Other Liabilities (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Summary of Other liabilities
Deferred gains on asset sales	$ 968,000,000		$ 968,000,000		$ 930,000,000
SPG point liability and other obligations	703,000,000		703,000,000		702,000,000
Deferred income including VOI and residential sales	15,000,000		15,000,000		20,000,000
Benefit plan liabilities	58,000,000		58,000,000		61,000,000
Insurance reserves	46,000,000		46,000,000		46,000,000
Other	145,000,000		145,000,000		127,000,000
Other liabilities	1,935,000,000		1,935,000,000		1,886,000,000
Other Liabilities (Textuals) (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	$ 42,000,000	$ 40,000,000