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Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
partnership
hotel
Segment
shares
Dec. 31, 2023
USD ($)
hotel
shares
Dec. 31, 2022
USD ($)
Significant Accounting Policies [Line Items]      
Number of variable interest entity partnerships | partnership 5    
Total assets of VIE $ 13,048 $ 12,243  
Liabilities of VIE 6,271 5,417  
Combined carrying amount of investments $ 166 $ 126  
Percentage of property revenue allocated for renewal and replacement capital expenditures 5.00%    
Number of properties evaluated for impairment | hotel 1 1  
Impairment charges $ 0 $ 0  
Net income (loss) $ 9 11 $ 9
Number of majority-owned partnerships that have third-party, non-controlling ownership interests that have been consolidated | partnership 1    
Percentage greater than threshold of income tax examination minimum likelihood of tax benefits being realized upon settlement 50.00%    
Number of reportable segments | Segment 1    
RSU Awards | Vesting over one-year period      
Significant Accounting Policies [Line Items]      
Equity award vesting period 1 year    
RSU Awards | Vesting over two-year period      
Significant Accounting Policies [Line Items]      
Equity award vesting period 2 years    
RSU Awards | Vesting over three-year period      
Significant Accounting Policies [Line Items]      
Equity award vesting period 3 years    
Property, Plant and Equipment, Other Types      
Significant Accounting Policies [Line Items]      
Estimated useful lives 3 years    
Variable Interest Entities, Not Primary Beneficiary      
Significant Accounting Policies [Line Items]      
Number of variable interest entity partnerships | partnership 3    
Combined carrying amount of investments $ 77    
HOST HOTELS & RESORTS L.P.      
Significant Accounting Policies [Line Items]      
Total assets of VIE 13,048 12,243  
Liabilities of VIE 6,271 5,417  
Combined carrying amount of investments $ 166 $ 126  
Shares issuable upon conversion of OP units 1.021494 1.021494  
Common OP units outstanding (in shares) | shares 693.6 698.3  
HOST HOTELS & RESORTS L.P. | Redeemable Non Controlling Interests      
Significant Accounting Policies [Line Items]      
Common OP units outstanding (in shares) | shares 9.2 9.5  
Number of common shares if converted (in shares) | shares 9.4    
Houston Airport Marriott at George Bush Intercontinental | Variable Interest Entities      
Significant Accounting Policies [Line Items]      
Total assets of VIE $ 47    
Liabilities of VIE $ 26    
Houston Airport Marriott at George Bush Intercontinental | General Partner      
Significant Accounting Policies [Line Items]      
Percentage VIE ownership 85.00%    
Minimum      
Significant Accounting Policies [Line Items]      
Percentage of property revenue allocated for renewal and replacement capital expenditures 4.00%    
Minimum | Variable Interest Entities, Not Primary Beneficiary      
Significant Accounting Policies [Line Items]      
Percentage VIE ownership 11.00%    
Maximum      
Significant Accounting Policies [Line Items]      
Percentage of property revenue allocated for renewal and replacement capital expenditures 5.00%    
Maximum | Variable Interest Entities, Not Primary Beneficiary      
Significant Accounting Policies [Line Items]      
Percentage VIE ownership 32.00%    
Host L.P.      
Significant Accounting Policies [Line Items]      
Percentage of investment ownership 99.00%