Annual report pursuant to Section 13 and 15(d)

Litigation, Other Contingencies and Guarantees (Narrative) (Details)

Litigation, Other Contingencies and Guarantees (Narrative) (Details) (USD $)
12 Months Ended
Feb. 01, 2014
Jul. 19, 2012
Nov. 30, 2013
SPG Reit Unit [Member]
Jan. 31, 2013
SPG Reit Unit [Member]
Jul. 20, 2012
SPG Reit Unit [Member]
Feb. 01, 2014
J.C.Penney Direct Marketing Services, Inc. [Member]
Feb. 01, 2014
Property Lease Guarantee [Member]
Feb. 01, 2014
Capital Contribution Guarantee [Member]
Loss Contingencies [Line Items]                
Estimate Potential Environmental Liabilities Minimum $ 17,000,000              
Estimate Potential Environmental Liabilities Maximum 24,000,000              
Recorded Best Estimate 19,000,000              
Guarantor Obligations, Origin and Purpose               In connection with the redemption of two million of our SPG REIT units (see Note 17), we agreed to make future capital contributions to SPG under certain circumstances.
Guarantor Obligations, Triggering Event               Capital contributions would be required only if (i) one or more unsecured senior notes or term loans of SPG are in default and (ii) the aggregate amount received and/or realized by the lenders with respect to such notes or loans upon the exhaustion of all other remedies available to them is less than the maximum total amount of all capital contribution commitments up to a maximum of the aggregate amount due under such notes or loans at the time of such default and demand under the capital contribution commitment agreements. 
Maximum Exposure of Guarantee           $ 20,000,000 $ 7,000,000 $ 360,000,000
REIT units redeemed   2,000,000 205,000 2,000,000 2,000,000      
Number of leases 4              
Guarantor Obligations, Term               On November 19, 2013 (Conversion Date), our SPG REIT units were converted to shares and in December 2013, we sold our remaining SPG REIT shares. The capital contribution obligation terminated 90 days from the Conversion Date on February 17, 2014.