v3.26.1
Total Equity and Other Comprehensive Income (Accumulated Other Comprehensive Income (Loss) Components) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance $ 63,676 $ 56,451 $ 60,636 $ 54,469
Other comprehensive income (loss), net of tax (347) 555 (712) 1,883
Equity, ending balance 64,061 57,655 64,061 57,655
Pretax loss included in AOCI from derivatives 230 265 230 265
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance (3,773) (5,237) (3,408) (6,565)
Other comprehensive income (loss), net of tax (347) 555 (712) 1,883
Equity, ending balance (4,120) (4,682) (4,120) (4,682)
Debt securities        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance (3,423) (4,396) (3,303) (5,099)
Other comprehensive income (loss), net of tax 82 199 (38) 902
Equity, ending balance (3,341) (4,197) (3,341) (4,197)
Cash flow hedge derivatives        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance (432) (689) (181) (1,314)
Other comprehensive income (loss), net of tax (420) 367 (671) 992
Equity, ending balance (852) (322) (852) (322)
Pension and other postretirement benefit plan adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance 124 (110) 118 (109)
Other comprehensive income (loss), net of tax (5) (15) 1 (16)
Equity, ending balance 119 (125) 119 (125)
Other        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance (42) (42) (42) (43)
Other comprehensive income (loss), net of tax (4) 4 (4) 5
Equity, ending balance $ (46) $ (38) $ (46) $ (38)