Loans Held for Investment and the Allowance for Credit Losses - Additional Information (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2023 USD ($) rating loan property		Jun. 30, 2022 USD ($) loan	Jun. 30, 2023 USD ($) rating loan property		Jun. 30, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) loan
Accounts Notes And Loans Receivable [Line Items]
Loans held for investment	$ 22,500,000			$ 22,500,000				$ 26,400,000
Total loan commitment	4,869,045,000			4,869,045,000				5,429,146,000
Unfunded loan commitments	300,502,000			300,502,000				426,061,000
Proceeds from sale of loan	$ 47,800,000
Number of loans sold | loan	1
Conversion to real estate owned of loans held for investment				46,000,000		$ 0
Loan sale	$ 71,300,000
Loss on sale	24,100,000
Investment transaction expense	(600,000)
Unamortized loan fees included in Loans Held for Investment	(6,800,000)			(6,800,000)				(7,900,000)
Unamortized discounts included in loans held for investment at amortized cost	$ 12,900,000			$ 12,900,000				18,200,000
Weighted average risk rating | rating	3.2			3.2
Allowance for credit loss increase (decrease)	$ 55,900,000		$ 42,300,000	$ 63,700,000		47,200,000
Allowance for credit loss for macroeconomic events	23,400,000			52,600,000
Allowance for credit loss from individually assessed loans	57,400,000			$ 57,400,000
Allowance for credit loss as result of local market fundamentals	$ 10,800,000
Number of loans | loan	3			3
Number of office property | property	2			2
Number of mixed use property | property	1			1
Allowance for credit loss from sale of office property	$ (24,100,000)			$ (24,100,000)
Allowance for credit loss from conversion of office property	(9,000,000)			(9,000,000)
Total allowance for credit losses	278,285,000		93,383,000	278,285,000		93,383,000		214,586,000
Allowance for credit loss related to improved collateral fundamentals				(9,700,000)
Allowance for credit losses increase (decrease) due to increased repayments	(2,600,000)			(4,100,000)		804,400,000
Allowance for credit loss	$ 250,244,000	[1]	$ 93,400,000	250,244,000	[1]	93,400,000		197,272,000	[1]
Allowance for credit losses increase (decrease) due to increased loan origination				$ 800,000		$ 535,100,000
Number of loans satisfying criteria for individual assessment | loan	5			5
Number of loans on non-accrual status | loan	4			4
Number of loans on cost recovery status | loan	1			1
Number of loans repaid in full | loan			7
Loans accrued interest income	$ 0			$ 0				0
Accrued PIK interest outstanding	1,172,000			1,172,000			$ 1,172,000	1,714,000
Total PIK interest	0			0
Senior loans
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit loss	$ 250,244,000			$ 250,244,000				$ 197,272,000
Minimum
Accounts Notes And Loans Receivable [Line Items]
Terminal capitalization rate (in percent)	5.80%			5.80%
Minimum | Measurement Input, Discount Rate
Accounts Notes And Loans Receivable [Line Items]
Discount rate (in percent)	0.074			0.074
Maximum
Accounts Notes And Loans Receivable [Line Items]
Terminal capitalization rate (in percent)	12.00%			12.00%
Maximum | Measurement Input, Discount Rate
Accounts Notes And Loans Receivable [Line Items]
Discount rate (in percent)	0.140			0.140
One First Mortgage Loan, Office Property
Accounts Notes And Loans Receivable [Line Items]
Amortized cost of loan	$ 61,700,000			$ 61,700,000
Three First Mortgage Loan, Office Property
Accounts Notes And Loans Receivable [Line Items]
Allowance for credit loss	176,200,000			176,200,000
Four First Mortgage Loan, Office Property
Accounts Notes And Loans Receivable [Line Items]
Amortized cost of loan	438,300,000			438,300,000
Fifth First Mortgage Loan, Office Property
Accounts Notes And Loans Receivable [Line Items]
Amortized cost of loan	$ 54,000,000			$ 54,000,000
Real Estate
Accounts Notes And Loans Receivable [Line Items]
Number of loans on non-accrual status | loan	5			5				2
Real Estate | One First Mortgage Loan, Office Property
Accounts Notes And Loans Receivable [Line Items]
Amortized cost of loan	$ 492,300,000			$ 492,300,000				$ 506,700,000
Real Estate | Mortgage Loan, Retail Property
Accounts Notes And Loans Receivable [Line Items]
Amortized cost of loan	546,700,000			$ 546,700,000				$ 190,400,000
Two Loan Investments
Accounts Notes And Loans Receivable [Line Items]
Number of mortgage loans | loan				2
Total loan commitment	123,800,000			$ 123,800,000
Loans and leases receivable unpaid principal balance	111,200,000			111,200,000
Unfunded loan commitments	$ 12,600,000			$ 12,600,000
Seven Loan Investments
Accounts Notes And Loans Receivable [Line Items]
Number of mortgage loans | loan				7
Loan repayment principal amount				$ 380,300,000
Ten Loan Investments
Accounts Notes And Loans Receivable [Line Items]
Number of mortgage loans | loan				10
Interest received in kind				$ 126,600,000
Total loan repayments				507,000,000
One Loan
Accounts Notes And Loans Receivable [Line Items]
Conversion to real estate owned of loans held for investment				$ 55,000,000
Accrued PIK interest
Accounts Notes And Loans Receivable [Line Items]
Number of first mortgage loans held for investment | loan				1

[1] The Company’s consolidated Total Assets and Total Liabilities as of June 30, 2023 include assets and liabilities of variable interest entities (“VIEs”) of $2.8 billion and $2.1 billion, respectively. The Company’s consolidated Total Assets and Total Liabilities as of December 31, 2022 include assets and liabilities of VIEs of $3.3 billion and $2.5 billion, respectively. These assets can be used only to satisfy obligations of the VIEs, and creditors of the VIEs have recourse only to these assets, and not to TPG RE Finance Trust, Inc. See Note 5 to the Consolidated Financial Statements for details.(2)Includes $28.0 million and $17.3 million of reserve for expected losses for unfunded loan commitments as of June 30, 2023 and December 31, 2022, respectively.