Organization (Details)	Mar. 14, 2012 Klepierre	Sep. 30, 2013 U.S. and Puerto Rico property Item	Sep. 30, 2013 U.S. and Puerto Rico Malls property	Sep. 30, 2013 U.S. and Puerto Rico Premium Outlets property	Sep. 30, 2013 U.S. and Puerto Rico Community/Lifestyle Centers property	Sep. 30, 2013 U.S. and Puerto Rico Other shopping centers or outlet centers property	Sep. 30, 2013 U.S. and Puerto Rico The Mills property	Sep. 30, 2013 Japan property	Dec. 31, 2012 Japan property	Sep. 30, 2013 Japan Premium Outlets property	Sep. 30, 2013 South Korea property	Dec. 31, 2012 South Korea property	Sep. 30, 2013 South Korea Premium Outlets property	Sep. 30, 2013 Canada Premium Outlets property	Sep. 30, 2013 Mexico property	Dec. 31, 2012 Mexico property	Sep. 30, 2013 Mexico Premium Outlets property	Sep. 30, 2013 Malaysia property	Dec. 31, 2012 Malaysia property	Sep. 30, 2013 Malaysia Premium Outlets property	Sep. 30, 2013 Europe Klepierre country	Sep. 30, 2013 Europe Shopping centers Minimum Klepierre property
Owned, developed and managed retail properties:
Number of income-producing properties		312	158	66	64	11	13	9	8	9	3	2	3	1	1	1	1	1	1	1		260
Number of U.S. states containing property locations		38
Joint venture ownership percentage	28.70%																				28.90%
Number of countries																					13