Derivative Financial Instruments - Amounts Related to Fair Value Hedges (Details) - Fair Value Hedges - Interest Rate Contracts - Net interest income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Notional, Fair Value Assets and Liabilities[Line Items]
Net income (expense) recognized		$ 266	$ 267	$ 263
Available-for-sale Securities
Derivative Instruments, Notional, Fair Value Assets and Liabilities[Line Items]
Amounts related to interest settlements		102	(48)	(3)
Recognized on derivatives		598	571	29
Recognized on hedged items		(541)	(568)	(41)
Net income (expense) recognized	[1]	159	(45)	(15)
Loans and leases
Derivative Instruments, Notional, Fair Value Assets and Liabilities[Line Items]
Amounts related to interest settlements		0	0	(1)
Recognized on derivatives		0	0	(3)
Recognized on hedged items		(3)	(5)	1
Net income (expense) recognized		(3)	(5)	(3)
Long-term debt
Derivative Instruments, Notional, Fair Value Assets and Liabilities[Line Items]
Amounts related to interest settlements		(64)	18	182
Recognized on derivatives		(840)	(136)	831
Recognized on hedged items		1,014	435	(732)
Net income (expense) recognized		$ 110	$ 317	$ 281

[1] Includes $53 million of income recognized from securities with terminated hedges that were reclassified to HTM. The income recognized was offset by the amortization of the fair value mark. See additional details over amounts recognized in “Note 13. AOCI.”