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- References

No definition available.

Name:	o_FiniteLivedIntangibleAssetsAmortizationExpenseIncreaseDecreaseAbstract
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Represents the amount of increase (decrease) in rental income expected to be recognized from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecrease
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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- References

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseAbstract
Namespace Prefix:	o_
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Represents the amount of increase (decrease) in rental income expected to be recognized after the fifth fiscal year following the latest fiscal year from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseAfterYearFive
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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Represents the amount of increase (decrease) in rental income expected to be recognized in the remainder of the fifth fiscal year following the latest fiscal year from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseRemainderOfFiscalYear
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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Represents the amount of increase (decrease) in rental income expected to be recognized during the fifth fiscal year following the latest fiscal year from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFive
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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Represents the amount of increase (decrease) in rental income expected to be recognized during the fourth fiscal year following the latest fiscal year from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearFour
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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Represents the amount of increase (decrease) in rental income expected to be recognized during the third fiscal year following the latest fiscal year from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearThree
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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Represents the amount of increase (decrease) in rental income expected to be recognized during the second fiscal year following the latest fiscal year from assets, lacking physical substance with a finite life.

No definition available.

Name:	o_FiniteLivedIntangibleAssetsRentalIncomeIncreaseDecreaseYearTwo
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The number of new properties and properties under development in which the entity invested during the period.

No definition available.

Name:	o_RealEstatePropertyInvestmentsNumberOfNewPropertiesAndPropertiesUnderDevelopment
Namespace Prefix:	o_
Data Type:	xbrli:integerItemType
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Period Type:	duration

Represents the value of real estate acquired during the period.

No definition available.

Name:	o_RealEstatePropertyInvestmentsValueOfNewProperties
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of non-cash amortization of intangible asset (liability) for above and below market leases.

No definition available.

Name:	us-gaap_AmortizationOfAboveAndBelowMarketLeases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_AmortizationOfIntangibleAssets
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Namespace Prefix:	us-gaap_
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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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.

No definition available.

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

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_IncomeStatementLocationAxis=o_RentalRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_RealEstateInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
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