| 
           Variable Interest Entity (Details) (USD $) 
        In Millions, except Per Share data, unless otherwise specified  | 
        1 Months Ended | 1 Months Ended | 8 Months Ended | 1 Months Ended | 8 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Sep. 30, 2011
 
          common units [Member] 
         | 
        
           Sep. 30, 2012
 
          common units [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Mar. 31, 2013
 
          common units [Member]
 
          Sabine Pass LNG terminal [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           May 31, 2012
 
          Class B Unit [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Dec. 31, 2012
 
          Class B Unit [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Mar. 31, 2013
 
          Class B Unit [Member]
 
          Sabine Pass LNG terminal [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Mar. 31, 2013
 
          Subordinated Units [Member]
 
          Sabine Pass LNG terminal [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Mar. 31, 2013
 
          General Partner [Member]
 
          Sabine Pass LNG terminal [Member] 
         | 
        
           Mar. 31, 2013
 
          Minimum [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Aug. 31, 2012
 
          Blackstone CQP Holdco LP [Member]
 
          Class B Unit [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
        
           Dec. 31, 2012
 
          Blackstone CQP Holdco LP [Member]
 
          Class B Unit [Member]
 
          Chenier Energy Partners, LP [Member] 
         | 
      |
| Variable Interest Entity [Line Items] | |||||||||||
| Ownership Interest | 0.00% | 0.00% | |||||||||
| Common units held | 12.0 | 33.3 | 135.4 | 50.0 | |||||||
| Price per Common Unit | $ 15.25 | $ 25.07 | $ 15.00 | ||||||||
| Common units sold in private placement | 100.0 | 33.3 | 100.0 | ||||||||