Investment Securities (Available-for-sale and Held-to-maturity Securities, Unrealized Losses) (Details)
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3 Months Ended |
9 Months Ended |
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|
Sep. 30, 2016
USD ($)
security
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Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
security
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Sep. 30, 2015
USD ($)
|
Dec. 31, 2015
USD ($)
security
|
| Schedule of Available-for-sale Securities [Line Items] |
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|
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| Purchase of investment securities available-for-sale |
|
|
$ 203,000,000
|
$ 783,000,000
|
|
| Sales of AFS securities |
$ 115,000,000
|
$ 0
|
290,000,000
|
0
|
|
| Sales of AFS securities, realized gain (loss) |
3,000,000
|
|
4,000,000
|
|
|
| Non-cash reclassification of investment securities AFS to HTM |
|
1,100,000,000
|
0
|
1,136,000,000
|
|
| Transfer of available-for-sale securities to held-to-maturity, premium |
|
8,000,000
|
|
|
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| Unrealized holding gain (loss), net of tax included in transfer |
|
5,000,000
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|
|
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| Gain (loss) related to transfer of HTM securities |
|
0
|
|
|
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| Purchase of investment securities HTM |
0
|
10,000,000
|
15,000,000
|
10,000,000
|
|
| Proceeds from sale of held-to-maturity securities |
0
|
|
|
|
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| Maturity of HTM securities |
|
25,000,000
|
126,000,000
|
38,000,000
|
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| Available-for-sale Securities Pledged as Collateral |
918,000,000
|
|
918,000,000
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|
$ 14,000,000
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| Agency - Commercial |
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|
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| Schedule of Available-for-sale Securities [Line Items] |
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| Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value |
$ 0
|
|
$ 0
|
|
$ 0
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| Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Positions | security |
0
|
|
0
|
|
0
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months or Over, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ 0
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value |
$ 20,000,000
|
|
$ 20,000,000
|
|
$ 471,000,000
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| Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Positions | security |
2
|
|
2
|
|
27
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ (2,000,000)
|
| Agency - Residential |
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|
|
|
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| Schedule of Available-for-sale Securities [Line Items] |
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|
|
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| Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value |
$ 0
|
|
$ 0
|
|
$ 0
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Positions | security |
0
|
|
0
|
|
0
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration 12 Months or Over, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ 0
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value |
$ 19,000,000
|
|
$ 19,000,000
|
|
$ 547,000,000
|
| Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Positions | security |
2
|
|
2
|
|
50
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| Held-to-maturity Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ (4,000,000)
|
| US Government-sponsored Enterprises Debt Securities |
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| Schedule of Available-for-sale Securities [Line Items] |
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|
|
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| Purchase of investment securities available-for-sale |
136,000,000
|
59,000,000
|
203,000,000
|
$ 783,000,000
|
|
| Non-cash reclassification of investment securities AFS to HTM |
|
$ 462,000,000
|
|
|
|
| Agency - Commercial |
|
|
|
|
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| Schedule of Available-for-sale Securities [Line Items] |
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|
|
|
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| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value |
$ 6,000,000
|
|
$ 6,000,000
|
|
$ 0
|
| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security |
1
|
|
1
|
|
0
|
| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ 0
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value |
$ 0
|
|
$ 0
|
|
$ 482,000,000
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Securities | security |
0
|
|
0
|
|
27
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ (3,000,000)
|
| Agency - Residential |
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|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
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| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value |
$ 0
|
|
$ 0
|
|
$ 8,000,000
|
| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security |
0
|
|
0
|
|
2
|
| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ 0
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value |
$ 75,000,000
|
|
$ 75,000,000
|
|
$ 224,000,000
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Securities | security |
6
|
|
6
|
|
15
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss |
$ 0
|
|
$ 0
|
|
$ (2,000,000)
|
| Municipal obligations |
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|
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| Schedule of Available-for-sale Securities [Line Items] |
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|
|
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| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Fair Value |
$ 0
|
|
$ 0
|
|
|
| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Number of Securities | security |
0
|
|
0
|
|
|
| Available-for-sale Securities, Unrealized Loss Position with Duration 12 Months and Over, Unrealized Loss |
$ 0
|
|
$ 0
|
|
|
| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Fair Value |
$ 1,000,000
|
|
$ 1,000,000
|
|
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| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Number of Securities | security |
1
|
|
1
|
|
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| Available-for-Sale Securities, Unrealized Loss Position with Duration Under 12 Months, Unrealized Loss |
$ 0
|
|
$ 0
|
|
|