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Real Estate Facilities - Additional Information (Details)	6 Months Ended
	Jun. 30, 2024 USD ($)
Real Estate [Abstract]
Real estate acquisitions	$ 0

X

- Definition

Real estate acquisitions.

+ References

No definition available.

+ Details

Name:	sstvi_RealEstateAcquisitions
Namespace Prefix:	sstvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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