|
Changes in Allowance for Loan Losses (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] | |||
| Balance at beginning of period | $ 54 | $ 53 | $ 45 |
| Charge-offs | (16) | (19) | (20) |
| Recoveries | 2 | 2 | 1 |
| Provision for loan losses | 16 | 18 | 27 |
| Balance at end of period | 56 | 54 | 53 |
|
Residential real estate mortgages
|
|||
| Financing Receivable, Allowance for Credit Losses [Line Items] | |||
| Balance at beginning of period | 40 | 38 | |
| Charge-offs | (7) | (11) | |
| Recoveries | 2 | 1 | |
| Provision for loan losses | 1 | 12 | |
| Balance at end of period | 36 | 40 | |
|
Home equity lines of credit
|
|||
| Financing Receivable, Allowance for Credit Losses [Line Items] | |||
| Balance at beginning of period | 14 | 15 | |
| Charge-offs | (9) | (8) | |
| Recoveries | 1 | ||
| Provision for loan losses | 15 | 6 | |
| Balance at end of period | $ 20 | $ 14 | |