Real Estate and Other, Net (Tables)
 12 Months Ended
Jan. 31, 2015
Real Estate and Other, Net [Abstract]  
Real Estate and Other, Net
The composition of Real estate and other, net was as follows:    
($ in millions)
 
2014
 
2013
 
2012
Gain on sale or redemption of non-operating assets, net:
 
 

 
 

 
 

Sale or Redemption of Simon Property Group, L.P. (SPG) REIT units
 
$
—

 
$
(24
)
 
$
(200
)
Sale of CBL & Associates Properties, Inc. (CBL) REIT shares
 
—

 
—

 
(15
)
Sale of leveraged leases
 
—

 
—

 
(28
)
Sale of investments in joint ventures
 
—

 
(85
)
 
(151
)
Sale of non-operating assets
 
(25
)
 
(23
)
 
(3
)
Net gain on sale or redemption of non-operating assets
 
(25
)
 
(132
)
 
(397
)
Dividend income from REITs
 
—

 
(1
)
 
(6
)
Investment income from home office land joint venture
 
(53
)
 
—

—

—

Investment income from joint ventures
 
(1
)
 
(6
)
 
(11
)
Net gain from sale of operating assets
 
(92
)
 
(17
)
 
—

Store impairments (Note 8)
 
30

 
18

 
26

Intangible asset impairment (Note 8)
 
—

 
9

 
—

Operating asset impairments
 
—

 
—

 
60

Other
 
(7
)
 
(26
)
 
4

Real estate and other (income)/expense, net
 
$
(148
)
 
$
(155
)
 
$
(324
)