AFS and HTM Debt Securities, Outstanding (Details) - USD ($)
$ in Millions |
6 Months Ended |
12 Months Ended |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
$ 253,774
|
$ 215,700
|
| Available-for sale, at amortized cost, net of allowance for credit losses, including portfolio level basis adjustments |
253,593
|
215,775
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
1,087
|
1,864
|
| Available-for-sale, gross unrealized gains |
1,087
|
1,864
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(4,535)
|
(3,991)
|
| Available-for-sale, gross unrealized losses |
(4,535)
|
(3,991)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
(3,448)
|
(2,127)
|
| Available-for-sale, net unrealized gains (losses) |
(3,267)
|
(2,202)
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
250,326
|
213,573
|
| Available-for-sale debt securities, at fair value |
250,326
|
213,573
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
198,573
|
208,023
|
| Held-to-maturity, gross unrealized gains |
100
|
189
|
| Held-to-maturity, gross unrealized losses |
(32,508)
|
(32,415)
|
| Held-to-maturity, net unrealized gains (losses) |
(32,408)
|
(32,226)
|
| Held-to-maturity, at fair value |
166,165
|
175,797
|
| Total AFS and HTM Debt securities: |
|
|
| Amortized cost including portfolio level basis adjustment, net |
452,166
|
423,798
|
| Debt securities, gross unrealized gains |
1,187
|
2,053
|
| Debt securities, gross unrealized losses |
(37,043)
|
(36,406)
|
| Debt securities, net unrealized gains (losses) |
(35,675)
|
(34,428)
|
| Fair value |
$ 416,491
|
$ 389,370
|
| AFS and HTM Debt Securities Textual [Abstract] |
|
|
| Debt securities, available-for-sale, accounting policy election, accrued interest writeoff method [Fixed List] |
Reversing interest income
|
Reversing interest income
|
| Debt securities, held-to-maturity, accounting policy election, accrued interest writeoff method [Fixed List] |
Reversing interest income
|
Reversing interest income
|
| Debt securities, available-for-sale, excluded accrued interest from amortized cost [true false] |
true
|
true
|
| Debt securities, held-to-maturity, excluded accrued interest [true false] |
true
|
true
|
| Allowance for credit loss, available-for-sale debt securities |
$ 0
|
$ 23
|
| Allowance for credit loss, held-to-maturity debt securities |
94
|
95
|
| Fair value hedging [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Portfolio level basis adjustments |
(181)
|
75
|
| Reversal of portfolio level basis adjustments |
181
|
(75)
|
| Securities of U.S. Treasury and federal agencies [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
81,100
|
51,738
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
251
|
308
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(229)
|
(237)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
22
|
71
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
81,122
|
51,809
|
| Available-for-sale debt securities, at fair value |
81,122
|
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
3,800
|
3,797
|
| Held-to-maturity, gross unrealized gains |
0
|
0
|
| Held-to-maturity, gross unrealized losses |
(1,757)
|
(1,747)
|
| Held-to-maturity, net unrealized gains (losses) |
(1,757)
|
(1,747)
|
| Held-to-maturity, at fair value |
2,043
|
2,050
|
| Securities of U.S. states and political subdivisions [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
10,741
|
10,706
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
41
|
34
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(307)
|
(343)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
(266)
|
(309)
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
10,475
|
10,397
|
| Available-for-sale debt securities, at fair value |
10,475
|
10,397
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
17,249
|
17,476
|
| Held-to-maturity, gross unrealized gains |
2
|
2
|
| Held-to-maturity, gross unrealized losses |
(2,938)
|
(3,270)
|
| Held-to-maturity, net unrealized gains (losses) |
(2,936)
|
(3,268)
|
| Held-to-maturity, at fair value |
14,313
|
14,208
|
| Securities of U.S. states and political subdivisions [Member] | Nontaxable preferred debt securities [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
2,300
|
2,500
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
2,300
|
2,500
|
| Federal agency mortgage-backed securities [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
149,841
|
142,022
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
716
|
1,447
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(3,985)
|
(3,389)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
(3,269)
|
(1,942)
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
146,572
|
140,080
|
| Available-for-sale debt securities, at fair value |
146,572
|
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
171,852
|
178,882
|
| Held-to-maturity, gross unrealized gains |
14
|
79
|
| Held-to-maturity, gross unrealized losses |
(27,757)
|
(27,353)
|
| Held-to-maturity, net unrealized gains (losses) |
(27,743)
|
(27,274)
|
| Held-to-maturity, at fair value |
144,109
|
151,608
|
| Non-agency mortgage-backed securities [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
1,807
|
2,141
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
5
|
3
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(10)
|
(18)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
(5)
|
(15)
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
1,802
|
2,126
|
| Available-for-sale debt securities, at fair value |
1,802
|
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
1,540
|
1,497
|
| Held-to-maturity, gross unrealized gains |
78
|
82
|
| Held-to-maturity, gross unrealized losses |
(42)
|
(39)
|
| Held-to-maturity, net unrealized gains (losses) |
36
|
43
|
| Held-to-maturity, at fair value |
1,576
|
1,540
|
| Collateralized loan obligations [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
9,793
|
7,895
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
14
|
11
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(1)
|
(2)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
13
|
9
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
9,806
|
7,904
|
| Available-for-sale debt securities, at fair value |
9,806
|
7,904
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
2,414
|
4,655
|
| Held-to-maturity, gross unrealized gains |
6
|
19
|
| Held-to-maturity, gross unrealized losses |
0
|
0
|
| Held-to-maturity, net unrealized gains (losses) |
6
|
19
|
| Held-to-maturity, at fair value |
2,420
|
4,674
|
| Other debt securities [Member] |
|
|
| Available-for-sale debt securities: |
|
|
| Available-for-sale, at amortized cost, net of allowance for credit losses, excluding portfolio level basis adjustments |
492
|
1,198
|
| Available-for-sale, gross unrealized gains, excluding portfolio level basis adjustments |
60
|
61
|
| Available-for-sale, gross unrealized losses, excluding portfolio level basis adjustments |
(3)
|
(2)
|
| Available-for-sale, net unrealized gains (losses), excluding portfolio level basis adjustments |
57
|
59
|
| Available-for-sale, at fair value excluding portfolio level basis adjustments |
549
|
1,257
|
| Available-for-sale debt securities, at fair value |
549
|
|
| Held-to-maturity debt securities: |
|
|
| Held-to-maturity, amortized cost, net |
1,718
|
1,716
|
| Held-to-maturity, gross unrealized gains |
0
|
7
|
| Held-to-maturity, gross unrealized losses |
(14)
|
(6)
|
| Held-to-maturity, net unrealized gains (losses) |
(14)
|
1
|
| Held-to-maturity, at fair value |
$ 1,704
|
$ 1,717
|