CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
OPERATING ACTIVITIES
NET LOSS	$ (61)	$ (356)	$ (214)	$ (359)
Adjustments to reconcile net loss to net cash provided by (used in) operations:
Depreciation and amortization	169	168	334	332
Amortization of finance costs, discounts and premiums, net			5	3
Loss on extinguishment of debt				1
Stock compensation expense			9	7
Other gains	(3)	(15)	(2)	(13)
Equity in (earnings) losses of affiliates	(25)	25	(34)	21
Change in due from/to managers			(71)	53
Distributions from investments in affiliates			4
Changes in other assets			(64)	(51)
Changes in other liabilities			(7)	(9)
Net cash used in operating activities			(40)	(15)
INVESTING ACTIVITIES
Proceeds from sales of assets, net			6	11
Proceeds from loan receivable			9	28
Advances to and investments in affiliates			(8)	(3)
Acquisitions			(801)
Capital expenditures:
Renewals and replacements			(63)	(94)
Return on investment			(117)	(206)
Net cash used in investing activities			(974)	(264)
FINANCING ACTIVITIES
Financing costs			(3)	(5)
Draws on credit facility				1,500
Repayment of credit facility				(750)
Issuance of common stock			138
Common stock repurchase				(147)
Dividends on common stock				(320)
Distributions and payments to non-controlling interests				(3)
Other financing activities			(8)	(7)
Net cash provided by financing activities			127	268
Effects of exchange rate changes on cash held			2	(6)
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH			(885)	(17)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD			2,476	1,750	$ 1,750
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	1,591	1,733	1,591	1,733	2,476
Supplemental disclosure of cash flow information:
Cash and cash equivalents	1,450	1,578	1,450	1,578	2,335
Restricted cash (included in other assets)	2	1	2	1
Furniture, fixtures and equipment replacement fund	139	154	139	154	139
Total cash and cash equivalents and restricted cash shown in the statements of cash flows	1,591	1,733	1,591	1,733
Total interest paid			83	73
HOST HOTELS & RESORTS L.P.
OPERATING ACTIVITIES
NET LOSS	(61)	(356)	(214)	(359)
Adjustments to reconcile net loss to net cash provided by (used in) operations:
Depreciation and amortization	169	168	334	332
Amortization of finance costs, discounts and premiums, net			5	3
Loss on extinguishment of debt				1
Stock compensation expense			9	7
Other gains	(3)	(15)	(2)	(13)
Equity in (earnings) losses of affiliates	(25)	25	(34)	21
Change in due from/to managers			(71)	53
Distributions from investments in affiliates			4
Changes in other assets			(64)	(51)
Changes in other liabilities			(7)	(9)
Net cash used in operating activities			(40)	(15)
INVESTING ACTIVITIES
Proceeds from sales of assets, net			6	11
Proceeds from loan receivable			9	28
Advances to and investments in affiliates			(8)	(3)
Acquisitions			(801)
Capital expenditures:
Renewals and replacements			(63)	(94)
Return on investment			(117)	(206)
Net cash used in investing activities			(974)	(264)
FINANCING ACTIVITIES
Financing costs			(3)	(5)
Draws on credit facility				1,500
Repayment of credit facility				(750)
Repurchase of common OP units				147
Distributions on common OP units				323
Other financing activities			(8)	(7)
Net cash provided by financing activities			127	268
Issuance of common OP units			138
Repurchase of common OP units				(147)
Distributions on common OP units				(323)
Effects of exchange rate changes on cash held			2	(6)
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH			(885)	(17)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD			2,476	1,750	1,750
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	1,591	1,733	1,591	1,733	2,476
Supplemental disclosure of cash flow information:
Cash and cash equivalents	1,450	1,578	1,450	1,578	2,335
Restricted cash (included in other assets)	2	1	2	1
Furniture, fixtures and equipment replacement fund	139	154	139	154	$ 139
Total cash and cash equivalents and restricted cash shown in the statements of cash flows	$ 1,591	$ 1,733	1,591	1,733
Total interest paid			83	73
Four Seasons Resort Orlando
Noncash Investing And Financing Items [Abstract]
Advance deposits received			24
Four Seasons Resort Orlando | HOST HOTELS & RESORTS L.P.
Noncash Investing And Financing Items [Abstract]
Advance deposits received			$ 24
Phoenician Land Parcel
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