Discontinued Operations - Summary of Operating Results of the Discontinued Insurance Agency Business (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest on other earning assets		$ 7		$ 31
Total interest income		7		31
Insurance income		427		1,319
Other income		4		9
Total noninterest income		431		1,328
Personnel expense		251		885
Professional fees and outside processing		37		85
Software expense		8		25
Net occupancy expense		5		20
Amortization of intangibles		0		21
Equipment expense		2		11
Marketing and customer development		5		15
Restructuring charges		63		82
Other expense		26		84
Total noninterest expense		397		1,228
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		6,903		6,903
Income before income taxes from discontinued operations		6,944		7,034
Provision for income taxes		2,116		2,139
Net income from discontinued operations	$ 0	4,828	$ 0	4,895
Noncontrolling interests from discontinued operations	$ 0	19	$ 0	22
Net income from discontinued operations attributable to controlling interest		$ 4,809		$ 4,873