Properties, Plants and Equipment (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Capitalized interest	$ 5.5	$ 11.8	$ 12.1
Depreciation expense	233.3	261.8	213.6
HEP
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 58.7	$ 58.1	$ 62.3