Other Liabilities - Summary of Other Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Other Liabilities Disclosure [Abstract]
Deferred gains on asset sales	$ 917	$ 944
SPG point liability	719	733
Deferred revenue including VOIs and residential sales	38	33
Benefit plan liabilities	75	78
Insurance reserves	46	45
Other	126	123
Other liabilities	$ 1,921	$ 1,956