| 
           Subsequent Events (Details) (USD $) 
        In Millions, except Share data, unless otherwise specified  | 
        5 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended | ||
|---|---|---|---|---|---|---|
| 
           Sep. 30, 2012
 
          Blackstone CQP Holdco LP [Member]
 
          Capital Unit, Class B 
         | 
        
           May 31, 2012
 
          Cheniere Partners
 
          Capital Unit, Class B 
         | 
        
           Sep. 30, 2012
 
          Cheniere Partners
 
          Capital Unit, Class B 
         | 
        
           Oct. 31, 2012
 
          Issuance of Equity
 
          Blackstone CQP Holdco LP [Member]
 
          Capital Unit, Class B 
         | 
        
           Oct. 31, 2012
 
          Repayment of Debt [Member]
 
          Sabine Pass LNG, LP
 
          2013 Senior Notes 
         | 
        
           Oct. 31, 2012
 
          Issuance of Debt [Member]
 
          2020 Senior Secured Notes [Member] 
         | 
      |
| Subsequent Event [Line Items] | ||||||
| Number of common units sold in private placement | 66,700,000 | 100,000,000 | 66,700,000 | 300,000,000 | ||
| Proceeds from Issuance of common units | $ 1,300.0 | |||||
| Percentage of debt principal redeemed (percent) | 97.00% | |||||
| Principal amount of debt | 420.0 | |||||
| Debt instrument interest rate, stated percentage | 6.50% | |||||
| Long-term debt outstanding | $ 16.5 | |||||
| X | ||||||||||
| 
             
- Definition 
          Redemption of Debt Instrument, Percentage No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The number of units sold in a private placement of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
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