Business Combinations - Allocation of Purchase Price (Detail) - USD ($) $ in Thousands			12 Months Ended
	May. 29, 2015	Oct. 20, 2014	Dec. 31, 2014
KTR Capital Partners and Affiliates [Member]
Business Acquisition [Line Items]
Investments in real estate properties	$ 5,428,422
Cash, accounts receivable and other assets	378,159
Debt, including premium	(735,172)
Accounts payable, accrued expenses and other liabilities	(80,740)
Total estimated purchase price	4,990,669
Noncontrolling interests	(2,253,234)
Common limited partnership units issued in the Operating Partnership	(181,170)
Total purchase price	$ 2,556,265
Prologis North American Industrial Fund [Member]
Business Acquisition [Line Items]
Investments in real estate properties			$ 2,639,481
Cash, accounts receivable and other assets			262,971
Debt, including premium			(1,195,213)
Accounts payable, accrued expenses and other liabilities			(70,226)
Total estimated purchase price		$ 46,800	1,100,000
Noncontrolling interests			(554,493)
Total purchase price			$ 1,082,520