Business Combinations Purchase Price Percentage

No definition available.

Name:	ck0001585389_BusinessCombinationsPurchasePricePercentage
Namespace Prefix:	ck0001585389_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Guarantee obligations recourse percentage.

+ References

No definition available.

+ Details

Name:	ck0001585389_GuaranteeObligationsRecoursePercentage
Namespace Prefix:	ck0001585389_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Investments in unconsolidated real Estate ventures.

+ References

No definition available.

+ Details

Name:	ck0001585389_InvestmentsInUnconsolidatedRealEstateVenturesLineItems
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility increased amount based on conditions.

+ References

No definition available.

+ Details

Name:	ck0001585389_LineOfCreditFacilityIncreasedAmountBasedOnConditions
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loan to value ratio

+ References

No definition available.

+ Details

Name:	ck0001585389_LoanToValueRatio
Namespace Prefix:	ck0001585389_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of development real estate properties.

+ References

No definition available.

+ Details

Name:	ck0001585389_NumberOfDevelopmentRealEstateProperties
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of operating real estate properties.

+ References

No definition available.

+ Details

Name:	ck0001585389_NumberOfOperatingRealEstateProperties
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of self storage real estate joint ventures.

+ References

No definition available.

+ Details

Name:	ck0001585389_NumberOfSelfStorageRealEstateJointVentures
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=126966197&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=126966197&loc=d3e6578-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 18
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e62014-109447

+ Details

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

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(f))
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

+ Details

Name:	us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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
-Subparagraph (SX 210.5-02(22))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

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

- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=ck0001585389_SmartCentresStorageFinanceLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0001585389_MasterMortgageCommitmentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ck0001585389_RegentProperty1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ck0001585389_WhitbyPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ck0001585389_NorthWhitbyPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ck0001585389_SSTIVMergerAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ck0001585389_RegentPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ck0001585389_SSGTIIMergerAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=ck0001585389_DupontAndAuroraJointVenturePropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Investments in Unconsolidated Real Estate Ventures - Additional Information (Details) $ in Millions								3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 12, 2023 USD ($)	Jan. 12, 2023 CAD ($)	Jun. 01, 2022 USD ($)	May 25, 2022 USD ($)	May 25, 2022 CAD ($)	Apr. 30, 2021	Nov. 10, 2020 RealEstateVenture	Jun. 30, 2023 USD ($) RealEstateVenture	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) RealEstateVenture	Jun. 30, 2022 USD ($)	Dec. 31, 2027 USD ($)	Dec. 31, 2026 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 CAD ($) RealEstateVenture	Mar. 31, 2023 Property	Dec. 31, 2022 USD ($)	Dec. 31, 2022 CAD ($)	Sep. 13, 2022 CAD ($)	Jun. 01, 2022 CAD ($)	Oct. 07, 2021 USD ($)	Mar. 17, 2021 StorageFacility
Investments In Unconsolidated Real Estate Ventures [Line Items]
Purchase price										$ 20,000,000
Increased amount																			$ 120.0
Initial maximum amount available																					$ 700,000,000
Guarantee obligations recourse percentage								50.00%		50.00%					50.00%
Forecast
Investments In Unconsolidated Real Estate Ventures [Line Items]
Fund development costs												$ 3,000,000	$ 3,000,000	$ 3,000,000
SmartCentres Storage Finance LP \| Master Mortgage Commitment Agreement
Investments In Unconsolidated Real Estate Ventures [Line Items]
Outstanding amount								$ 91,600,000		$ 91,600,000					$ 121.3		$ 86,100,000	$ 116.7
Initial maximum amount available										7.60%
Maturity date						May 11, 2024
Loan to value ratio								70.00%		70.00%					70.00%
Regent Property
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity method investment, ownership percentage				50.00%	50.00%			50.00%		50.00%					50.00%
Regent Property \| SmartCentres Storage Finance LP
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity method investment, ownership percentage				50.00%	50.00%
Whitby Property
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%
Whitby Property \| SmartCentres Storage Finance LP
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%
North Whitby Property
Investments In Unconsolidated Real Estate Ventures [Line Items]
Purchase Price Percentage	50.00%	50.00%
Purchase price	$ 2,000,000.0	$ 2.7
Canada
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity in earnings (loss) of unconsolidated real estate ventures								$ 500,000	$ 200,000	$ 900,000	$ 400,000
Purchase Price Percentage										50.00%
Purchase price										$ 7,900,000
Canada \| Regent Property
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity method investment, ownership percentage								50.00%		50.00%					50.00%
Canada \| Regent Property \| SmartCentres Storage Finance LP
Investments In Unconsolidated Real Estate Ventures [Line Items]
Equity method investment, ownership percentage								50.00%		50.00%					50.00%
SST IV Merger Agreement
Investments In Unconsolidated Real Estate Ventures [Line Items]
Number of operating real estate properties \| Property																3
SST IV Merger Agreement \| Canada
Investments In Unconsolidated Real Estate Ventures [Line Items]
Number of self storage real estate joint ventures \| RealEstateVenture							6
Number of operating real estate properties \| StorageFacility																						3
Number of development real estate properties \| StorageFacility																						3
Regent Property
Investments In Unconsolidated Real Estate Ventures [Line Items]
Purchase Price Percentage				50.00%	50.00%
Purchase price				$ 2,700,000	$ 3.5
SSGT II Merger Agreement
Investments In Unconsolidated Real Estate Ventures [Line Items]
Number of operating real estate properties \| Property																1
Purchase price			$ 261,158,513
SSGT II Merger Agreement \| SmartCentres Storage Finance LP
Investments In Unconsolidated Real Estate Ventures [Line Items]
Initial maximum amount available																				$ 34.3
Guarantee obligations recourse percentage																				50.00%
SSGT II Merger Agreement \| Dupont and Aurora Joint Venture Properties \| SmartCentres Storage Finance LP
Investments In Unconsolidated Real Estate Ventures [Line Items]
Interests																				50.00%
SSGT II Merger Agreement \| Canada
Investments In Unconsolidated Real Estate Ventures [Line Items]
Number of self storage real estate joint ventures \| RealEstateVenture										3
Number of operating real estate properties \| RealEstateVenture								2		2					2
Number of development real estate properties \| RealEstateVenture								1		1					1