Unconsolidated Entities - Information About Investments in Co-investment Ventures by Property Funds (Parenthetical) (Detail) $ / shares in Units, shares in Millions	1 Months Ended
	Oct. 31, 2017 USD ($)	Jan. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) ft² a Buildings $ / shares shares	Dec. 31, 2017 MXN / shares	Dec. 31, 2017 GBP (£) ft² a Buildings shares	Dec. 31, 2017 ¥ / shares	Aug. 31, 2017 ft² Property	Feb. 28, 2017	Dec. 31, 2016 USD ($) ft² a Buildings	Dec. 31, 2015 USD ($)
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Equity commitments			$ 71,600,000		£ 57,000,000
Investments in real estate properties			25,838,644,000						$ 27,119,330,000
Intercompany notes receivable			$ 210,000,000						$ 166,100,000	$ 189,700,000
Properties Under Development [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Square Feet | ft²			22,216,000		22,216,000				19,539,000
Investments in real estate properties			$ 1,047,316,000						$ 633,849,000
Number of buildings | Buildings			63		63				60
Land [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Square Feet | a			5,191		5,191				5,892
Investments in real estate properties			$ 1,154,383,000						$ 1,218,904,000
Prologis Mexico Industrial Fund [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Units outstanding | shares			295.5		295.5
Closing price of common stock | (per share)			$ 1.72	MXN 34.01
Prologis European Logistics Fund [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Ownership Percentage in property fund	25.60%
Gain on combination of ventures	$ 0
Prologis U.K. Logistics Venture [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Ownership Percentage in property fund								15.00%
Equity commitments			$ 477,500		£ 380,000
Europe Logistics Venture 1 [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Redeemed a portion of investment		$ 84,300,000
Nippon Prologis REIT Inc [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Units outstanding | shares			0.3		0.3
Closing price of common stock | (per share)			$ 2,117			¥ 238,300
Intercompany notes receivable			$ 106,200,000						$ 96,900,000
Prologis Brazil Logistics Partners Fund I [Member]
Schedule of Variable Interest Entities for Loans to Commercial Borrowers [Line Items]
Square Feet | ft²							2,800,000
Number of buildings | Property							9