Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
LNG terminal costs [Member]
Property, Plant and Equipment [Line Items]
Depreciation	$ 10.6
Interest Costs Capitalized	35.3
Natural gas pipeline costs [Member]
Property, Plant and Equipment [Line Items]
Depreciation	3.7
Fixed assets [Member]
Property, Plant and Equipment [Line Items]
Depreciation	$ 0.8	$ 2.0