Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Unrealized Gain (Loss) From Hedging Activites	$ 1.6
Net unrealized gain in accumulated other comprehensive income related to accounting hedges	24.7
Net unrealized gain to be transferred from accumulated other comprehensive income to statement of income	$ (16.2)
HEP [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Rate added to fixed base rate	2.25%
Credit agreement advance maturing in 2017	$ 150.0
London Interbank Offered Rate (LIBOR) [Member] | HEP [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Fixed interest rate	0.74%
Effective interest rate on debt	2.99%