Schedule IV - Mortgage Loans on Real Estate (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	$ 5,361.9
Carrying Value	5,347.8
CECL reserve	(201.9)
Total loans, net	5,145.8
Senior Loan 2 \| Life Science
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	229.6
Senior loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	5,361.9
Carrying Value	5,347.8
Senior loans \| Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	491.2
Carrying Value	$ 488.1
Senior loans \| Industrial \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.40%
Senior loans \| Industrial \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.90%
Senior loans \| Life Science
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	$ 505.7
Carrying Value	$ 505.2
Senior loans \| Life Science \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	1.00%
Senior loans \| Life Science \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	4.50%
Senior loans \| Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	$ 815.6
Carrying Value	$ 812.6
Senior loans \| Office \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.30%
Senior loans \| Office \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	4.10%
Senior loans \| Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	$ 1,767.9
Carrying Value	$ 1,763.2
Senior loans \| Multifamily \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.30%
Senior loans \| Multifamily \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	3.90%
Senior loans \| Hospitality
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	$ 149.0
Carrying Value	$ 147.8
Senior loans \| Hospitality \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	3.00%
Senior loans \| Hospitality \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	3.30%
Senior loans \| Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	3.00%
Principal Amount	$ 112.5
Carrying Value	$ 112.4
Senior loans \| Mixed Use
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	4.00%
Principal Amount	$ 24.4
Carrying Value	$ 24.4
Senior loans \| Senior Loan 1 \| Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.70%
Carrying Value	$ 252.3
Senior loans \| Senior Loan 2 \| Life Science
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	4.20%
Carrying Value	$ 229.2
Senior loans \| Senior Loan 3 \| Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	3.70%
Carrying Value	$ 224.5
Senior loans \| Senior Loan 4 \| Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.90%
Carrying Value	$ 220.0
Senior loans \| Senior Loan 5 \| Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	8.20%
Carrying Value	$ 216.4
Senior loans \| Senior Loan 6 \| Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	3.40%
Carrying Value	$ 180.3
Senior loans \| Senior Loan 7 \| Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest rates (as a percent)	2.80%
Carrying Value	$ 171.4
Mezzanine loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal Amount	0.0
Carrying Value	$ 0.0

KKR Real Estate Finance Trust Inc. 10-K