Change in Accumulated Depreciation and Amortization of Real Estate Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, and Accumulated Depreciation, Other Disclosure [Abstract]
Beginning Balance	$ 6,809	$ 6,364	$ 6,373
Depreciation and amortization	554	541	535
Dispositions and other	(555)	(96)	(544)
Depreciation on assets held for sale	182
Ending Balance	$ 6,626	$ 6,809	$ 6,364