Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Unrealized Gain (Loss) From Hedging Activites	$ 1.9
Net unrealized gain in accumulated other comprehensive income related to accounting hedges	41.7
Net unrealized gain to be transferred from accumulated other comprehensive income to statement of income	$ (26.4)
HEP [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Fixed interest rate	0.74%
Rate added to fixed base rate	2.25%
Effective interest rate on debt	2.99%
Credit agreement advance maturing in 2017	$ 150.0