| 
           Variable Interest Entity (Details) (USD $) 
        In Millions, except Share data, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended | 5 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Sep. 30, 2012
 
          JPMorgan LNG Co (LNGCo) [Member] 
         | 
        
           Sep. 30, 2011
 
          JPMorgan LNG Co (LNGCo) [Member] 
         | 
        
           Sep. 30, 2012
 
          JPMorgan LNG Co (LNGCo) [Member] 
         | 
        
           Sep. 30, 2011
 
          JPMorgan LNG Co (LNGCo) [Member] 
         | 
        
           Sep. 30, 2012
 
          Cheniere Partners 
         | 
        
           Sep. 30, 2012
 
          common units
 
          Cheniere Partners 
         | 
        
           May 31, 2012
 
          Capital Unit, Class B
 
          Cheniere Partners 
         | 
        
           Sep. 30, 2012
 
          Capital Unit, Class B
 
          Cheniere Partners 
         | 
        
           Aug. 31, 2012
 
          Capital Unit, Class B
 
          Blackstone CQP Holdco LP [Member] 
         | 
        
           Sep. 30, 2012
 
          Capital Unit, Class B
 
          Blackstone CQP Holdco LP [Member] 
         | 
        
           Sep. 30, 2012
 
          Subordinated Units [Member]
 
          Cheniere Partners 
         | 
        
           Sep. 30, 2012
 
          Minimum [Member]
 
          Blackstone CQP Holdco LP [Member] 
         | 
        
           Sep. 30, 2012
 
          Minimum [Member]
 
          Capital Unit, Class B
 
          Blackstone CQP Holdco LP [Member] 
         | 
      |
| Variable Interest Entity [Line Items] | |||||||||||||
| Marketing and trading revenues | $ 0 | $ 1.7 | $ 4.0 | $ 9.0 | |||||||||
| Ownership interest (percent) | 66.40% | 20.00% | |||||||||||
| Number of Cheniere Energy Partners units owned | 12,000,000 | 33,300,000 | 135,400,000 | ||||||||||
| Common units held | 50,000,000 | ||||||||||||
| General Partner Ownership Interest Percentage | 2.00% | ||||||||||||
| Number of common units sold in private placement | 100,000,000 | 66,700,000 | 66,700,000 | ||||||||||
| Price per common unit (US$ per unit) | 15 | 15.00 | |||||||||||
| Partners' Capital Account, Units, Redeemed | 33,300,000 | ||||||||||||