v3.25.2
Accumulated Other Comprehensive Income - Activity in AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Pretax unrealized losses $ 459 $ (24) $ 1,434 $ (548)
Other comprehensive income (loss), tax effect (110) 11 (344) 134
Other comprehensive income (loss), net of tax 349 (13) 1,090 (414)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 20,403 19,018 19,645 19,172
Other comprehensive income (loss), net of tax 349 (13) 1,090 (414)
Ending balance 21,124 19,226 21,124 19,226
Accumulated Other Comprehensive Loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other comprehensive income (loss), net of tax 349 (13) 1,090 (414)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (3,895) (4,888) (4,636) (4,487)
Other comprehensive income (loss), net of tax 349 (13) 1,090 (414)
Ending balance (3,546) (4,901) (3,546) (4,901)
Available-for-sale debt securities        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other comprehensive income (loss) before reclassifications, pre-tax activity 237 (5) 870 (241)
Other comprehensive income (loss), before reclassifications, tax effect (58) 4 (210) 59
Other comprehensive income (loss), before reclassifications, net activity 179 (1) 660 (182)
Reclassification adjustment, pre-tax activity 0 4 0 7
Reclassification adjustment, tax effect 0 (1) 0 (2)
Reclassification adjustment, net activity 0 (3) 0 (5)
Pretax unrealized losses 237 (1) 870 760
Other comprehensive income (loss), tax effect (58) 3 (210) (152)
Other comprehensive income (loss), net of tax 179 2 660 608
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (2,799) (3,488) (3,280) (4,094)
Other comprehensive income (loss), net of tax 179 2 660 608
Ending balance (2,620) (3,486) (2,620) (3,486)
Available-for-sale debt securities transferred to held-to-maturity securities        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other comprehensive income (loss) before reclassifications, pre-tax activity       (994)
Other comprehensive income (loss), before reclassifications, tax effect       209
Other comprehensive income (loss), before reclassifications, net activity       (785)
Reclassification adjustment, pre-tax activity 28 32 60 64
Reclassification adjustment, tax effect (6) (7) (13) (14)
Reclassification adjustment, net activity (22) (25) (47) (50)
Pretax unrealized losses 28 32 60 (930)
Other comprehensive income (loss), tax effect (6) (7) (13) 195
Other comprehensive income (loss), net of tax 22 25 47 (735)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (659) (760) (684) 0
Other comprehensive income (loss), net of tax 22 25 47 (735)
Ending balance (637) (735) (637) (735)
Cash flow hedge derivatives        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other comprehensive income (loss) before reclassifications, pre-tax activity 144 (145) 399 (557)
Other comprehensive income (loss), before reclassifications, tax effect (34) 36 (96) 132
Other comprehensive income (loss), before reclassifications, net activity 110 (109) 303 (425)
Reclassification adjustment, pre-tax activity 50 90 105 179
Reclassification adjustment, tax effect (12) (21) (25) (41)
Reclassification adjustment, net activity (38) (69) (80) (138)
Pretax unrealized losses 194 (55) 504 (378)
Other comprehensive income (loss), tax effect (46) 15 (121) 91
Other comprehensive income (loss), net of tax 148 (40) 383 (287)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (419) (619) (654) (372)
Other comprehensive income (loss), net of tax 148 (40) 383 (287)
Ending balance (271) (659) (271) (659)
Net periodic benefit costs        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Pretax unrealized losses 0 0 0 0
Other comprehensive income (loss), tax effect 0 0 0 0
Other comprehensive income (loss), net of tax 0 0 0 0
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (16) (17) (16) (17)
Other comprehensive income (loss), net of tax 0 0 0 0
Ending balance (16) (17) (16) (17)
Other        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Pretax unrealized losses 0 0 0 0
Other comprehensive income (loss), tax effect 0 0 0 0
Other comprehensive income (loss), net of tax 0 0 0 0
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (2) (4) (2) (4)
Other comprehensive income (loss), net of tax 0 0 0 0
Ending balance $ (2) $ (4) $ (2) $ (4)