| Description of Equity Interests (Details) (USD $) | 0 Months Ended | 1 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 31, 2007 | Sep. 30, 2011 | Jan. 31, 2011 | Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2012
 General Partner | Jun. 30, 2012
 General Partner
 Minimum | Jun. 30, 2012
 General Partner
 Maximum | Jun. 30, 2012
 Capital Unit, Class B | May 31, 2012
 Capital Unit, Class B | Jun. 30, 2012
 Capital Unit, Class B | Dec. 31, 2011
 Capital Unit, Class B | Jun. 30, 2012
 Blackstone
 Capital Unit, Class B | May 31, 2012
 Blackstone
 Capital Unit, Class B | May 31, 2012
 Cheniere Energy, Inc.
 Capital Unit, Class B | Jul. 31, 2012
 Issuance of Equity
 Blackstone
 Capital Unit, Class B | |
| Class of Stock [Line Items] | ||||||||||||||||
| Subordinated units contributed by Cheniere LNG Holdings (shares) | 135,383,831 | |||||||||||||||
| Minimum quarterly distributions under each common unit ($ per share) | $ 0.425 | |||||||||||||||
| Percentage of distributions to which general partner interest is entitled (percent) | 2.00% | 2.00% | ||||||||||||||
| Range of higher percentage incentives (percent) | 15.00% | 50.00% | ||||||||||||||
| Common units authorized for sale under program (shares) | 1,000,000 | |||||||||||||||
| Units sold in private placement (shares) | 1,100,000 | 400,000 | 500,000 | |||||||||||||
| Price per Common Unit | 15.25 | 15.00 | ||||||||||||||
| Net proceeds from units sold under private placement | $ 8,800,000 | $ 9,000,000 | ||||||||||||||
| Commissions paid for sale of partner units | 300,000 | |||||||||||||||
| Common units sold in public offering (shares) | 3,000,000 | |||||||||||||||
| Net proceeds from sale of common units in public offereing | 60,000,000 | 12,379,000 | 3,586,000 | 0 | ||||||||||||
| Additional proceeds from general partner in connection with exercise of its right | 3,600,000 | 1,500,000 | ||||||||||||||
| Value of newly issued shares to be purchased | 1,500,000,000 | 500,000,000 | 500,000,000 | |||||||||||||
| Value of equity purchase commitment in Class B units | 1,500,000,000 | |||||||||||||||
| Periodic increase in Class B units conversion value (percent) | 3.50% | |||||||||||||||
| Class B unitholders, units issued | 11,111,111 | 11,111,111 | 0 | |||||||||||||
| Proceeds from issuance of Class B Units | $ 166,700,000 | |||||||||||||||