Real Estate - Summary of Acquisition (Parenthetical) (Detail) $ in Millions, BRL in Billions	1 Months Ended
	Aug. 31, 2017 USD ($) a Property	Aug. 31, 2017 BRL a Property	Dec. 31, 2017 a	Dec. 31, 2016 a	Dec. 31, 2015 a
Land [Member]
Business Acquisition [Line Items]
Square feet			5,191	5,892
BRAZIL
Business Acquisition [Line Items]
Payment to acquire interest in joint venture	$ 381.7	BRL 1.2
BRAZIL | Land [Member]
Business Acquisition [Line Items]
Square feet	531.4	531.4
BRAZIL | Prestabilized Properties [Member]
Business Acquisition [Line Items]
Number of buildings | Property	2	2
Acquisitions of Properties from Third Parties [Member] | Land [Member]
Business Acquisition [Line Items]
Square feet			1,392	776	690