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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issued and Adopted Accounting Standards (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Joint interest receivables, allowance	$ 3.7	$ 0.4

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- Definition

Oil And Gas Joint Interest Billing Receivables, Allowance

+ References

No definition available.

+ Details

Name:	civi_OilAndGasJointInterestBillingReceivablesAllowance
Namespace Prefix:	civi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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