Earnings Per Common Share or Unit - Computation of Basic and Diluted Earnings Per Share Unit (Parenthetical) (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potential dilutive shares and units outstanding	27,391	24,650
Prologis, L.P. [Member]
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potentially dilutive Class A Units	8,356	8,512
Total weighted average potentially dilutive other limited partnership units	534	966
Total weighted average potentially dilutive equity awards	7,673	8,380
Total weighted average potential dilutive shares and units outstanding	16,563	17,858
Total weighted average potential dilutive common limited partnership units	10,828	6,792