Host Inc. Earnings (Loss) Per Common Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]
NET INCOME (LOSS)	$ 325		$ 63		$ (16)
Less: Net (income) loss attributable to non-controlling interests	(8)		(2)		1
Net income (loss) attributable to Host Inc.	317		61		(15)
Diluted income (loss) attributable to Host Inc.	$ 317		$ 61		$ (15)
Basic weighted average shares outstanding	744.4		718.2		693.0
Diluted weighted average shares outstanding	747.9	[1]	719.6	[1]	693.0	[1]
Basic earnings (loss) per common share	$ 0.43		$ 0.08		$ (0.02)
Diluted earnings (loss) per common share	$ 0.42		$ 0.08		$ (0.02)

[1] There are 30 million, 40 million and 47 million potentially dilutive shares for our exchangeable senior debentures and shares granted under comprehensive stock plans which were not included in the computation of diluted EPS as of December 31, 2013, 2012 and 2011, respectively, because to do so would have been anti-dilutive for the period.