Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 02, 2022	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance			$ 178	$ 225	$ 225
Initial PCD ACL		$ 272			2
Day 2 provision for loans and leases		454
Provision for credit losses - loans and leases			97
Total provision for credit losses- loans and leases			551	(37)	58
Charge-offs			(146)	(36)	(45)
Recoveries			67	26	23
Allowance for credit losses, ending balance		922	922	178	225
Allowance for credit loss prior to acquisition date	$ 243
Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance					(38)
Balance after adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance					187
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance			80	92	150
Initial PCD ACL		258			1
Day 2 provision for loans and leases		432
Provision for credit losses - loans and leases			101
Total provision for credit losses- loans and leases			533	(7)	34
Charge-offs			(126)	(18)	(20)
Recoveries			44	13	11
Allowance for credit losses, ending balance		789	789	80	92
Commercial | Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance					(84)
Commercial | Balance after adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance					66
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance			98	133	75
Initial PCD ACL		14			1
Day 2 provision for loans and leases		22
(Benefit) for credit losses - loans and leases			(4)
Total provision for credit losses- loans and leases			18	(30)	24
Charge-offs			(20)	(18)	(25)
Recoveries			23	13	12
Allowance for credit losses, ending balance		$ 133	$ 133	$ 98	133
Consumer | Adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance					46
Consumer | Balance after adoption of ASC 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance					$ 121