Summary of Property and Equipment (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Land and land improvements	$ 2,053	$ 2,062
Buildings and leasehold improvements	13,503	13,308
Furniture and equipment	2,430	2,362
Construction in progress	270	262
Property, Plant and Equipment, Gross, Total	18,256	17,994
Less accumulated depreciation and amortization	(8,643)	(8,323)
Property and equipment, net	$ 9,613	$ 9,671