Investments in Unconsolidated Entities (Details 3) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	10 Months Ended	12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 14, 2012 Klepierre	Dec. 31, 2013 McArthurGlen Group property	Jun. 30, 2013 McArthurGlen Group Minimum Item	Dec. 31, 2013 Europe property	Dec. 31, 2012 Europe Klepierre	Dec. 31, 2013 Europe Klepierre	Mar. 14, 2012 Europe Klepierre	Oct. 16, 2013 Europe McArthurGlen Group property	Dec. 31, 2013 Europe McArthurGlen Group	Oct. 16, 2013 Europe McArthurGlen Group Minimum	Oct. 16, 2013 Europe McArthurGlen Group Maximum
Schedule of Equity Method Investments
Shares owned									57,634,148
Joint venture ownership percentage				28.70%					28.90%				22.50%	90.00%
Quoted market price per share (in dollars per share)									$ 46.53
Excess investment										$ 1,200,000,000
Share of net income, net of amortization of our excess investment	205,259,000	131,907,000	81,238,000					500,000	20,700,000
Total assets								17,200,000,000	17,100,000,000
Total liabilities								12,400,000,000	12,300,000,000
Noncontrolling interests								1,900,000,000	1,700,000,000
Total revenues								1,100,000,000	1,500,000,000
Total operating income								394,700,000	989,600,000
Consolidated net Income								323,600,000	317,300,000
Number of outlets in which interest acquired					5		5				4
Purchase price of business acquired				2,000,000,000							496,700,000
Equity investment	$ 2,433,399,000	$ 2,108,966,000										$ 510,700,000
Number of joint ventures to invest in per definitive agreement						1