Name:	spg_SignificantAccountingPoliciesLineItems
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Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).

No definition available.

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Data Type:	dtr-types:textBlockItemType
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Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity.

No definition available.

Name:	us-gaap_RedeemableNoncontrollingInterestTableTextBlock
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Data Type:	dtr-types:textBlockItemType
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Tabular disclosure of the presentation of foreign exchange contracts on the statement of financial position, including the fair value amounts and location of such amounts.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B

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Data Type:	dtr-types:textBlockItemType
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Period Type:	duration

Tabular disclosure of interest rate derivatives, including, but not limited to, the fair value of the derivatives, statement of financial position location, and statement of financial performance location of these instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C