Earnings Per Common Share or Unit - Computation of Basic and Diluted Earnings Per Share Unit (Parenthetical) (Detail) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total potential dilutive shares and units outstanding	25,128	25,277	18,041
Prologis, L.P. [Member]
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potentially dilutive limited partnership units outstanding	10,010	10,610	3,898
Total potentially dilutive stock awards outstanding	9,183	8,444	7,299
Total weighted average potentially dilutive shares and units from exchangeable debt outstanding	0	0	2,173
Total potential dilutive shares and units outstanding	19,193	19,054	13,370
Total potential dilutive shares and units outstanding limited partnership	5,935	6,223	4,671