Earnings Per Common Share or Unit - Computation of Basic and Diluted Earnings Per Share Unit (Parenthetical) (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potential dilutive shares and units outstanding	25,279	25,719	24,951	24,992
Prologis, L.P. [Member]
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potentially dilutive Class A Units	8,477	8,626	8,495	8,645
Total weighted average potentially dilutive other limited partnership units	925	1,718	945	1,772
Total weighted average potentially dilutive equity awards	8,432	9,355	8,391	8,583
Total weighted average potential dilutive shares and units outstanding	17,834	19,699	17,831	19,000
Total weighted average potential dilutive common limited partnership units	7,445	6,020	7,120	5,992