Other Liabilities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Summary of Other liabilities
Deferred gains on asset sales	$ 959,000,000		$ 959,000,000		$ 930,000,000
SPG point liability and other obligations	709,000,000		709,000,000		702,000,000
Deferred income including VOI and residential sales	19,000,000		19,000,000		20,000,000
Benefit plan liabilities	56,000,000		56,000,000		61,000,000
Insurance reserves	46,000,000		46,000,000		46,000,000
Other	161,000,000		161,000,000		127,000,000
Other liabilities	1,950,000,000		1,950,000,000		1,886,000,000
Other Liabilities (Textual) [Abstract]
Deferred gains on sale of assets included in accrued expenses and other liabilities	1,000,000,000		1,000,000,000		1,000,000,000
Amortization of deferred gains	$ (22,000,000)	$ (20,000,000)	$ (64,000,000)	$ (60,000,000)