Schedule III - Real Estate and Accumulated Depreciation - Change in Total Cost of Properties (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Acquisitions	$ 1,872	[1]
Blackstone Group L.P. [Member]
Real Estate and Accumulated Depreciation [Line Items]
Acquisitions	$ 1,760

[1] In 2015, as part of a tax deferred exchange of real property, certain properties from sellers affiliated with The Blackstone Group L.P., a related party at the time of the transaction, were acquired for a total purchase price of $1.76 billion.