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Benefit Plans (Details) (Defined-contribution 401(k) plans, USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended | 0 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2012 Y plan | Dec. 31, 2011 | Dec. 31, 2010 | Apr. 01, 2013 plan | Dec. 31, 2012 CVR | Dec. 31, 2012 Nonunion plan CVR | Dec. 31, 2012 Union plan Wynnewood Acquisition | Dec. 31, 2012 Union plan CVR | Apr. 03, 2013 Union plan CVR Wynnewood Acquisition
Benefit Plans |  |  |  |  |  |  |  |  |
Number of defined-contribution 401(k) plans | 3 |  |  | 2 |  |  |  |  |
Employee contribution limit per calendar year as a percentage of annual salaries |  |  |  |  | 50.00% |  |  |  |
Employee contribution limit per calendar year as a percentage of annual income sharing |  |  |  |  | 100.00% |  |  |  |
Employer match of employee contributions of first 6% of eligible compensation (as a percent) |  |  |  |  |  | 100.00% | 80.00% | 100.00% | 100.00%
Percentage of eligible compensation, matched by employer |  |  |  |  |  | 6.00% | 5.00% | 6.00% | 6.00%
Employer contribution each pay period (as a percent) |  |  |  |  |  |  | 3.00% |  |
Vesting schedule for employer's matching funds | 3 |  |  |  |  |  |  |  |
Matching contributions made by the company during the year | $ 4.5 | $ 2.3 | $ 2.2 |  |  |  |  |  |

X
- Definition The limit of annual employee contributions to the plan per calendar year as a percentage of annual income sharing. + References No definition available. + Details
Name: | cvi_DefinedContributionPlanEmployeeContributionLimitPercentageOfAnnualIncomeSharing
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The limit of annual employee contributions to the plan per calendar year as a percentage of compensation. + References No definition available. + Details
Name: | cvi_DefinedContributionPlanEmployeeContributionLimitPercentageOfCompensation
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum percentage of participant's salary contribution to the benefit plan matched by the entity. + References No definition available. + Details
Name: | cvi_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | cvi_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of employer matching contribution to the first six percent of the participant's compensation contributed to the benefit plan sponsored by the entity. + References No definition available. + Details
Name: | cvi_DefinedContributionPlanEmployerMatchLevelOne
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period over which the matching contribution vest under the defined contribution plan. + References No definition available. + Details
Name: | cvi_DefinedContributionPlanMatchingContributionVestingPeriod
Namespace Prefix: | cvi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cvi_DefinedContributionPlansDisclosureLineItems
Namespace Prefix: | cvi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of defined-contribution 401(k) plans. + References No definition available. + Details
Name: | cvi_DefinedContributionPlansNumber
Namespace Prefix: | cvi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration