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v2.4.1.9

Impairments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 item
Impairments |  |
Provisions for impairment | $ 2.1 us-gaap_AssetImpairmentCharges | $ 1.7 us-gaap_AssetImpairmentCharges
Number of impaired properties sold |  | 4 o_ImpairedPropertiesSoldNumber
Restaurants - casual dining industry |  |
Impairments |  |
Number of impaired properties sold | 1 o_ImpairedPropertiesSoldNumber / us-gaap_StatementBusinessSegmentsAxis = o_RestaurantsCasualDiningIndustryMember | 2 o_ImpairedPropertiesSoldNumber / us-gaap_StatementBusinessSegmentsAxis = o_RestaurantsCasualDiningIndustryMember
Number of impaired properties held-for-sale | 1 o_ImpairedPropertiesHeldForSellNumber / us-gaap_StatementBusinessSegmentsAxis = o_RestaurantsCasualDiningIndustryMember |
Number of impaired properties from disposal of building | 1 o_PropertiesImpaired / us-gaap_StatementBusinessSegmentsAxis = o_RestaurantsCasualDiningIndustryMember |
Consumer electronics |  |
Impairments |  |
Number of impaired properties sold |  | 1 o_ImpairedPropertiesSoldNumber / us-gaap_StatementBusinessSegmentsAxis = o_ConsumerElectronicsMember
Home furnishings |  |
Impairments |  |
Number of impaired properties sold |  | 1 o_ImpairedPropertiesSoldNumber / us-gaap_StatementBusinessSegmentsAxis = o_HomeFurnishingsMember

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- Definition The number of impaired properties held-for-sale. + References No definition available. + Details
Name: | o_ImpairedPropertiesHeldForSellNumber
Namespace Prefix: | o_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of impaired properties sold. + References No definition available. + Details
Name: | o_ImpairedPropertiesSoldNumber
Namespace Prefix: | o_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of properties impaired. + References No definition available. + Details
Name: | o_PropertiesImpaired
Namespace Prefix: | o_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: 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=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=o_ConsumerElectronicsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=o_HomeFurnishingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=o_RestaurantsCasualDiningIndustryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |