Fair Value, Option, Loans Held as Assets, Nonaccrual Status, Allowance for Credit Loss

No definition available.

Name:	cmft_FairValueOptionLoansHeldAsAssetsNonaccrualStatusAllowanceForCreditLoss
Namespace Prefix:	cmft_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair Value, Option, Loans Held as Assets, Real Estate Asset, Net

+ References

No definition available.

+ Details

Name:	cmft_FairValueOptionLoansHeldAsAssetsRealEstateAssetNet
Namespace Prefix:	cmft_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Impairment of Real Estate, Number Of Properties

+ References

No definition available.

+ Details

Name:	cmft_ImpairmentofRealEstateNumberOfProperties
Namespace Prefix:	cmft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loans Receivable, Fair Value Option, Measurement Input

+ References

No definition available.

+ Details

Name:	cmft_LoansReceivableFairValueOptionMeasurementInput
Namespace Prefix:	cmft_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Financing Receivables, Loan Investments

+ References

No definition available.

+ Details

Name:	cmft_NumberOfFinancingReceivablesLoanInvestments
Namespace Prefix:	cmft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Impaired Risk-Rated Loan Investments, Nonaccrual Status

+ References

No definition available.

+ Details

Name:	cmft_NumberOfImpairedRiskRatedLoanInvestmentsNonaccrualStatus
Namespace Prefix:	cmft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Properties Acquired Via Deed-In-Lieu Of Foreclosure

+ References

No definition available.

+ Details

Name:	cmft_NumberOfPropertiesAcquiredViaDeedInLieuOfForeclosure
Namespace Prefix:	cmft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Real Estate Properties Secured Through Foreclosure

+ References

No definition available.

+ Details

Name:	cmft_NumberOfRealEstatePropertiesSecuredThroughForeclosure
Namespace Prefix:	cmft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Real Estate Investments, Impaired, Net

+ References

No definition available.

+ Details

Name:	cmft_RealEstateInvestmentsImpairedNet
Namespace Prefix:	cmft_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

+ Details

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

- Definition

This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

+ Details

Name:	us-gaap_FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-2

+ Details

Name:	us-gaap_ImpairmentOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancialInstrumentAxis=cmft_FirstMortgageLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputCapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OtherPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=cmft_CondominiumUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cmft_FirstLienMortgageLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=us-gaap_ConsolidatedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Millions	1 Months Ended	6 Months Ended
FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Millions	Aug. 12, 2025 property	Jun. 30, 2025 USD ($) loan	Jun. 30, 2025 USD ($) loan property	Jun. 30, 2025 USD ($) loan	Jun. 30, 2024 USD ($) property
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of real estate properties secured through foreclosure \| property			2
Impairment of real estate, number of properties \| property			3		7
First Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of impaired risk-rated loans, nonaccrual status \| loan		0	0	0
First mortgage loans, credit loss reserve		$ 238.4	$ 238.4	$ 238.4
Number of loan investments \| loan		6	6	6
Nonaccrual status with a carrying value		$ 822.1	$ 822.1	$ 822.1
First Mortgage Loans \| Maximum \| Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		14.00%	14.00%	14.00%
First Mortgage Loans \| Maximum \| Terminal Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		9.00%	9.00%	9.00%
First Mortgage Loans \| Minimum \| Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		10.00%	10.00%	10.00%
First Mortgage Loans \| Minimum \| Terminal Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		8.00%	8.00%	8.00%
Commercial Real Estate \| First Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of the net real estate asset				$ 151.0
Property
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of real estate assets				7.7	$ 51.5
Property \| Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate asset deemed to be impaired		$ 105.0	$ 105.0	$ 105.0	115.3
Condominium Units
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of real estate, number of properties		0	0
Impairment of real estate assets					$ 5.5
First lien mortgage loan \| First Mortgage Loans \| Maximum \| Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		10.80%	10.80%	10.80%
First lien mortgage loan \| First Mortgage Loans \| Maximum \| Terminal Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		9.00%	9.00%	9.00%
First lien mortgage loan \| First Mortgage Loans \| Minimum \| Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		10.00%	10.00%	10.00%
First lien mortgage loan \| First Mortgage Loans \| Minimum \| Terminal Capitalization Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		8.50%	8.50%	8.50%
First lien mortgage loan \| Consolidated Properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of impaired risk-rated loans, nonaccrual status \| loan		2	2	2
First lien mortgage loan \| Consolidated Properties \| Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of real estate properties secured through foreclosure \| property			2
First lien mortgage loan \| Consolidated Properties \| Office \| Subsequent event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of properties acquired via deed-in-lieu of foreclosure \| property	1