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Network
2437407 - Disclosure - Postretirement Benefits, Schedule of Assumptions Used (Details)
(http://www.alonusa.com/role/PostretirementBenefitsScheduleOfAssumptionsUsedDetails)
TableDefined Benefit Plans and Other Postretirement Benefit Plans Disclosures
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001325955 (http://www.sec.gov/CIK)
Defined Benefit Plans and Other Postretirement Benefit PlansDefined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text BlockPeriod [Axis]
2017-01-01 - 2017-03-31
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
ScenarioScenarioScenarioScenario
Scenario, ForecastScenario, UnspecifiedScenario, UnspecifiedScenario, Unspecified
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation
 
 
 
 
Discount rate
 
4.15%  
4.45%  
3.95%  
Rate of compensation increase
 
2.20%  
3.00%  
2.50%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost
 
 
 
 
Discount rate
 
4.45%  
3.95%  
4.75%  
Expected return on plan assets
7.60%  
8.50%  
8.50%  
8.60%  
Rate of compensation increase
 
3.00%  
2.50%  
3.00%