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Summary of Significant Accounting Policies - Earnings (Loss) Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accounting Policies [Abstract]      
Net income (loss) $ 752 $ 643 $ (11)
Less: Net income attributable to non-controlling interests (12) (10) 0
NET INCOME (LOSS) ATTRIBUTABLE TO HOST HOTELS & RESORTS, INC. $ 740 $ 633 $ (11)
Basic weighted average shares outstanding (in shares) 709.7 714.7 710.3
Assuming distribution of common shares granted under the comprehensive stock plans, less shares assumed purchased at market (in shares) 3.1 2.8 0.0
Diluted weighted average shares outstanding (in shares) 712.8 717.5 710.3
Basic earnings (loss) per common share (in dollars per share) $ 1.04 $ 0.89 $ (0.02)
Diluted earnings (loss) per common share (in dollars per share) $ 1.04 $ 0.88 $ (0.02)