Supplemental Disclosure of Noncash Investing and Financing Activities (Host Hotels & Resorts, L.P.) - Additional Information (Detail) In Millions, except Per Share data, unless otherwise specified		9 Months Ended			1 Months Ended				1 Months Ended		1 Months Ended
	Sep. 07, 2012 Room	Sep. 07, 2012 HOST HOTELS & RESORTS L.P. USD ($)	Sep. 09, 2011 HOST HOTELS & RESORTS L.P. USD ($)	Jun. 28, 2011 HOST HOTELS & RESORTS L.P. Secondary Fund	Jun. 28, 2011 HOST HOTELS & RESORTS L.P. Le Meridien Piccadilly USD ($)	Jun. 28, 2011 HOST HOTELS & RESORTS L.P. Le Meridien Piccadilly GBP (£)	Apr. 29, 2011 HOST HOTELS & RESORTS L.P. Hilton Melbourne South Wharf USD ($) Room	Apr. 29, 2011 HOST HOTELS & RESORTS L.P. Hilton Melbourne South Wharf AUD	Jun. 30, 2011 HOST HOTELS & RESORTS L.P. Exchangeable Senior Debentures 3.25 Percent USD ($)	Mar. 17, 2011 HOST HOTELS & RESORTS L.P. Manchester Grand Hyatt San Diego Room	Mar. 17, 2011 HOST HOTELS & RESORTS L.P. Manchester Grand Hyatt San Diego Common Units USD ($)
Other Significant Noncash Transactions [Line Items]
Common operating partnership units, value		$ 8	$ 4
Shares issued for converted units, shares		0.5	0.2
Exchangeable Debentures									134
Debt interest rate									3.25%
Debt converted into shares of Host Inc. common stock									8.8
Property transfer price					102	64
Mortgage debt assumed					52	32
Capital lease transferred					61	38
Host's limited partner interest				33.40%
Proceeds from transfer of Le Meridien Piccadilly to the Euro JV Fund II			40		40	25
Common voting interest acquired							75.00%	75.00%
Number of rooms	64,648						364	364		1,625
Mortgage debt assumed in connection with acquisition							86	80
Premium on mortgage debt							0.5
OP Units exchanged for ownership right, units											0.3
OP Units exchanged for ownership right, value per unit											$ 18.741
OP Units exchanged for ownership right, value											$ 6