Unconsolidated Entities (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Prologis [Member]
Summary of remaining equity commitments
Remaining equity commitments	$ 171.2
Venture partner [Member]
Summary of remaining equity commitments
Remaining equity commitments	1,066.4
Prologis Targeted U.S. Logistics Fund [Member] | Venture partner [Member]
Summary of remaining equity commitments
Remaining equity commitments	137.5
Prologis SGP Mexico Fund [Member] | Prologis [Member]
Summary of remaining equity commitments
Remaining equity commitments	24.6
Prologis SGP Mexico Fund [Member] | Venture partner [Member]
Summary of remaining equity commitments
Remaining equity commitments	98.1
Prologis Europe Logistics Fund [Member] | Prologis [Member]
Summary of remaining equity commitments
Remaining equity commitments	75.6
Prologis Europe Logistics Fund [Member] | Venture partner [Member]
Summary of remaining equity commitments
Remaining equity commitments	428.7
Prologis China Logistics Venture I [Member] | Prologis [Member]
Summary of remaining equity commitments
Remaining equity commitments	71.0
Prologis China Logistics Venture I [Member] | Venture partner [Member]
Summary of remaining equity commitments
Remaining equity commitments	$ 402.1