Investments in Unconsolidated Entities (Details 8) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 31, 2012 Retail properties property	Dec. 31, 2013 Retail properties property	Apr. 30, 2011 Mall	Dec. 31, 2012 Non-core retail property and Mall	Dec. 31, 2013 Equity Method Investments Unconsolidated property interests	Dec. 31, 2012 Equity Method Investments Unconsolidated property interests	Dec. 31, 2011 Equity Method Investments Unconsolidated property interests
Revenue:
Minimum rent									$ 3,201,958,000	$ 3,015,866,000	$ 2,664,724,000					$ 1,666,886,000	$ 1,487,554,000	$ 1,424,038,000
Overage rent									223,473,000	195,726,000	140,842,000					180,772,000	176,609,000	140,822,000
Tenant reimbursements									1,442,907,000	1,340,307,000	1,177,269,000					765,357,000	691,564,000	660,354,000
Other income									174,828,000	199,819,000	195,587,000					200,104,000	171,698,000	150,949,000
Total revenue	1,416,260,000	1,302,256,000	1,236,563,000	1,215,058,000	1,344,431,000	1,228,617,000	1,188,066,000	1,118,969,000	5,170,138,000	4,880,084,000	4,306,432,000					2,813,119,000	2,527,425,000	2,376,163,000
Operating Expenses:
Property operating									475,133,000	469,755,000	436,571,000					498,485,000	477,338,000	460,235,000
Depreciation and amortization									1,290,528,000	1,257,569,000	1,065,946,000					528,317,000	508,083,000	487,057,000
Real estate taxes									444,899,000	419,267,000	369,755,000					212,667,000	178,739,000	167,608,000
Repairs and maintenance									120,803,000	116,168,000	113,496,000					69,116,000	65,163,000	64,271,000
Advertising and promotion									126,210,000	118,790,000	107,002,000					62,339,000	55,175,000	50,653,000
Provision for credit losses									7,737,000	12,809,000	6,505,000					1,287,000	1,824,000	4,496,000
Other									88,405,000	90,482,000	89,066,000					156,115,000	170,510,000	148,110,000
Total operating expenses									2,754,449,000	2,659,484,000	2,363,278,000					1,528,326,000	1,456,832,000	1,382,430,000
OPERATING INCOME	692,546,000	600,565,000	564,890,000	557,689,000	614,598,000	564,953,000	524,327,000	516,721,000	2,415,689,000	2,220,600,000	1,943,154,000					1,284,793,000	1,070,593,000	993,733,000
Interest expense									(1,137,139,000)	(1,127,025,000)	(983,526,000)					(694,904,000)	(599,400,000)	(593,408,000)
Income from Continuing Operations																589,889,000	471,193,000	400,325,000
Gain (loss) from operations of discontinued joint venture interests																46,000	(20,311,000)	(57,961,000)
Gain (loss) on disposal of discontinued operations, net																51,164,000	(5,354,000)	347,640,000
Net Income																641,099,000	445,528,000	690,004,000
Third-Party Investors' Share of Net Income																353,708,000	239,931,000	384,384,000
Our Share of Net Income																287,391,000	205,597,000	305,620,000
Amortization of Excess Investment																(102,875,000)	(83,400,000)	(50,562,000)
Our Share of Loss (Gain) on Sale or Disposal of Assets and Interests in Unconsolidated Entities, net																	9,245,000	(173,820,000)
Income from Unconsolidated Entities									205,259,000	131,907,000	81,238,000					184,516,000	131,442,000	81,238,000
Number of properties disposed of during the period												3	3
Gain (loss) on disposition													$ 0	$ 7,800,000	$ (9,200,000)