Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Percentage of agreement indemnification	100.00%
Outstanding performance and surety bonds	$ 178.4	$ 123.5

Percentage of actual capital gains tax liabilities used for indemnification amount.

No definition available.

Name:	pld_PercentageOfActualCapitalGainsTaxLiabilitiesUsedForIndemnificationAmount
Namespace Prefix:	pld_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration