v3.24.3
Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)(Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2024
Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]                
Pre-tax AOCI activity, Period Start $ (4,379)   $ (3,773) $ (4,613)   $ (4,481) $ (3,773) $ (4,481)
OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityUnrealizedGainLossBeforeAdjustmentBeforeTax (436)              
Unrealized losses on securities transferred to held to maturity during the period, tax (111)     0     (111) 0
Unrealized losses on securities transferred from available for sale during the period (325)     0     (325) 0
Other Comprehensive Income (Loss), before Tax 1,839     (1,068)     1,233 (1,200)
Other Comprehensive Income (Loss), Tax (468)     272     (315) 307
Other comprehensive income (loss), net of tax 1,371 $ (41) (412) (796) $ (596) 499 918 (893)
OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityBeforeAdjustmentTax 111     0     111 0
Unrealized losses on securities transferred to held to maturity during the period 325     0     325 0
Unrealized holding gains (losses) on available for sale securities, tax 298     (203)     193 (177)
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax 870     (595)     560 (518)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 20     0     45 0
Reclassification adjustments for securities gains (losses) realized in net income (net of tax) (58)     (1)     (133) (3)
Pre-tax AOCI activity, Period End (2,540) (4,379)   (5,681) (4,613)   (2,540) (5,681)
Unrealized holding gains (losses) on derivatives arising during the period 354     (274)     (46) (496)
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (net of tax) (6)     (11)     (14) (21)
Tax Effect, period start 1,114   961 1,173   1,138 961 1,138
Tax Effect, period end 646 1,114   1,445 1,173   646 1,445
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start (3,265)   (2,812) (3,440)   (3,343) (2,812) (3,343)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End (1,894) (3,265)   (4,236) (3,440)   (1,894) (4,236)
Net change in unrealized gains (losses) on derivative instruments, net of tax 436     (213)     209 (400)
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 (8)   (9) (10)   (11) (9) (11)
OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityUnrealizedGainLossBeforeAdjustmentBeforeTax (436)           436  
Unrealized losses on securities transferred to held to maturity during the period, tax 111           111  
Unrealized losses on securities transferred from available for sale during the period (325)           (325)  
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, before Tax 1     0     2 1
Reclassification adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity, Tax 0     0     0 0
Reclassification adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity (net of tax) 1     0     2 1
Other Comprehensive Income (Loss), before Tax (435)           (434)  
Other Comprehensive Income (Loss), Tax 111           111  
Other comprehensive income (loss), net of tax (324)           (323)  
Pre-tax AOCI activity, Period End (443) (8)   (10) (10)   (443) (10)
Tax Effect, period start 1   1 2   2 1 2
Tax Effect, period end 112 1   2 2   112 2
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start (7)   (8) (8)   (9) (8) (9)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End (331) (7)   (8) (8)   (331) (8)
Unrealized gains (losses) on securities available for sale:                
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]                
Pre-tax AOCI activity, Period Start (3,074)   (2,759) (3,328)   (3,433) (2,759) (3,433)
Other Comprehensive Income (Loss), before Tax 1,682     (797)     1,367 (692)
Other Comprehensive Income (Loss), Tax (429)     203     (349) 177
Other comprehensive income (loss), net of tax 1,253     (594)     1,018 (515)
OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityArisingDuringBeforeTax 436           436  
OCIDebtSecuritiesAvailableForSaleUnrealizedGainLossTransferredToHeldToMaturityBeforeAdjustmentTax (111)           111  
Unrealized losses on securities transferred to held to maturity during the period 325           325  
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax 1,168     (798)     753 (695)
Unrealized holding gains (losses) on available for sale securities, tax 298     203     193 177
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax 870           560  
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 78     1     178 (3)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax (20)     0     (45) 0
Reclassification adjustments for securities gains (losses) realized in net income (net of tax) 58     1     133 3
Pre-tax AOCI activity, Period End (1,392) (3,074)   (4,125) (3,328)   (1,392) (4,125)
Tax Effect, period start 783   703 846   872 703 872
Tax Effect, period end 354 783   1,049 846   354 1,049
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start (2,291)   (2,056) (2,482)   (2,561) (2,056) (2,561)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End (1,038) (2,291)   (3,076) (2,482)   (1,038) (3,076)
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 (703)   (399) (719)   (468) (399) (468)
Other Comprehensive Income (Loss), before Tax 585     (285)     281 (536)
Other Comprehensive Income (Loss), Tax (149)     72     (72) 136
Other comprehensive income (loss), net of tax 436     (213)       (400)
Pre-tax AOCI activity, Period End (118) (703)   (1,004) (719)   (118) (1,004)
OCI, before Reclassifications, before Tax, Attributable to Parent 475     (367)     (62) (665)
OCI, before reclassifications, tax, attributable to parent (121)     93     16 169
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent (110)     (82)     (343) (129)
Reclassification from AOCI, Current Period, Tax (28)     (21)     (88) (33)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent 82     61     255 (96)
Tax Effect, period start 179   102 183   119 102 119
Tax Effect, period end 30 179   255 183   30 255
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start (524)   (297) (536)   (349) (297) (349)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End (88) (524)   (749) (536)   (88) (749)
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 (594)   (606) (556)   (569) (606) (569)
Pre-tax AOCI activity, Period End (587) (594)   (542) (556)   (587) (542)
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income, before Tax 7     14     19 27
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income, Tax (1)     (3)     (5) (6)
Reclassification adjustments for amortization of actuarial (gains) losses and settlements realized in net income (net of tax) 6     11     14 21
Tax Effect, period start 151   155 142   145 155 145
Tax Effect, period end 150 151   139 142   150 139
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start (443)   $ (451) (414)   $ (424) (451) (424)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End $ (437) $ (443)   $ (403) $ (414)   $ (437) $ (403)