        
           Apr. 30, 2007
 
          Chenier Partners [Member] 
         | 
        
           Dec. 31, 2012
 
          Chenier Partners [Member] 
         | 
        
           Dec. 31, 2012
 
          Cheniere LNG Holdings [Member] 
         | 
        
           Sep. 30, 2012
 
          common units [Member]
 
          Chenier Partners [Member] 
         | 
        
           Sep. 30, 2011
 
          common units [Member]
 
          Chenier Partners [Member] 
         | 
        
           Mar. 31, 2011
 
          common units [Member]
 
          Chenier Partners [Member] 
         | 
        
           Dec. 31, 2012
 
          common units [Member]
 
          Chenier Partners [Member] 
         | 
        
           Dec. 31, 2011
 
          common units [Member]
 
          Chenier Partners [Member] 
         | 
        
           Sep. 30, 2011
 
          common units [Member]
 
          Cheniere Common Units Holding, LLC [Member] 
         | 
        
           Dec. 31, 2012
 
          common units [Member]
 
          Cheniere LNG Holdings [Member] 
         | 
        
           Dec. 31, 2012
 
          common units [Member]
 
          Common Unit Purchase Option [Member]
 
          Cheniere LNG Holdings [Member] 
         | 
        
           Aug. 31, 2012
 
          Class B Unit [Member]
 
          Chenier Partners [Member] 
         | 
        
           May 31, 2012
 
          Class B Unit [Member]
 
          Chenier Partners [Member] 
         | 
        
           Dec. 31, 2012
 
          Class B Unit [Member]
 
          Chenier Partners [Member] 
         | 
      |||||||||||
| Stockholders' Equity Attributable to Noncontrolling Interest [Abstract] | |||||||||||||||||||||||||||
| Net proceeds from issuance / sale of common units | $ 1,387,339,000 | $ 52,351,000 | $ 355,671,000 | [1] | $ 203,946,000 | [2] | |||||||||||||||||||||
| Distributions to Cheniere Partners' non-controlling interest | (36,327,000) | (28,215,000) | (26,393,000) | (157,350,000) | [3] | ||||||||||||||||||||||
| Non-controlling interest | 12,861,000 | 4,582,000 | 2,191,000 | 38,002,000 | [4] | ||||||||||||||||||||||
| Non-controlling interest | 1,751,604,000 | 208,575,000 | |||||||||||||||||||||||||
| Partners' Capital Account, Units, Sold in Public Offering | 15,525,000 | 8,000,000 | 3,000,000 | 500,000 | 500,000 | 2,025,000 | |||||||||||||||||||||
| Sale of common units by Cheniere Partners | 204,878,000 | 52,351,000 | 0 | 98,400,000 | 194,000,000 | 43,300,000 | 11,100,000 | 9,000,000 | 203,900,000 | 39,400,000 | |||||||||||||||||
| Number of units authorized for sale under issuance program | 1,000,000 | 100,000,000 | |||||||||||||||||||||||||
| Common units sold in private placement | 1,100,000 | 33,300,000 | 100,000,000 | ||||||||||||||||||||||||
| Price per Common Unit | $ 25.07 | $ 15.25 | $ 15 | ||||||||||||||||||||||||
| Proceeds from Issuance in private placement | $ 16,400,000 | ||||||||||||||||||||||||||
          
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