| Non-Controlling Interest (Details) (USD $) | 3 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar. 31, 2012 | Mar. 31, 2011 | Dec. 31, 2011 | Sep. 30, 2011
 Chenier Partners [Member] | Apr. 30, 2007
 Chenier Partners [Member] | Mar. 31, 2012
 Chenier Partners [Member] | Dec. 31, 2011
 Chenier Partners [Member] | Jan. 31, 2011
 Chenier Partners [Member]
 Maximum [Member] | Mar. 31, 2012
 Cheniere LNG Holdings [Member] | Dec. 31, 2011
 Cheniere LNG Holdings [Member] | Sep. 30, 2011
 Cheniere Common Units Holding, LLC [Member] | Dec. 31, 2011
 Common Unit Option [Member]
 Cheniere LNG Holdings [Member] | |||||||||
| Stockholders' Equity Attributable to Noncontrolling Interest [Abstract] | ||||||||||||||||||||
| Net proceeds from issuance / sale of common units | $ 2,843,000 | $ 153,636,000 | [1] | $ 203,946,000 | [2] | |||||||||||||||
| Distributions to Cheniere Partners' non-controlling interest | (8,092,000) | (129,115,000) | [3] | |||||||||||||||||
| Non-controlling interest share of loss of Cheniere Partners | 2,438,000 | 641,000 | 27,579,000 | |||||||||||||||||
| Non-controlling interest | 200,888,000 | 208,575,000 | ||||||||||||||||||
| Partners' Capital Account, Units, Sold in Public Offering | 3,000,000 | 15,525,000 | 100,000 | 500,000 | ||||||||||||||||
| Net proceeds from issuance of common units | 2,843,000 | 1,515,000 | 43,300,000 | 98,400,000 | 9,000,000 | 203,900,000 | 39,400,000 | |||||||||||||
| At-the-Market Sale Program, Authorized Number of Units | 1,000,000 | |||||||||||||||||||
| Partners' Capital Account, Units, Sold in Private Placement | 1,100,000 | 2,025,000 | ||||||||||||||||||
| Price per Common Unit | $ 15.25 | |||||||||||||||||||
| Proceeds from Issuance of common units to Cheniere Common UNits Holdings, LLC | $ 16,400,000 | |||||||||||||||||||
| 
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