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Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)(Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Pre-tax AOCI activity, Period Start | $ (3,912) | $ (3,773)
Tax Effect, period start | 984 | 961
Beginning Balance | 17,910 |
OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityUnrealizedGainLossBeforeAdjustmentBeforeTax | (153) |
Unrealized losses on securities transferred to held to maturity during the period, tax | (38) | 0
Unrealized losses on securities transferred from available for sale during the period | (115) | 0
Reclassification adjustments for amortization on unrealized losses on securities transferred to held for maturity, tax | 7 | 0
Reclassification adjustments for amortization on unrealized losses on securities transferred to held for maturity, after Tax | (15) | 0
Other Comprehensive Income (Loss), before Tax | 850 | (552)
Other Comprehensive Income (Loss), Tax | (214) | 140
Other comprehensive income (loss), net of tax | 636 | (412)
Stockholders Equity Other After Tax | 9 |
Stockholders Equity Other Tax | 0 |
Stockholders Equity Other Before Tax | 9 |
OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityBeforeAdjustmentTax | (38) | 0
Unrealized losses on securities transferred to held to maturity during the period | 115 | 0
Unrealized holding gains (losses) on available for sale securities, tax | 113 | (81)
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax | 345 | (237)
Reclassification adjustments for securities gains (losses) realized in net income, tax | 6 | 13
Reclassification adjustments for securities gains (losses) realized in net income (net of tax) | (19) | (37)
Unrealized holding gains (losses) on derivatives arising during the period | 203 | (303)
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (net of tax) | 4 | 4
Pre-tax AOCI activity, Period End | (3,053) | (4,325)
Ending Balance | 18,567 |
Tax Effect, period end | 770 | 1,101
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start | (2,928) | (2,812)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End | (2,283) | (3,224)
Unrealized losses on securities transferred to held to maturity: |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Pre-tax AOCI activity, Period Start | (744) | (9)
Tax Effect, period start | 188 | 1
Beginning Balance | (556) | (8)
OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityUnrealizedGainLossBeforeAdjustmentBeforeTax | (153) |
Unrealized losses on securities transferred to held to maturity during the period, tax | 38 |
Unrealized losses on securities transferred from available for sale during the period | (115) |
Reclassification adjustments for amortization on unrealized losses on securities transferred to held for maturity, before Tax | 22 | 0
Reclassification adjustments for amortization on unrealized losses on securities transferred to held for maturity, tax | (7) | 0
Reclassification adjustments for amortization on unrealized losses on securities transferred to held for maturity, after Tax | 15 | 0
Other Comprehensive Income (Loss), before Tax | (131) |
Other Comprehensive Income (Loss), Tax | 31 |
Other comprehensive income (loss), net of tax | (100) |
Pre-tax AOCI activity, Period End | (875) | (9)
Ending Balance | (656) | (8)
Tax Effect, period end | 219 | 1
Unrealized gains (losses) on securities available for sale: |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Pre-tax AOCI activity, Period Start | (1,958) | (2,759)
Tax Effect, period start | 490 | 703
Beginning Balance | (1,468) | (2,056)
Other Comprehensive Income (Loss), before Tax | 636 | (268)
Other Comprehensive Income (Loss), Tax | (157) | 68
Other comprehensive income (loss), net of tax | 479 | (200)
OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityArisingDuringBeforeTax | 153 |
OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityBeforeAdjustmentTax | 38 |
Unrealized losses on securities transferred to held to maturity during the period | 115 |
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax | 458 | (318)
Unrealized holding gains (losses) on available for sale securities, tax | 113 | 81
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax | 345 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | 25 | 50
Reclassification adjustments for securities gains (losses) realized in net income, tax | (6) | (13)
Reclassification adjustments for securities gains (losses) realized in net income (net of tax) | 19 | 37
Pre-tax AOCI activity, Period End | (1,322) | (3,027)
Ending Balance | (989) | (2,256)
Tax Effect, period end | 333 | 771
Unrealized gains (losses) on derivative instruments designated as cash flow hedges: |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Pre-tax AOCI activity, Period Start | (662) | (399)
Tax Effect, period start | 168 | 102
Beginning Balance | (494) | (297)
Other Comprehensive Income (Loss), before Tax | 339 | (290)
Other Comprehensive Income (Loss), Tax | (86) | 74
Other comprehensive income (loss), net of tax | 253 | (216)
OCI, before Reclassifications, before Tax, Attributable to Parent | 272 | (407)
OCI, before reclassifications, tax, attributable to parent | (69) | 104
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | (67) | (117)
Reclassification from AOCI, Current Period, Tax | 17 | (30)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | 50 | 87
Pre-tax AOCI activity, Period End | (323) | (689)
Ending Balance | (241) | (513)
Tax Effect, period end | 82 | 176
Defined benefit pension plans and other post employment benefit plans: |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Pre-tax AOCI activity, Period Start | (548) | (606)
Tax Effect, period start | 138 | 155
Beginning Balance | (410) | (451)
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income, before Tax | (6) | 6
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income, Tax | 2 | 2
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (net of tax) | (4) | 4
Pre-tax AOCI activity, Period End | (542) | (600)
Ending Balance | (406) | (447)
Tax Effect, period end | $ 136 | $ 153

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