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Investment Securities (Tables)
 12 Months Ended
Dec. 31, 2012
Available-for-sale Securities [Abstract]  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
Our portfolio of securities includes bonds, equity securities, asset- and mortgage-backed securities, interests in securitization trusts, and other investments. The cost, fair value, and gross unrealized gains and losses on available-for-sale securities were as follows.
 
 
2012
 
2011
 
 
Amortized cost
 
Gross unrealized
 
Fair
value
 
Amortized cost
 
Gross unrealized
 
Fair
value
December 31, ($ in millions)
 
gains  
 
losses  
 
gains  
 
losses  
 
Available-for-sale securities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and federal agencies
 
$
2,212

 
$
3

 
$
(1
)
 
$
2,214

 
$
1,535

 
$
13

 
$
(2
)
 
$
1,546

U.S. states and political subdivisions
 
—

 
—

 
—

 
—

 
1

 
—

 
—

 
1

Foreign government
 
295

 
8

 
—

 
303

 
765

 
20

 
(1
)
 
784

Mortgage-backed residential (a)
 
6,779

 
130

 
(3
)
 
6,906

 
7,266

 
87

 
(41
)
 
7,312

Asset-backed
 
2,309

 
32

 
(1
)
 
2,340

 
2,600

 
28

 
(13
)
 
2,615

Corporate debt
 
1,209

 
57

 
(3
)
 
1,263

 
1,486

 
23

 
(18
)
 
1,491

Other
 
—

 
—

 
—

 
—

 
326

 
1

 
—

 
327

Total debt securities 
 
12,804

 
230

 
(8
)
 
13,026

 
13,979

 
172

 
(75
)
 
14,076

Equity securities
 
1,193

 
32

 
(73
)
 
1,152

 
1,188

 
25

 
(154
)
 
1,059

Total available-for-sale securities (b)
 
$
13,997

 
$
262

 
$
(81
)
 
$
14,178

 
$
15,167

 
$
197

 
$
(229
)
 
$
15,135

(a)
Residential mortgage-backed securities include agency-backed bonds totaling $4,983 million and $6,114 million at December 31, 2012, and December 31, 2011, respectively.
(b)
Certain entities related to our Insurance operations are required to deposit securities with state regulatory authorities. These deposited securities totaled $15 million and $16 million at December 31, 2012, and December 31, 2011, respectively.
Investments Classified by Contractual Maturity Date [Table Text Block]
The maturity distribution of available-for-sale debt securities outstanding is summarized in the following tables. Prepayments may cause actual maturities to differ from scheduled maturities.
 
 
Total
 
Due in
one year
or less
 
Due after
one year
through
five years
 
Due after
five years
through
ten years
 
Due after
ten years (a)
($ in millions)
 
Amount
 
Yield
 
Amount
 
Yield
 
Amount
 
Yield
 
Amount
 
Yield
 
Amount
 
Yield
December 31, 2012
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair value of available-for-sale debt securities (b)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and federal agencies
 
$
2,214

 
0.9
%
 
$
422

 
—
%
 
$
682

 
0.7
%
 
$
1,110

 
1.4
%
 
$
—

 
—
%
Foreign government
 
303

 
2.5

 
1

 
2.2

 
136

 
1.8

 
166

 
3.0

 
—

 
—

Mortgage-backed residential
 
6,906

 
2.7

 
—

 
—

 
—

 
—

 
35

 
4.3

 
6,871

 
2.7

Asset-backed
 
2,340

 
2.1

 
—

 
—

 
1,543

 
2.0

 
510

 
1.7

 
287

 
3.3

Corporate debt
 
1,263

 
5.1

 
9

 
3.2

 
560

 
4.0

 
596

 
6.0

 
98

 
5.8

Total available-for-sale debt securities
 
$
13,026

 
2.4

 
$
432

 
0.1

 
$
2,921

 
2.0

 
$
2,417

 
2.6

 
$
7,256

 
2.6

Amortized cost of available-for-sale debt securities
 
$
12,804

 
 
 
$
431

 
 
 
$
2,880

 
 
 
$
2,369

 
 
 
$
7,124

 
 
December 31, 2011
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair value of available-for-sale debt securities (b)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and federal agencies
 
