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AOCI (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 65,189 |
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | $ (379) | $ 357 | (947) | $ 1,320
Ending balance | 64,095 |  | 64,095 |
Total |  |  |  |
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (6,337) | (7,250) | (5,769) | (8,213)
OCI before reclassifications, net of tax | (463) | 280 | (1,094) | 1,187
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | (379) | 357 | (947) | 1,320
Ending balance | (6,716) | (6,893) | (6,716) | (6,893)
Total | Amounts reclassified from AOCI |  |  |  |
Amounts reclassified from AOCI: |  |  |  |
Before tax | 111 | 98 | 193 | 171
Tax effect | 27 | 21 | 46 | 38
Amounts reclassified, net of tax | 84 | 77 | 147 | 133
Pension and OPEB Costs |  |  |  |
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (387) | (643) | (381) | (648)
OCI before reclassifications, net of tax | 1 | 1 | (7) | 6
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | 1 | 2 | (5) | 7
Ending balance | (386) | (641) | (386) | (641)
Pension and OPEB Costs | Amounts reclassified from AOCI |  |  |  |
Amounts reclassified from AOCI: |  |  |  |
Before tax | 1 | 1 | 3 | 1
Tax effect | 1 | 0 | 1 | 0
Amounts reclassified, net of tax | 0 | 1 | 2 | 1
Cash Flow Hedges |  |  |  |
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (572) | (432) | (173) | (861)
OCI before reclassifications, net of tax | (505) | 205 | (932) | 563
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | (463) | 275 | (862) | 704
Ending balance | (1,035) | (157) | (1,035) | (157)
Cash Flow Hedges | Amounts reclassified from AOCI |  |  |  |
Amounts reclassified from AOCI: |  |  |  |
Before tax | 54 | 92 | 91 | 185
Tax effect | 12 | 22 | 21 | 44
Amounts reclassified, net of tax | 42 | 70 | 70 | 141
AFS Securities |  |  |  |
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (3,517) | (4,095) | (3,306) | (4,573)
OCI before reclassifications, net of tax | 39 | 69 | (158) | 612
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | 31 | 16 | (180) | 494
Ending balance | (3,486) | (4,079) | (3,486) | (4,079)
AFS Securities | Amounts reclassified from AOCI |  |  |  |
Amounts reclassified from AOCI: |  |  |  |
Before tax | (11) | (66) | (29) | (151)
Tax effect | (3) | (13) | (7) | (33)
Amounts reclassified, net of tax | (8) | (53) | (22) | (118)
HTM Securities |  |  |  |
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (1,862) | (2,075) | (1,909) | (2,125)
OCI before reclassifications, net of tax | 0 | 0 | 0 | 0
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | 50 | 59 | 97 | 109
Ending balance | (1,812) | (2,016) | (1,812) | (2,016)
HTM Securities | Amounts reclassified from AOCI |  |  |  |
Amounts reclassified from AOCI: |  |  |  |
Before tax | 67 | 71 | 128 | 136
Tax effect | 17 | 12 | 31 | 27
Amounts reclassified, net of tax | 50 | 59 | 97 | 109
Other, net |  |  |  |
AOCI, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 1 | (5) | 0 | (6)
OCI before reclassifications, net of tax | 2 | 5 | 3 | 6
Amounts reclassified from AOCI: |  |  |  |
Total OCI, net of tax | 2 | 5 | 3 | 6
Ending balance | 3 | 0 | 3 | 0
Other, net | Amounts reclassified from AOCI |  |  |  |
Amounts reclassified from AOCI: |  |  |  |
Before tax | 0 | 0 | 0 | 0
Tax effect | 0 | 0 | 0 | 0
Amounts reclassified, net of tax | $ 0 | $ 0 | $ 0 | $ 0

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