Business Combinations - Additional Information (Detail) shares in Millions, ft² in Millions, $ in Millions	7 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 shares	Dec. 31, 2015 USD ($)	May 29, 2015 USD ($) ft² Property
Business Acquisition [Line Items]
Business acquisition, common units issued | shares		4.1	4.6
Rental revenues of properties acquired	$ 235.7
Rental expenses of properties acquired	$ 56.9
KTR Capital Partners and Affiliates [Member]
Business Acquisition [Line Items]
Cash purchase price				$ 5,000.0
Assumed debt					$ 735.2
Prologis US Logistics Venture [Member]
Business Acquisition [Line Items]
Contribution received from venture partner		$ 2,300.0
Prologis US Logistics Venture [Member] | KTR Capital Partners and Affiliates [Member]
Business Acquisition [Line Items]
Number of buildings | Property					315
Square feet | ft²					59.0
Area of properties under development | ft²					3.6
Cash purchase price				$ 2,600.0
Acquisition costs incurred		$ 24.7
Prologis US Logistics Venture [Member] | KTR Capital Partners and Affiliates [Member] | Common [Member]
Business Acquisition [Line Items]
Business acquisition, common units issued | shares		4.5