$
1,546

 
0.9
%
 
$
231

 
—
%
 
$
1,202

 
0.9
%
 
$
113

 
2.2
%
 
$
—

 
—
%
U.S. states and political subdivisions
 
1

 
5.4

 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
5.4

Foreign government
 
784

 
4.4

 
77

 
7.7

 
506

 
4.3

 
201

 
3.3

 
—

 
—

Mortgage-backed residential
 
7,312

 
2.5

 
3

 
4.8

 
2

 
6.3

 
189

 
2.6

 
7,118

 
2.5

Asset-backed
 
2,615

 
2.1

 
—

 
—

 
1,599

 
1.9

 
574

 
1.9

 
442

 
3.2

Corporate debt
 
1,491

 
4.9

 
19

 
4.9

 
741

 
4.4

 
606

 
5.6

 
125

 
4.7

Other
 
327

 
1.4

 
316

 
1.3

 
—

 
—

 
11

 
4.6

 
—

 
—

Total available-for-sale debt securities
 
$
14,076

 
2.6

 
$
646

 
1.7

 
$
4,050

 
2.4

 
$
1,694

 
3.5

 
$
7,686

 
2.6

Amortized cost of available-for-sale debt securities
 
$
13,979

 
 
 
$
644

 
 
 
$
4,026

 
 
 
$
1,678

 
 
 
$
7,631

 
 
(a)
Investments with no stated maturities are included as contractual maturities of greater than 10 years. Actual maturities may differ due to call or prepayment options.
(b)
Yields on tax-exempt obligations are computed on a tax-equivalent basis.
Schedule of Realized Gain (Loss) [Table Text Block]
The following table presents gross gains and losses realized upon the sales of available-for-sale securities and other-than-temporary impairment.
Year ended December 31, ($ in millions)
2012
 
2011
 
2010
Gross realized gains
$
241

 
$
298

 
$
537

Gross realized losses
(34
)
 
(28
)
 
(34
)
Other-than-temporary impairment
(61
)
 
(11
)
 
(1
)
Net realized gains
$
146

 
$
259

 
$
502
Investment Income [Table Text Block]
The following table presents interest and dividends on available-for-sale securities.
Year ended December 31, ($ in millions)
2012
 
2011
 
2010
Taxable interest
$
262

 
$
327

 
$
296

Taxable dividends
30

 
24

 
17

Interest and dividends exempt from U.S. federal income tax
—

 
—

 
10

Interest and dividends on available-for-sale securities
$
292

 
$
351

 
$
323
Schedule of Unrealized Loss on Investments [Table Text Block]
The table below summarizes available-for-sale securities in an unrealized loss position in accumulated other comprehensive income. Based on the methodology described below that was applied to these securities, we believe that the unrealized losses relate to factors other than credit losses in the current market environment. As of December 31, 2012, we did not have the intent to sell the debt securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As of December 31, 2012, we had the ability and intent to hold equity securities with an unrealized loss position in accumulated other comprehensive income. As a result, we believe that the securities with an unrealized loss position in accumulated other comprehensive income are not considered to be other-than-temporarily impaired at December 31, 2012. Refer to Note 1 for additional information related to investment securities and our methodology for evaluating potential other-than-temporary impairments.
 
 
2012
 
2011
 
 
Less than
12 months
 
12 months
or longer
 
Less than
12 months
 
12 months
or longer
December 31, ($ in millions)
 
Fair
value
 
Unrealized
loss
 
Fair
value
 
Unrealized
loss
 
Fair
value
 
Unrealized
loss
 
Fair
value
 
Unrealized
loss
Available-for-sale securities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt securities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasury and federal agencies
 
$
244

 
$
(1
)
 
$
—

 
$
—

 
$
179

 
$
(2
)
 
$
—

 
$
—

Foreign government
 
11

 
—

 
—

 
—

 
197

 
(1
)
 
—

 
—

Mortgage-backed residential
 
493

 
(2
)
 
23

 
(1
)
 
2,302

 
(39
)
 
45

 
(2
)
Asset-backed
 
143

 
(1
)
 
1

 
—

 
994

 
(13
)
 
1

 
—

Corporate debt
 
120

 
(2
)
 
15

 
(1
)
 
444

 
(16
)
 
30

 
(2
)
Total temporarily impaired debt securities
 
1,011

 
(6
)
 
39

 
(2
)
 
4,116

 
(71
)
 
76

 
(4
)
Temporarily impaired equity securities
 
380

 
(39
)
 
218

 
(34
)
 
770

 
(148
)
 
18

 
(6
)
Total temporarily impaired available-for-sale securities
 
$
1,391

 
$
(45
)
 
$
257

 
$
(36
)
 
$
4,886

 
$
(219
)
 
$
94

 
$
(10
)