No definition available.

Name:	spgs_OfferingCost
Namespace Prefix:	spgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of Other Offering Cost

No definition available.

Name:	spgs_OtherOfferingCost
Namespace Prefix:	spgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the amount of offering fees incurred, including expensed and deferred underwriting fees.

No definition available.

Name:	spgs_SaleOfStockUnderwritingFeesIncludingDeferredUnderwritingFees
Namespace Prefix:	spgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of transaction costs attributable to warrants.

No definition available.

Name:	spgs_TransactionCostAttributableToWarrants
Namespace Prefix:	spgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of transaction costs allocated to the Class A shares in temporary equity.

No definition available.

Name:	spgs_TransactionCostsAllocatedToClassSharesTemporaryEquity
Namespace Prefix:	spgs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

Simon Property Group Acquisition Holdings, Inc. 10-Q