Earnings Per Common Share or Unit - Computation of Basic and Diluted Earnings Per Share or Unit (Parenthetical) (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potential dilutive shares and units outstanding	27,939	27,391
Prologis, L.P. [Member]
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potentially dilutive Class A Units	8,062	8,356
Total weighted average potentially dilutive other limited partnership units	299	534
Total weighted average potentially dilutive equity awards	7,709	7,673
Total weighted average potential dilutive shares and units outstanding	16,070	16,563
Total weighted average potential dilutive common limited partnership units	11,869	10,828