|
Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
|
Jun. 30, 2013
|
Dec. 31, 2012
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investment securities (Note 3) |
$ 43,661 |
$ 48,439 |
|
Amounts Offset In Statement Of Financial Position [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Derivative assets |
(6,806) |
(7,657) |
| Derivative liabilities |
(3,934) |
(2,908) |
|
Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Derivative assets |
1,034 |
3,557 |
| Derivative liabilities |
832 |
152 |
|
Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Derivative assets |
0 |
0 |
| Derivative liabilities |
0 |
0 |
|
Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Derivative assets |
7,660 |
10,934 |
| Derivative liabilities |
4,750 |
3,040 |
|
Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Derivative assets |
180 |
280 |
| Derivative liabilities |
16 |
20 |
|
Domestic Corporate Debt Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Domestic Corporate Debt Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
22,404 |
24,132 |
|
Domestic Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Domestic Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
19,197 |
20,580 |
|
Domestic Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
3,207 |
3,552 |
|
Commercial Mortgage Backed Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Commercial Mortgage Backed Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2,995 |
3,094 |
|
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2,990 |
3,088 |
|
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
5 |
6 |
|
US States and Political Subdivisions Debt Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
US States and Political Subdivisions Debt Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
4,316 |
4,546 |
|
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
|
0 |
|
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
4,218 |
4,469 |
|
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
98 |
77 |
|
Foreign Corporate Debt Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Foreign Corporate Debt Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2,092 |
2,415 |
|
Foreign Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
65 |
71 |
|
Foreign Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
843 |
1,132 |
|
Foreign Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
1,184 |
1,212 |
|
Asset-backed Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Asset-backed Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
5,987 |
5,738 |
|
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
641 |
715 |
|
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
5,346 |
5,023 |
|
Foreign Government Debt Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Foreign Government Debt Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2,288 |
1,763 |
|
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
1,416 |
702 |
|
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
834 |
1,019 |
|
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
38 |
42 |
|
US Treasury and Government [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
US Treasury and Government [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
955 |
3,565 |
|
US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
691 |
3,288 |
|
US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
264 |
277 |
|
Retained Interest [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Retained Interest [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
93 |
83 |
|
Retained Interest [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Retained Interest [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Retained Interest [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
93 |
83 |
|
Available-for-sale Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Available-for-sale Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
277 |
596 |
|
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
248 |
569 |
|
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
18 |
14 |
|
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
11 |
13 |
|
Trading [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Trading [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
138 |
245 |
|
Trading [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
136 |
245 |
|
Trading [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2 |
0 |
|
Trading [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Other 1 [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Other assets |
0 |
0 |
| Other liabilities |
0 |
0 |
|
Other 1 [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Other assets |
438 |
432 |
| Other liabilities |
22 |
23 |
|
Other 1 [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Other assets |
0 |
0 |
| Other liabilities |
0 |
0 |
|
Other 1 [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Other assets |
0 |
0 |
| Other liabilities |
22 |
23 |
|
Other 1 [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Other assets |
438 |
432 |
| Other liabilities |
0 |
0 |
|
Total [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Total assets |
(6,806) |
(7,657) |
| Total liabilities |
(3,934) |
(2,908) |
|
Total [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Total assets |
45,133 |
52,428 |
| Total liabilities |
854 |
175 |
|
Total [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Total assets |
1,865 |
1,587 |
| Total liabilities |
0 |
0 |
|
Total [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Total assets |
39,119 |
47,401 |
| Total liabilities |
4,772 |
3,063 |
|
Total [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Total assets |
10,955 |
11,097 |
| Total liabilities |
16 |
20 |
|
Residential Mortgage Backed Securities [Member] | Netting Adjustment [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Residential Mortgage Backed Securities [Member] | Net Balance [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2,116 |
2,262 |
|
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
0 |
0 |
|
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
2,025 |
2,162 |
|
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |
|
|
| Investments, Fair Value Disclosure |
$ 91 |
$ 100 |