Supplemental Cash Flow Information - Additional Information (Detail) (USD $)	6 Months Ended		9 Months Ended				3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Investment of Real Estate or Other Assets [Member]	Sep. 30, 2013 Investment of Real Estate or Other Assets [Member]	Mar. 31, 2013 Prologis European Logistics Partners [Member]
Real Estate Properties [Line Items]
Ownership interests received	$ 601,600,000						$ 1,300,000,000
Assumed debt	345,100,000						353,200,000
Percentage of ownership interests received							50.00%
Limited partnership units issued		804,734
Limited partnership units, value		31,300,000
Proceeds from contribution of properties to entities				19,500,000
Costs of share-based compensation awards			61,790,000		16,100,000	12,500,000
Interest paid in cash			222,100,000	308,900,000
Cash paid for income taxes			$ 93,900,000	$ 80,300,000