Long-Term Debt - Notes Associated with Consolidated VIEs (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Debt Instrument
Long-term debt	[1]	$ 16,380	$ 13,714
2024		3,826
2026		1,352
2028		2,634
Thereafter		4,239
Subsidiaries
Debt Instrument
Long-term debt		6,272
2024		1,576
2026		1,352
2028		587
Thereafter		386
Variable Interest Entity, Primary Beneficiary | Subsidiaries | Automobile And Solar Loans | Fixed
Debt Instrument
Long-term debt		1,300
2024		70
2026		587
2028		550
Thereafter		$ 133

[1] Includes $55 and $17 of other short-term investments, $1,573 and $185 of portfolio loans and leases, $(28) and $(2) of ALLL, $10 and $2 of other assets, $14 and $9 of other liabilities and $1,409 and $118 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2023 and 2022, respectively. For further information, refer to Note 12.