Supplemental Cash Flow Information - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 31, 2017
Supplemental Cash Flow Information [Line Items]
Notes receivable backed by real estate	$ 34,260	$ 32,100	$ 235,050
Capitalization for equity based compensation expense	28,800	25,800	22,700
Notes receivable backed by real estate	53,800		235,100
Notes exchanged			459,800
KTR Capital Partners and Affiliates [Member]
Supplemental Cash Flow Information [Line Items]
Secured Debt			290,700
Assumed debt			$ 170,100
Common [Member]
Supplemental Cash Flow Information [Line Items]
Number of share issued on debt conversion			11,900,000
Prologis, L.P. [Member]
Supplemental Cash Flow Information [Line Items]
Notes receivable backed by real estate	$ 34,260	$ 32,100
Prologis, L.P. [Member] | Common [Member]
Supplemental Cash Flow Information [Line Items]
Limited partnerships units redeemed	1,500,000	1,900,000
Prologis Targeted U S Logistics Fund [Member]
Supplemental Cash Flow Information [Line Items]
Equity ownership interest received	$ 1,100,000
Notes receivable backed by real estate	19,500
Secured Debt	956,000			$ 956,000
Unconsolidated Entities [Member]
Supplemental Cash Flow Information [Line Items]
Equity ownership interest received	$ 153,300	$ 135,300	$ 65,300