Acquisition financing, committed amount.

No definition available.

Name:	ck1711929_AcquisitionFinancingCommittedAmount
Namespace Prefix:	ck1711929_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of real estate transactions.

+ References

No definition available.

+ Details

Name:	ck1711929_NumberOfRealEstateTransactions
Namespace Prefix:	ck1711929_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The net cash inflow or outflow from the sale or purchase of and distributions from real estate partnership investment during the period.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow from the acquisition of property as primarily intended to generate income for its owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

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

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

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

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Mar. 24, 2022 USD ($) RealEstatePropertyUnit	Jun. 30, 2020 USD ($)	Dec. 31, 2021 USD ($) Transaction	Dec. 31, 2020 USD ($) Transaction	Dec. 31, 2019 USD ($)
Subsequent Event [Line Items]
Payments to acquire real estate investments		$ 59,000
Number of Transactions \| Transaction			28	12
Proceeds from issuance of common stock, net			$ 5,643,318	$ 853,205	$ 761,712
Subsequent Event
Subsequent Event [Line Items]
Payments to acquire real estate investments	$ 200,000
Number of Transactions \| RealEstatePropertyUnit	4
Payments on real estate investments	$ 200,000
Acquisition financing committed by third party	1,000,000
Subsequent Event \| Primary Offering
Subsequent Event [Line Items]
Proceeds from issuance of common stock, net	$ 2,000,000