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Acquired Property Net (Tables)
6 Months Ended
Jun. 30, 2015
Real Estate [Abstract]  
Activity in acquired property and the related valuation allowance [Table Text Block]
The following table displays the activity in acquired property, and the related valuation allowance.
 
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 
 
2015
 
2014
 
2015
 
2014
 
 
(Dollars in millions)
Beginning balance — Acquired property
 
$
10,348

 
$
12,744

 
$
11,442

 
$
12,307

Additions
 
2,431

 
3,425

 
5,366

 
7,197

Disposals
 
(3,580
)
 
(3,873
)
 
(7,609
)
 
(7,208
)
Ending balance — Acquired property
 
9,199

 
12,296

 
9,199

 
12,296

Beginning balance — Valuation allowance
 
(830
)
 
(784
)
 
(824
)
 
(686
)
Decrease (increase) in valuation allowance
 
137

 
48

 
131

 
(50
)
Ending balance — Valuation allowance
 
(693
)
 
(736
)
 
(693
)
 
(736
)
Ending balance — Acquired property, net
 
$
8,506

 
$
11,560

 
$
8,506

 
$
11,560