CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
NET INCOME (LOSS)	$ (741)	$ 932	$ 1,151
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization	665	676	944
Amortization of finance costs, discounts and premiums, net	8	6	7
Loss on extinguishment of debt	36	56
Stock compensation expense	17	15	14
Deferred income taxes	(165)	7	4
Other gains	(208)	(340)	(902)
Loss on foreign currency transactions and derivatives		1
Gain on property insurance settlement		(4)
Equity in (earnings) losses of affiliates	30	(14)	(30)
Change in due from/to managers	96	3	13
Distributions from investments in affiliates	10	11	58
Changes in other assets	(33)	7	(5)
Changes in other liabilities	(22)	(106)	46
Net cash provided by (used in) operating activities	(307)	1,250	1,300
INVESTING ACTIVITIES
Proceeds from sales of assets, net	281	1,192	1,605
Proceeds from loan receivable	28
Return of investments in affiliates		1	1
Advances to and investments in affiliates	(5)	(6)	(7)
Acquisitions		(602)	(1,025)
Capital expenditures:
Renewals and replacements	(156)	(222)	(274)
Return on investment	(343)	(336)	(200)
Property insurance proceeds		31
Net cash provided by (used in) investing activities	(195)	58	100
FINANCING ACTIVITIES
Financing costs	(11)	(17)
Issuances of debt	740	645
Draws on credit facility	2,245		360
Repayment of credit facility	(762)	(56)	(462)
Repurchase/redemption of senior notes	(450)	(650)
Redemption of preferred equity units of Host L.P.	(22)
Mortgage debt and other prepayments and scheduled maturities			(1)
Debt extinguishment costs	(35)	(50)
Common stock repurchase	(147)	(482)
Dividends on common stock	(320)	(623)	(629)
Distributions and payments to non-controlling interests	(3)	(75)	(8)
Other financing activities	(4)	(7)	(8)
Net cash provided by (used in) financing activities	1,231	(1,315)	(748)
Effects of exchange rate changes on cash held	(3)	1	(5)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	726	(6)	647
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF YEAR	1,750	1,756	1,109
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF YEAR	2,476	1,750	1,756
Supplemental disclosure of cash flow information:
Cash and cash equivalents	2,335	1,573	1,542
Restricted cash (included in other assets)	2	1	1
Furniture, fixtures and equipment replacement fund	139	176	213
Total cash and cash equivalents and restricted cash shown on the statements of cash flows	$ 2,476	$ 1,750	$ 1,756
Noncash Investing and Financing Items [Abstract]
Redemptions of limited partner interests for common stock (shares)	0.2	0.2	0.7
Redemptions of limited partner interests for common stock	$ 3	$ 2	$ 15
HOST HOTELS & RESORTS L.P.
OPERATING ACTIVITIES
NET INCOME (LOSS)	(741)	932	1,151
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization	665	676	944
Amortization of finance costs, discounts and premiums, net	8	6	7
Loss on extinguishment of debt	36	56
Stock compensation expense	17	15	14
Deferred income taxes	(165)	7	4
Other gains	(208)	(340)	(902)
Loss on foreign currency transactions and derivatives		1
Gain on property insurance settlement		(4)
Equity in (earnings) losses of affiliates	30	(14)	(30)
Change in due from/to managers	96	3	13
Distributions from investments in affiliates	10	11	58
Changes in other assets	(33)	7	(5)
Changes in other liabilities	(22)	(106)	46
Net cash provided by (used in) operating activities	(307)	1,250	1,300
INVESTING ACTIVITIES
Proceeds from sales of assets, net	281	1,192	1,605
Proceeds from loan receivable	28
Return of investments in affiliates		1	1
Advances to and investments in affiliates	(5)	(6)	(7)
Acquisitions		(602)	(1,025)
Capital expenditures:
Renewals and replacements	(156)	(222)	(274)
Return on investment	(343)	(336)	(200)
Property insurance proceeds		31
Net cash provided by (used in) investing activities	(195)	58	100
FINANCING ACTIVITIES
Financing costs	(11)	(17)
Issuances of debt	740	645
Draws on credit facility	2,245		360
Repayment of credit facility	(762)	(56)	(462)
Repurchase/redemption of senior notes	(450)	(650)
Redemption of preferred equity units of Host L.P.	(22)
Mortgage debt and other prepayments and scheduled maturities			(1)
Debt extinguishment costs	(35)	(50)
Distributions and payments to non-controlling interests		(68)	(1)
Other financing activities	(4)	(7)	(8)
Repurchase of common OP units	(147)	(482)
Distributions on common OP units	(323)	(630)	(636)
Net cash provided by (used in) financing activities	1,231	(1,315)	(748)
Effects of exchange rate changes on cash held	(3)	1	(5)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	726	(6)	647
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF YEAR	1,750	1,756	1,109
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF YEAR	2,476	1,750	1,756
Supplemental disclosure of cash flow information:
Cash and cash equivalents	2,335	1,573	1,542
Restricted cash (included in other assets)	2	1	1
Furniture, fixtures and equipment replacement fund	139	176	213
Total cash and cash equivalents and restricted cash shown on the statements of cash flows	$ 2,476	$ 1,750	$ 1,756
Noncash Investing and Financing Items [Abstract]
Redemptions of limited partner interests for common stock (shares)	0.2	0.2	0.7
Redemptions of limited partner interests for common stock	$ 3	$ 2	$ 15
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]
Bridge loan extended to purchaser against sale of property		28
Chicago Marriott Suites O'Hare | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Bridge loan extended to purchaser against sale of property		$ 28
Phoenician Land Parcel
INVESTING ACTIVITIES
Proceeds from sales of assets, net	83
Noncash Investing and Financing Items [Abstract]
Bridge loan extended to purchaser against sale of property	9
Phoenician Land Parcel | HOST HOTELS & RESORTS L.P.
Noncash Investing and Financing Items [Abstract]
Bridge loan extended to purchaser against sale of property	$ 9