Reconciliation of Carrying Amounts of Real Estate Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Beginning Balance	$ 15,946	$ 15,642	$ 15,370
Additions:
Acquisitions	303	1,563
Capital expenditures and transfers from construction-in-progress	314	231	446
Deductions:
Dispositions and other	(694)	(954)	(174)
Assets held for sale		(444)
Impairments		(92)
Ending Balance	$ 15,869	$ 15,946	$ 15,642