Cheniere Energy Partners, L.P. Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - LNG Terminal Capacity Agreements (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) bcf / d $ / MMBTU	Sep. 30, 2017 USD ($)
Related Party Transaction [Line Items]
Regasification Capacity \| bcf / d			4.0
LNG Volume, Purchase Price Percentage of Henry Hub			115.00%
Terminal Use Agreement [Member] \| SPLNG [Member] \| SPL [Member]
Related Party Transaction [Line Items]
Regasification Capacity \| bcf / d			2.0
Related Party Transaction, Committed Annual Fee \| $			$ 250,000,000
Amended and Restated Variable Capacity Rights Agreement [Member] \| Cheniere Marketing [Member] \| Cheniere Investments [Member]
Related Party Transaction [Line Items]
Proceeds (Payments) of Gross Margin Earned, Percentage			80.00%
LNG revenues—affiliate \| $	$ 0	$ 0	$ 0	$ 0
LNG Sale and Purchase Agreement [Member] \| Cheniere Marketing [Member] \| SPL [Member]
Related Party Transaction [Line Items]
LNG Volume, Purchase Price Percentage of Henry Hub			115.00%
LNG Volume, Purchase Price Per MMBtu \| $ / MMBTU			3.00