Business Combinations - Schedule of Business Acquisitions - SVBB Acquisition (Details) - USD ($) $ in Millions		3 Months Ended
	Mar. 27, 2023	Mar. 31, 2023	Mar. 31, 2022
Liabilities
Gain on acquisition		$ 9,824	$ 431
SVB
Business Acquisition [Line Items]
Purchase Money Note	$ 35,150
Value Appreciation Instrument	500
Purchase price consideration	35,650
Assets
Cash and interest-earning deposits at banks	1,347
Interest-earning deposits at banks	33,932
Investment securities	122
Loans and leases	68,503
Affordable housing tax credit investments	1,134
Premises and equipment, net	286
Intangible assets	230
Other assets	1,332
Total assets acquired	106,600
Liabilities
Deposits	55,959
Borrowings	10
Deferred tax liabilities	3,310	$ 3,310
Other liabilities	1,847
Total liabilities assumed	61,126
Fair value of net assets acquired	45,474
Preliminary gain on acquisition, after income taxes	9,824
Gain on acquisition	13,134
Book value of net assets acquired	51,820
Business combination asset acquired, discount	16,450
Purchase Money Note, fair value discount	$ 220