Stockholders' Equity of Prologis, Inc - Summary of Taxability of Common and Preferred Stock Dividends (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	[1]	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Ordinary income	$ 1.23		$ 0.60	$ 0.36
Qualified dividend	0.01		0.15	0.08
Capital gains	0.52		0.93	1.08
Total distribution	1.76		1.68	1.52
Series Q Preferred Stock [Member]
Class of Stock [Line Items]
Ordinary income	2.91		2.02	0.77
Qualified dividend	0.08		0.29	0.62
Capital gains	1.28		1.96	2.88
Total distribution	$ 4.27		$ 4.27	$ 4.27

[1] Taxability for 2017 is estimated.