|
Common Stock and Stock Plans, ESOP (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Employee Stock Ownership Plan [Abstract] | |||
| Allocated shares (common) | 131,046,406 | 118,901,327 | 110,157,999 |
|
Preferred Stock [Member]
|
|||
| Employee Stock Ownership Plan [Abstract] | |||
| Unreleased shares | 858,759 | 618,382 | 414,019 |
| Fair value of unreleased ESOP | $ 859 | $ 618 | $ 414 |
| Dividends paid to ESOP | 95 | 76 | 51 |
|
Common Stock [Member]
|
|||
| Employee Stock Ownership Plan [Abstract] | |||
| Unreleased shares | 0 | 0 | 203,755 |
| Fair value of unreleased ESOP | 0 | 0 | 5 |
| Dividends paid to ESOP | $ 60 | $ 23 | $ 45 |