v3.24.4
Accumulated Other Comprehensive Income (Schedule of Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, balance at beginning of period $ (339)    
Net change in accumulated other comprehensive income (loss), net of tax 114 $ (245) $ (139)
Accumulated other comprehensive income (loss), net of tax, balance at end of period (225) (339)  
Unrealized Gains (Losses) on Available-for-Sale Investment Securities, Net of Tax [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, balance at beginning of period (136) 114 284
Net change in accumulated other comprehensive income (loss), net of tax 99 (250) (170)
Accumulated other comprehensive income (loss), net of tax, balance at end of period (37) (136) 114
Gains (Losses) on Cash Flow Hedges, Net of Tax [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, balance at beginning of period (14) (9) (12)
Net change in accumulated other comprehensive income (loss), net of tax 6 (5) 3
Accumulated other comprehensive income (loss), net of tax, balance at end of period (8) (14) (9)
Losses on Pension Plan, Net of Tax [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, balance at beginning of period (189) (199) (227)
Net change in accumulated other comprehensive income (loss), net of tax 9 10 28
Accumulated other comprehensive income (loss), net of tax, balance at end of period (180) (189) (199)
AOCI [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss), net of tax, balance at beginning of period (339) (94) 45
Net change in accumulated other comprehensive income (loss), net of tax 114 (245) (139)
Accumulated other comprehensive income (loss), net of tax, balance at end of period $ (225) $ (339) $ (94)