Discontinued Operations and Disposal Groups (Details) - USD ($) $ in Millions	Sep. 30, 2024	May 06, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and due from banks		$ 93	$ 72
Interest-bearing deposits with banks		1,952	342
Premises and equipment		58	72
Goodwill		3,743	3,745
CDI and other intangible assets		1,227	1,251
Other assets		2,873	2,173
Assets of discontinued operations	$ 0	9,946	7,655
Other liabilities		4,090	3,539
Liabilities of discontinued operations	$ 0	$ 4,090	$ 3,539