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Document and Entity Information (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Jun. 30, 2014
Feb. 26, 2015
Document Information      
Entity Registrant Name American Homes 4 Rent    
Entity Central Index Key 0001562401    
Document Period End Date Dec. 31, 2014    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float   $ 3.2dei_EntityPublicFloat  
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Document Type 10-K    
Class A common shares      
Document Information      
Entity Common Stock, Shares Outstanding     210,851,946dei_EntityCommonStockSharesOutstanding
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= us-gaap_CommonClassAMember
Class B common shares      
Document Information      
Entity Common Stock, Shares Outstanding     635,075dei_EntityCommonStockSharesOutstanding
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= us-gaap_CommonClassBMember
Series A Preferred Stock      
Document Information      
Entity Common Stock, Shares Outstanding     5,060,000dei_EntityCommonStockSharesOutstanding
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= us-gaap_SeriesAPreferredStockMember
Series B Preferred Stock      
Document Information      
Entity Common Stock, Shares Outstanding     4,400,000dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
Series C Preferred Stock      
Document Information      
Entity Common Stock, Shares Outstanding     7,600,000dei_EntityCommonStockSharesOutstanding
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= us-gaap_SeriesCPreferredStockMember