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Debt - Narrative (Details)
 3 Months Ended 12 Months Ended
Jun. 30, 2023
debtInstrumentExtensionOption
Jun. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Sep. 30, 2015
USD ($)
singleFamilyProperty
Mar. 31, 2015
USD ($)
singleFamilyProperty
Dec. 31, 2014
USD ($)
singleFamilyProperty
Sep. 30, 2014
USD ($)
singleFamilyProperty
Dec. 31, 2023
USD ($)
debtInstrumentExtensionOption
singleFamilyProperty
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Debt Instrument [Line Items]                            
Percent of principal payment                     0.083%      
Certificates purchased                     $ 24,470,000 $ 22,583,000 $ 24,311,000  
Asset-backed securitization certificates                     25,666,000 25,666,000    
Proceeds from unsecured senior notes, net of discount                     0 876,813,000 $ 737,195,000  
Offering costs                     $ 22,530,000 $ 29,531,000    
2032 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Redeemable percentage of debt   100.00%                        
2052 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Redeemable percentage of debt   100.00%                        
Single Family Homes                            
Debt Instrument [Line Items]                            
Number of properties | singleFamilyProperty                     59,332      
Secured Debt                            
Debt Instrument [Line Items]                            
Minimum coverage ratio                     1.20      
Secured Debt | Single Family Homes | AMH 2014-SFR2 securitization                            
Debt Instrument [Line Items]                            
Debt instrument, face amount                   $ 513,300,000        
Debt instrument term                   10 years        
Weighted-average interest rate                   4.42%        
Number of properties | singleFamilyProperty                   4,487        
Interest rate                   0.00%        
Certificates purchased                   $ 25,700,000        
Asset-backed securitization certificates                   25,700,000        
Proceeds from asset-backed securitizations                   487,700,000        
Asset-backed securitizations, issuance costs                   $ 12,900,000        
Secured Debt | Single Family Homes | AMH 2014-SFR3 securitization                            
Debt Instrument [Line Items]                            
Debt instrument, face amount                 $ 528,400,000          
Debt instrument term                 10 years          
Weighted-average interest rate                 4.40%          
Number of properties | singleFamilyProperty                 4,503          
Proceeds from asset-backed securitizations                 $ 528,400,000          
Asset-backed securitizations, issuance costs                 $ 12,900,000          
Secured Debt | Single Family Homes | AMH 2015-SFR1 securitization                            
Debt Instrument [Line Items]                            
Debt instrument, face amount               $ 552,800,000            
Debt instrument term               30 years            
Weighted-average interest rate               4.14%            
Number of properties | singleFamilyProperty               4,661            
Proceeds from asset-backed securitizations               $ 552,800,000            
Asset-backed securitizations, issuance costs               $ 13,300,000            
Secured Debt | Single Family Homes | AMH 2015-SFR2 securitization                            
Debt Instrument [Line Items]                            
Debt instrument, face amount             $ 477,700,000              
Debt instrument term             30 years              
Weighted-average interest rate             4.36%              
Number of properties | singleFamilyProperty             4,125              
Proceeds from asset-backed securitizations             $ 477,700,000              
Asset-backed securitizations, issuance costs             $ 11,300,000              
Senior Notes | Senior Unsecured Notes                            
Debt Instrument [Line Items]                            
Proceeds from unsecured senior notes, net of discount   $ 870,300,000 $ 731,600,000                      
Underwriting fees   6,500,000 5,600,000                      
Unamortized discount on debt   23,200,000 12,800,000                      
Offering costs   1,700,000 1,400,000                      
Senior Notes | 2028 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Debt instrument, face amount           $ 500,000,000                
Interest rate           4.25%         4.25%      
Proceeds from unsecured senior notes, net of discount           $ 494,000,000                
Underwriting fees           3,200,000                
Unamortized discount on debt           2,800,000                
Offering costs           $ 1,900,000                
Redeemable percentage of debt           100.00%                
Effective interest rate           4.08%         4.08%      
Senior Notes | 2029 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Debt instrument, face amount         $ 400,000,000                  
Interest rate         4.90%           4.90%      
Proceeds from unsecured senior notes, net of discount         $ 395,300,000                  
Underwriting fees         2,600,000                  
Unamortized discount on debt         2,100,000                  
Offering costs         $ 1,000,000                  
Redeemable percentage of debt         100.00%                  
Senior Notes | 2031 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Debt instrument, face amount     $ 450,000,000                      
Interest rate     2.375%               2.38%      
Redeemable percentage of debt     100.00%                      
Effective interest rate     2.46%               2.46%      
Senior Notes | 2032 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Debt instrument, face amount   $ 600,000,000                        
Interest rate   3.625%                 3.63%      
Senior Notes | 2051 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Debt instrument, face amount     $ 300,000,000                      
Interest rate     3.375%               3.38%      
Redeemable percentage of debt     100.00%                      
Senior Notes | 2052 unsecured senior notes, net                            
Debt Instrument [Line Items]                            
Debt instrument, face amount   $ 300,000,000                        
Interest rate   4.30%                 4.30%      
Line of Credit | Credit facility                            
Debt Instrument [Line Items]                            
Interest rate                     6.38%      
Credit facility maximum borrowing capacity       $ 1,250,000,000             $ 1,250,000,000     $ 800,000,000
Number of debt instrument extension options | debtInstrumentExtensionOption 2                   2      
Extension period 6 months                   6 months      
Line of Credit | Credit facility | LIBOR                            
Debt Instrument [Line Items]                            
Debt instrument, basis spread on base rate       1.00%                    
Line of Credit | Credit facility | Fed Funds Effective Rate Overnight Index Swap Rate                            
Debt Instrument [Line Items]                            
Debt instrument, basis spread on base rate 0.50%     0.50%                    
Line of Credit | Credit facility | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Basis spread on variable rate 0.10%                   0.90%      
Debt instrument, basis spread on base rate 1.10%                          
Line of Credit | Credit facility | Minimum                            
Debt Instrument [Line Items]                            
Facility fee percentage 0.125%                          
Line of Credit | Credit facility | Minimum | LIBOR                            
Debt Instrument [Line Items]                            
Basis spread on variable rate       0.725%                    
Line of Credit | Credit facility | Minimum | Base Rate                            
Debt Instrument [Line Items]                            
Basis spread on variable rate 0.00%     0.00%                    
Line of Credit | Credit facility | Minimum | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Basis spread on variable rate 0.725%                          
Line of Credit | Credit facility | Maximum                            
Debt Instrument [Line Items]                            
Facility fee percentage 0.30%                          
Line of Credit | Credit facility | Maximum | LIBOR                            
Debt Instrument [Line Items]                            
Basis spread on variable rate       1.45%                    
Line of Credit | Credit facility | Maximum | Base Rate                            
Debt Instrument [Line Items]                            
Basis spread on variable rate 0.45%     0.45%                    
Line of Credit | Credit facility | Maximum | Secured Overnight Financing Rate (SOFR)                            
Debt Instrument [Line Items]                            
Basis spread on variable rate 1.45%