INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains(Losses) (Details) - USD ($)
|
Dec. 31, 2020 |
Dec. 31, 2019 |
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
$ 16,175,000,000
|
$ 14,063,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
344,000,000
|
137,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
(34,000,000)
|
(51,000,000)
|
| Debt Securities, Available-for-sale |
16,485,000,000
|
14,149,000,000
|
| Debt Securities, Held-to-maturity |
8,861,000,000
|
9,070,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
394,000,000
|
119,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
(3,000,000)
|
| Debt Securities, Held-to-maturity, Fair Value |
9,255,000,000
|
9,186,000,000
|
| Equity Securities, FV-NI, Cost |
417,000,000
|
441,000,000
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax |
1,000,000
|
0
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Equity Securities, FV-NI |
418,000,000
|
441,000,000
|
| Available-for-sale Securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Financing Receivable, Accrued Interest, before Allowance for Credit Loss |
32,000,000
|
|
| Held-to-maturity Securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Financing Receivable, Accrued Interest, before Allowance for Credit Loss |
20,000,000
|
|
| U.S. Treasury securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
5,000,000
|
10,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale |
5,000,000
|
10,000,000
|
| Residential CMO |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
3,550,000,000
|
5,055,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
121,000,000
|
48,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
(5,000,000)
|
(18,000,000)
|
| Debt Securities, Available-for-sale |
3,666,000,000
|
5,085,000,000
|
| Debt Securities, Held-to-maturity |
1,779,000,000
|
2,351,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
88,000,000
|
33,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
(3,000,000)
|
| Debt Securities, Held-to-maturity, Fair Value |
1,867,000,000
|
2,381,000,000
|
| Residential MBS |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
7,843,000,000
|
4,180,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
97,000,000
|
45,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
(5,000,000)
|
(3,000,000)
|
| Debt Securities, Available-for-sale |
7,935,000,000
|
4,222,000,000
|
| Debt Securities, Held-to-maturity |
3,715,000,000
|
2,463,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
103,000,000
|
50,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
0
|
| Debt Securities, Held-to-maturity, Fair Value |
3,818,000,000
|
2,513,000,000
|
| Commercial MBS |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
1,151,000,000
|
979,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
21,000,000
|
1,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
(9,000,000)
|
(4,000,000)
|
| Debt Securities, Available-for-sale |
1,163,000,000
|
976,000,000
|
| Debt Securities, Held-to-maturity |
3,118,000,000
|
3,959,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
191,000,000
|
34,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
0
|
| Debt Securities, Held-to-maturity, Fair Value |
3,309,000,000
|
3,993,000,000
|
| Other agencies |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
60,000,000
|
165,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
2,000,000
|
1,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
0
|
(1,000,000)
|
| Debt Securities, Available-for-sale |
62,000,000
|
165,000,000
|
| Debt Securities, Held-to-maturity |
246,000,000
|
293,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
12,000,000
|
2,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
0
|
| Debt Securities, Held-to-maturity, Fair Value |
258,000,000
|
295,000,000
|
| Total U.S. Treasury, federal agency and other agency securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
12,609,000,000
|
10,389,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
241,000,000
|
95,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
(19,000,000)
|
(26,000,000)
|
| Debt Securities, Available-for-sale |
12,831,000,000
|
10,458,000,000
|
| Debt Securities, Held-to-maturity |
8,858,000,000
|
9,066,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
394,000,000
|
119,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
(3,000,000)
|
| Debt Securities, Held-to-maturity, Fair Value |
9,252,000,000
|
9,182,000,000
|
| Municipal securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
2,928,000,000
|
3,044,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
91,000,000
|
34,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
(15,000,000)
|
(23,000,000)
|
| Debt Securities, Available-for-sale |
3,004,000,000
|
3,055,000,000
|
| Debt Securities, Held-to-maturity |
3,000,000
|
4,000,000
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain |
0
|
0
|
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss |
0
|
0
|
| Debt Securities, Held-to-maturity, Fair Value |
3,000,000
|
4,000,000
|
| Private-label CMO |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
9,000,000
|
2,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale |
9,000,000
|
2,000,000
|
| Asset-backed securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
185,000,000
|
575,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
7,000,000
|
6,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
0
|
(2,000,000)
|
| Debt Securities, Available-for-sale |
192,000,000
|
579,000,000
|
| Corporate debt |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
440,000,000
|
49,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
5,000,000
|
2,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale |
445,000,000
|
51,000,000
|
| Other securities/Sovereign debt |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Debt Securities, Available-for-sale, Amortized Cost |
4,000,000
|
4,000,000
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Debt Securities, Available-for-sale |
4,000,000
|
4,000,000
|
| Mutual funds |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Equity Securities, FV-NI, Cost |
50,000,000
|
53,000,000
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Equity Securities, FV-NI |
50,000,000
|
53,000,000
|
| Equity securities |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Equity Securities, FV-NI, Cost |
8,000,000
|
1,000,000
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax |
1,000,000
|
0
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Equity Securities, FV-NI |
9,000,000
|
1,000,000
|
| Federal Home Loan Bank stock | Non-marketable equity securities: |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Equity Securities, FV-NI, Cost |
60,000,000
|
90,000,000
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Equity Securities, FV-NI |
60,000,000
|
90,000,000
|
| Federal Reserve Bank stock | Non-marketable equity securities: |
|
|
| Schedule of investment securities and other securities [Line Items] |
|
|
| Equity Securities, FV-NI, Cost |
299,000,000
|
297,000,000
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax |
0
|
0
|
| Equity Securities, FV-NI |
$ 299,000,000
|
$ 297,000,000
|