Subsequent Events (Details) (USD $)	1 Months Ended	3 Months Ended
	Oct. 31, 2014	Mar. 31, 2015 properties
Subsequent Events Details [Abstract]
Number of banks in consortium		28
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,500,000,000
Interest Rate margin		0.925%
Facility Fee as Percentage of commitment fee		0.15%
Line of Credit Facility Maximum Borrowing Capacity Additional		1,000,000,000
Available In Alternate Currencies		$ 500,000,000
Term Loan Interest Rate Margin	1.15%
Debt instrument maturity date		Oct. 31, 2018