Financial Instruments and Fair Value Measurements - Additional Information (Detail)	3 Months Ended		9 Months Ended					3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2013 Euro [Member] Contract	Sep. 30, 2013 United States of America, Dollars Contract	Sep. 30, 2013 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] USD ($)	Sep. 30, 2012 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] USD ($)	Sep. 30, 2013 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] USD ($)	Sep. 30, 2012 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] USD ($)	Dec. 31, 2012 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] USD ($)	Sep. 30, 2013 Foreign Currency Forward Contracts [Member] USD ($)	Dec. 31, 2012 Foreign Currency Forward Contracts [Member] USD ($)	Sep. 30, 2013 Foreign Currency Forward Contracts [Member] USD ($)	Mar. 31, 2013 Interest Rate Swaps [Member] Nippon Prologis REIT Inc [Member] USD ($)	Sep. 30, 2013 June 2017 And June 2018 [Member] Foreign Currency Forward Contracts [Member] USD ($) Contract	Sep. 30, 2013 June 2017 And June 2018 [Member] Foreign Currency Forward Contracts [Member] EUR (€)	Sep. 30, 2013 June 2018 [Member] USD ($)	Sep. 30, 2013 June 2018 [Member] JPY (¥)	Sep. 30, 2013 June 2018 [Member] Foreign Currency Forward Contracts [Member] Contract
Derivative [Line Items]
Number of foreign currency forward contracts																	7	7			3
Foreign currency forward contracts maturity dates														April and May 2013			June 2017 and June 2018	June 2017 and June 2018	June 2018	June 2018
Aggregate notional amount																	$ 800,000,000	€ 599,900,000	$ 250,000,000	¥ 24,100,000,000
Derivative forward exchange rate																	1.33	1.33	96.54	96.54
Settled derivative contracts															1,300,000,000
Gain (loss) in other comprehensive income (loss)															4,300,000,000
Other assets													4,300,000		4,300,000
Accounts payable and accrued expenses	692,241,000		692,241,000		611,770,000								15,600,000	17,500,000	15,600,000
Accumulated other comprehensive loss								14,800,000		14,800,000		33,800,000	2,300,000	17,500,000	2,300,000
Comprehensive income (loss)	83,472,000	137,867,000	56,368,000	191,651,000									21,700,000		12,600,000
Maximum length of time hedged in Cash Flow Hedge			10 years
Number of interest rate swap contracts						1	1
Unsettled derivative contract included in accounts payable and accrued expenses	6,200,000		6,200,000		28,000,000
Interest expense reclassified	84,885,000	122,817,000	292,383,000	383,369,000					3,600,000		9,400,000
Estimate of additional interest expense reclassified										1,200,000
Foreign currency translation losses, net								2,600,000	8,700,000	14,100,000	9,800,000
Hedge ineffectiveness loss		600,000		3,100,000
Loss related to interest rate swaps																$ 7,800,000