DCT Transaction - Schedule of Purchase Price Allocated to DCT Net Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed (Detail) - DCT Transaction [Member] $ in Millions	Aug. 22, 2018 USD ($)
Business Acquisition [Line Items]
Net investments in real estate	$ 8,362
Intangible assets, net of intangible liabilities	292
Cash and other assets	24
Debt	(1,863)
Accounts payable, accrued expenses and other liabilities	(143)
Noncontrolling interests	(65)
Total purchase price, including transaction costs	$ 6,607