Goodwill	12 Months Ended
Dec. 31, 2016
Goodwill [Abstract]
Goodwill	Goodwill and Long-lived Asset Impairment As of December 31, 2016, our goodwill balance was $2.0 billion, with goodwill assigned to our refining and HEP segments of $1.7 billion and $0.3 billion, respectively. During the second quarter of 2016, we performed interim goodwill impairment and related long-lived asset impairment testing of our El Dorado and Cheyenne Refinery reporting units after identifying a combination of events and circumstances that are indicators of potential goodwill and long-lived asset impairment. The indicators included lower than typical gross margins during the summer driving season, a decrease in the gross margin outlook and decrease in our market capitalization due to a decline in our common share price. Our testing first assessed the carrying values of our refining long-lived asset groups for recoverability. This entailed a comparison of our reporting unit fair values relative to their respective carrying values. If carrying value exceeds fair value for a reporting unit, we measure goodwill impairment as the excess of the carrying amount of reporting unit goodwill over the implied fair value of that goodwill based on estimates of the fair value of all assets and liabilities in the reporting unit. The estimated fair values of our goodwill reporting units and long-lived asset groups were derived using a combination of both income and market approaches. The income approach reflects expected future cash flows based on estimates of future crack spreads, forecasted production levels, operating costs and capital expenditures. Our market approaches include both the guideline public company and guideline transaction methods. Both methods utilize pricing multiples derived from historical market transactions of other like-kind assets. These fair value measurements involve significant unobservable inputs (Level 3 inputs). As a result of our impairment testing during the second quarter of 2016, we determined that the carrying value of the long-lived assets of the Cheyenne Refinery had been impaired and recorded long-lived asset impairment charges of $344.8 million that principally related to properties, plant and equipment. Additionally, the carrying value of the Cheyenne Refinery’s goodwill was fully impaired and a goodwill impairment charge of $309.3 million was also recorded, representing all of the goodwill allocated to our Cheyenne Refinery. Our interim testing did not identify any impairment related to our El Dorado reporting unit. We performed our annual goodwill impairment testing at July 1, 2016 and determined that the fair value of our El Dorado reporting unit exceeded its carrying value by approximately 4%. Additionally, testing indicated no impairment of goodwill attributable to our HEP reporting unit. The market outlook for future crack spreads has since improved and based on subsequent testing, the fair value of the El Dorado reporting unit exceeded its carrying value by approximately 20% at December 31, 2016. A reasonable expectation exists that future deterioration in gross margins could result in an impairment of goodwill and the long-lived assets of the El Dorado reporting unit at some point in the future and such impairment charges could be material. As of December 31, 2016, accumulated goodwill losses recognized totaled $309.3 million, all of which relates to our Refining segment. There were no impairments of goodwill or long-lived assets during the years ended December 31, 2015 and 2014.

Goodwill

12 Months Ended

Dec. 31, 2016

Goodwill and Long-lived Asset Impairment

As of December 31, 2016, our goodwill balance was $2.0 billion, with goodwill assigned to our refining and HEP segments of $1.7 billion and $0.3 billion, respectively.

During the second quarter of 2016, we performed interim goodwill impairment and related long-lived asset impairment testing of our El Dorado and Cheyenne Refinery reporting units after identifying a combination of events and circumstances that are indicators of potential goodwill and long-lived asset impairment. The indicators included lower than typical gross margins during the summer driving season, a decrease in the gross margin outlook and decrease in our market capitalization due to a decline in our common share price.

Our testing first assessed the carrying values of our refining long-lived asset groups for recoverability. This entailed a comparison of our reporting unit fair values relative to their respective carrying values. If carrying value exceeds fair value for a reporting unit, we measure goodwill impairment as the excess of the carrying amount of reporting unit goodwill over the implied fair value of that goodwill based on estimates of the fair value of all assets and liabilities in the reporting unit.

The estimated fair values of our goodwill reporting units and long-lived asset groups were derived using a combination of both income and market approaches. The income approach reflects expected future cash flows based on estimates of future crack spreads, forecasted production levels, operating costs and capital expenditures. Our market approaches include both the guideline public company and guideline transaction methods. Both methods utilize pricing multiples derived from historical market transactions of other like-kind assets. These fair value measurements involve significant unobservable inputs (Level 3 inputs).

As a result of our impairment testing during the second quarter of 2016, we determined that the carrying value of the long-lived assets of the Cheyenne Refinery had been impaired and recorded long-lived asset impairment charges of $344.8 million that principally related to properties, plant and equipment. Additionally, the carrying value of the Cheyenne Refinery’s goodwill was fully impaired and a goodwill impairment charge of $309.3 million was also recorded, representing all of the goodwill allocated to our Cheyenne Refinery. Our interim testing did not identify any impairment related to our El Dorado reporting unit.

We performed our annual goodwill impairment testing at July 1, 2016 and determined that the fair value of our El Dorado reporting unit exceeded its carrying value by approximately 4%. Additionally, testing indicated no impairment of goodwill attributable to our HEP reporting unit. The market outlook for future crack spreads has since improved and based on subsequent testing, the fair value of the El Dorado reporting unit exceeded its carrying value by approximately 20% at December 31, 2016. A reasonable expectation exists that future deterioration in gross margins could result in an impairment of goodwill and the long-lived assets of the El Dorado reporting unit at some point in the future and such impairment charges could be material.

As of December 31, 2016, accumulated goodwill losses recognized totaled $309.3 million, all of which relates to our Refining segment. There were no impairments of goodwill or long-lived assets during the years ended December 31, 2015 and 2014.