Number of regional , super regional and outlet malls.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

+ Details

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Period Type:	instant

- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

Name:	srt_StatementGeographicalAxis=spg_UnitedStatesAndPuertoRicoMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=spg_MallsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=spg_PremiumOutletCentersMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=spg_TheMillsMember
Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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Namespace Prefix:
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- Details

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Organization (Details)	Sep. 30, 2024 country property state	Sep. 07, 2023
TRG
Real Estate Properties
Ownership percentage	84.00%	84.00%
TRG \| TRG
Real Estate Properties
Number of regional, super regional and outlet malls	22
U.S. and Puerto Rico
Real Estate Properties
Number of properties	196
Number of U.S. states containing property locations \| state	37
U.S. and Puerto Rico \| Malls
Real Estate Properties
Number of properties	93
U.S. and Puerto Rico \| Premium Outlets
Real Estate Properties
Number of properties	70
U.S. and Puerto Rico \| The Mills
Real Estate Properties
Number of properties	14
U.S. and Puerto Rico \| Lifestyle centers
Real Estate Properties
Number of properties	6
U.S. and Puerto Rico \| Other retail properties
Real Estate Properties
Number of properties	13
Asia, Europe and Canada \| Premium and Designer Outlets
Real Estate Properties
Number of properties \| state	35
Europe \| Klepierre
Real Estate Properties
Ownership percentage	22.40%
Number of countries \| country	14