Credit Quality And Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
|||
| Retail loans secured by residential real estate in process of foreclosure | $ 0 | $ 0 | |||
| Commitments to lend additional funds to TDR borrowers | 21 | 31 | |||
| Foreclosed property | [1] | 5 | 5 | ||
| Principal Deferrals | |||||
| Days past due defined as subsequent default | 90 days | ||||
| Balance | 131 | $ 152 | |||
| Subsequent default during period | $ 0 | $ 0 | |||
| Interest Rate Reductions | |||||
| Days past due defined as subsequent default | 90 days | 90 days | |||
| Balance | $ 17 | $ 1 | |||
| Subsequent default during period | $ 0 | $ 0 | |||
| AB Note Restructures | |||||
| Days past due defined as subsequent default | 90 days | 90 days | |||
| Balance | $ 20 | $ 48 | |||
| Subsequent default during period | 0 | $ 0 | |||
| Residential Real Estate | |||||
| Foreclosed property | $ 4 | $ 4 | |||
| |||||