CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net income (loss)	$ (11)	$ (741)	$ 932
Adjustments to reconcile net income (loss) to net cash provided by (used in) operations:
Depreciation and amortization	762	665	676
Amortization of finance costs, discounts and premiums, net	10	8	6
Loss on extinguishment of debt	23	36	56
Stock compensation expense	18	17	15
Deferred income taxes	(93)	(165)	7
Other gains	(306)	(208)	(339)
Gain on property insurance settlement	0	0	(4)
Equity in (earnings) losses of affiliates	(31)	30	(14)
Change in due from/to managers	(151)	96	3
Distributions from investments in affiliates	21	10	11
Changes in other assets	10	(33)	7
Changes in other liabilities	40	(22)	(106)
Net cash provided by (used in) operating activities	292	(307)	1,250
INVESTING ACTIVITIES
Proceeds from sales of assets, net	729	281	1,192
Proceeds from loan receivable	9	28	0
Return of investments in affiliates	0	0	1
Advances to and investments in affiliates	(11)	(5)	(6)
Acquisitions	(1,458)	0	(602)
Capital expenditures:
Renewals and replacements	(134)	(156)	(222)
Return on investment	(293)	(343)	(336)
Property insurance proceeds	0	0	31
Net cash provided by (used in) investing activities	(1,158)	(195)	58
FINANCING ACTIVITIES
Financing costs	(8)	(11)	(17)
Issuances of debt	443	740	645
Draws on credit facility	0	2,245	0
Repayment of credit facility	(800)	(762)	(56)
Repurchase/redemption of senior notes	(400)	(450)	(650)
Redemption of preferred equity units of Host L.P.	0	(22)	0
Debt extinguishment costs	(22)	(35)	(50)
Issuance of common stock	138	0	0
Common stock repurchase	0	(147)	(482)
Dividends on common stock	0	(320)	(623)
Distributions and payments to non-controlling interests	0	(3)	(75)
Other financing activities	(8)	(4)	(7)
Net cash provided by (used in) financing activities	(657)	1,231	(1,315)
Effects of exchange rate changes on cash held	0	(3)	1
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	(1,523)	726	(6)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF YEAR	2,476	1,750	1,756
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF YEAR	953	2,476	1,750
Supplemental disclosure of cash flow information:
Cash and cash equivalents	807	2,335	1,573
Restricted cash (included in other assets)	2	2	1
Furniture, fixtures and equipment replacement fund	144	139	176
Total cash and cash equivalents and restricted cash shown on the statements of cash flows	$ 953	$ 2,476	$ 1,750
Noncash Investing and Financing Items [Abstract]
Redemptions of limited partner interests for common stock (shares)	0.1	0.2	0.2
Redemptions of limited partner interests for common stock	$ 2	$ 3	$ 2
HOST HOTELS & RESORTS L.P.
OPERATING ACTIVITIES
Net income (loss)	(11)	(741)	932
Adjustments to reconcile net income (loss) to net cash provided by (used in) operations:
Depreciation and amortization	762	665	676
Amortization of finance costs, discounts and premiums, net	10	8	6
Loss on extinguishment of debt	23	36	56
Stock compensation expense	18	17	15
Deferred income taxes	(93)	(165)	7
Other gains	(306)	(208)	(339)
Gain on property insurance settlement	0	0	(4)
Equity in (earnings) losses of affiliates	(31)	30	(14)
Change in due from/to managers	(151)	96	3
Distributions from investments in affiliates	21	10	11
Changes in other assets	10	(33)	7
Changes in other liabilities	40	(22)	(106)
Net cash provided by (used in) operating activities	292	(307)	1,250
INVESTING ACTIVITIES
Proceeds from sales of assets, net	729	281	1,192
Proceeds from loan receivable	9	28	0
Return of investments in affiliates	0	0	1
Advances to and investments in affiliates	(11)	(5)	(6)
Acquisitions	(1,458)	0	(602)
Capital expenditures:
Renewals and replacements	(134)	(156)	(222)
Return on investment	(293)	(343)	(336)
Property insurance proceeds	0	0	31
Net cash provided by (used in) investing activities	(1,158)	(195)	58
FINANCING ACTIVITIES
Financing costs	(8)	(11)	(17)
Issuances of debt	443	740	645
Draws on credit facility	0	2,245	0
Repayment of credit facility	(800)	(762)	(56)
Repurchase/redemption of senior notes	(400)	(450)	(650)
Redemption of preferred equity units of Host L.P.	0	(22)	0
Debt extinguishment costs	(22)	(35)	(50)
Issuance of common OP units	138	0	0
Distributions and payments to non-controlling interests	0	0	(68)
Other financing activities	(8)	(4)	(7)
Repurchase of common OP units	0	(147)	(482)
Distributions on common OP units	0	(323)	(630)
Net cash provided by (used in) financing activities	(657)	1,231	(1,315)
Effects of exchange rate changes on cash held	0	(3)	1
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	(1,523)	726	(6)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF YEAR	2,476	1,750	1,756
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF YEAR	953	2,476	1,750
Supplemental disclosure of cash flow information:
Cash and cash equivalents	807	2,335	1,573
Restricted cash (included in other assets)	2	2	1
Furniture, fixtures and equipment replacement fund	144	139	176
Total cash and cash equivalents and restricted cash shown on the statements of cash flows	953	$ 2,476	$ 1,750
Noncash Investing and Financing Items [Abstract]
Redemptions of limited partner interests for common stock (shares)		0.2	0.2
Redemptions of limited partner interests for common stock	2	$ 3	$ 2
Four Seasons Resort Orlando at Walt DisneyWorld Resort
Noncash Investing and Financing Items [Abstract]
Advanced deposists received	24
Four Seasons Resort Orlando at Walt DisneyWorld Resort | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Advanced deposists received	24
Hotel Van Zandt Austin
Noncash Investing and Financing Items [Abstract]
Mortgage loan	102
Hotel Van Zandt Austin | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Mortgage loan	$ 102
1 Hotel South Beach
Noncash Investing and Financing Items [Abstract]
Preferred units issued			23
Common units issued			3
1 Hotel South Beach | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Preferred units issued			23
Common units issued			3
Chicago Marriott Suites O'Hare
Noncash Investing and Financing Items [Abstract]
Notes receivable from sale of property			28
Chicago Marriott Suites O'Hare | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Notes receivable from sale of property			$ 28
Phoenician Land Parcel
INVESTING ACTIVITIES
Proceeds from sales of assets, net		83
Noncash Investing and Financing Items [Abstract]
Notes receivable from sale of property		9
Phoenician Land Parcel | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Notes receivable from sale of property		$ 9