Other Liabilities - Summary of Other Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Deferred gains on asset sales	$ 1,328	$ 1,329
SPG point liability	818	830
Deferred revenue	43	46
Benefit plan liabilities	44	45
Deferred rent	26	27
Insurance reserves	48	47
Other	100	97
Other liabilities	$ 2,407	$ 2,421