Earnings Per Common Share or Unit - Computation of Basic and Diluted Earnings Per Share Unit (Parenthetical) (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potential dilutive shares and units outstanding	28,675	27,087	25,943
Prologis, L.P. [Member]
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potentially dilutive Class A Units	8,041	8,231	8,446
Total weighted average potentially dilutive other limited partnership units	299	375	891
Total weighted average potentially dilutive equity awards	7,798	7,933	8,175
Total weighted average potential dilutive shares and units outstanding	16,138	16,539	17,512
Total weighted average potential dilutive common limited partnership units	12,537	10,548	8,431