Long term debt excluding unsecured debt.

No definition available.

Name:	breit_LongTermDebtExcludingUnsecuredDebt
Namespace Prefix:	breit_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

No definition available.

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt premium.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=breit_OneMonthLondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=breit_MortgageNotesPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=breit_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
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Period Type:

Mortgage Notes, Term Loans, and Revolving Credit Facilities - Summary of Mortgage Notes, Term Loans and Revolving Credit Facilities (Details) - USD ($)		3 Months Ended
	Feb. 21, 2019	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 7,250,138,000	$ 6,885,142,000
Deferred financing costs, net		(55,491,000)	(53,546,000)
Premium on assumed debt, net		1,200,000	1,673,000
Total loans secured by the Company's properties, net		7,195,847,000	6,833,269,000
Mortgage notes, term loans, and revolving credit facilities, net		$ 7,195,847,000	6,833,269,000
Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		4.15%
Weighted Average Maturity Date		May 31, 2025
One-Month LIBOR [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		2.50%
Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 5,455,269,000	4,982,326,000
Fixed Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		4.13%
Weighted Average Maturity Date		Oct. 27, 2025
Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 1,794,869,000	1,902,816,000
Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date		Mar. 05, 2024
Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		1.71%
Mortgage Notes [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 5,255,269,000	4,782,326,000
Mortgage Notes [Member] \| Fixed Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		4.06%
Weighted Average Maturity Date		Nov. 04, 2025
Mortgage Notes [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 678,694,000	675,116,000
Mortgage Notes [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date		May 13, 2026
Mortgage Notes [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		1.71%
Mezzanine Loan [Member] \| Fixed Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 200,000,000	200,000,000
Mezzanine Loan [Member] \| Fixed Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.85%
Weighted Average Maturity Date		Apr. 05, 2025
Term Loan [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Principal Balance Outstanding		$ 603,500,000	603,500,000
Term Loan [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date		Dec. 27, 2022
Term Loan [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		1.69%
Unsecured Line of Credit [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date	Feb. 22, 2022
Maximum Facility Size	$ 350,000,000
Unsecured Line of Credit [Member] \| One-Month LIBOR [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.50%
Revolving Credit Facility [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Maximum Facility Size		$ 903,500,000
Principal Balance Outstanding		$ 512,675,000	$ 624,200,000
Revolving Credit Facility [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date		Sep. 05, 2022
Revolving Credit Facility [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		1.74%
Revolving Credit Facility [Member] \| Unsecured Line of Credit [Member] \| Variable Rate Loans [Member]
Debt Instrument [Line Items]
Maximum Facility Size		$ 600,000,000
Revolving Credit Facility [Member] \| Unsecured Line of Credit [Member] \| Variable Rate Loans [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Maturity Date		Apr. 10, 2021
Revolving Credit Facility [Member] \| Unsecured Line of Credit [Member] \| Variable Rate Loans [Member] \| One-Month LIBOR [Member] \| Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		2.40%