Partners' Capital of Prologis, L.P. - Additional Information (Detail) - $ / shares shares in Millions	1 Months Ended		12 Months Ended
	Oct. 31, 2015	May 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Common Units
Shareholders Equity [Line Items]
Common limited partnership units, shares	0.2
Dividends per share entitled, issued in acquisition	$ 0.40
Common Units | KTR Capital Partners and Affiliates [Member]
Shareholders Equity [Line Items]
Common limited partnership units, shares		4.5
Class A Common [Member]
Shareholders Equity [Line Items]
Common limited partnership units, shares	8.9
Weighted average fair value at date of issuance	$ 41.06
Dividends per share entitled, issued in acquisition	$ 0.64665
Class A units convertible into common limited partnership units			8.5	8.7
Limited partnership unit, redemption price per share			$ 43.11