Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Period	1 year
Net unrealized gain in accumulated other comprehensive income related to accounting hedges		$ 68.4
Net unrealized gain to be transferred from accumulated other comprehensive income to statement of income		76.7
HEP [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Credit agreement advance	305.0	305.0
Credit agreement advance maturing in 2016	155.0	155.0
Fixed interest rate	0.74%	0.74%
Rate added to fixed base rate	2.00%	2.00%
Effective interest rate on debt	2.74%	2.74%
Credit agreement advance maturing in 2017	$ 150.0	$ 150.0
HEP [Member] | Current Interest Rate Swap [Member]
Derivative [Line Items]
Fixed interest rate	0.99%	0.99%
Effective interest rate on debt	2.99%	2.99%