XML 79 R48.htm IDEA: XBRL DOCUMENT v3.19.2

Accounting Change - Turnaround Expenses (Details)	12 Months Ended
	Dec. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Frequency of planned major maintenance activities	4 years

X

- Definition

Planned Major Maintenance Activities Frequency

+ References

No definition available.

+ Details

Name:	cvi_PlannedMajorMaintenanceActivitiesFrequency
Namespace Prefix:	cvi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingChangesAndErrorCorrectionsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration