Name:	o_DiscontinuedOperationsOtherRevenue
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Amount of property expenses attributable to the discontinued operations of an entity during the reporting period.

No definition available.

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

The number of impaired properties sold.

No definition available.

Name:	o_ImpairedPropertiesSoldNumber
Namespace Prefix:	o_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Element represents income (loss) from discontinued operations of real estate acquired for resale by a subsidiary, net of income tax, as a component of income before extraordinary items and accounting changes before amount of possible allocation to noncontrolling interests. Includes (net of tax): income (loss) from operations for phase-out period, gain (loss) on disposal, provision (or any reversals of) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

No definition available.

Name:	o_IncomeFromDiscontinuedOperationsRealEstateAcquiredForResaleByREITTaxableSubsidiary
Namespace Prefix:	o_
Data Type:	xbrli:monetaryItemType
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The number of investment properties classified as held for sale, reported as discontinued operations.

No definition available.

Name:	o_NumberOfInvestmentPropertiesClassifiedAsHeldForSaleAndPropertiesPreviouslySoldReportedAsDiscontinuedOperations
Namespace Prefix:	o_
Data Type:	xbrli:integerItemType
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The number of properties impaired.

No definition available.

Name:	o_PropertiesImpaired
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of expense from discontinued operations, that reflects the allocation of the cost of tangible and intangible assets over the assets' useful lives.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 47

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

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-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Standards Codification

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Amount of rental income attributable to the disposal group, including a component of the entity (discontinued operation).

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2611-110228

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-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph b(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

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-Section 45

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The amount of income (loss) derived from discontinued operations during the period, net of related tax effect, per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

No definition available.