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Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions, $ in Millions | 12 Months Ended
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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% |  |

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