Allowance for Credit Losses - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 02, 2022	Mar. 31, 2022	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 178	$ 178		$ 225
Initial PCD ACL			$ 284
Initial Non-PCD Provision			454
Benefit for credit losses - loans and leases		(53)
Total provision (benefit) for credit losses- loans and leases		401		(11)
charege-offs		(33)		(9)
Recoveries		18		6
Other		0		0
Allowance for credit losses, ending balance		848	848	211
Allowance for credit loss prior to acquisition date	243
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	80	80		92
Initial PCD ACL			270
Initial Non-PCD Provision			432
Benefit for credit losses - loans and leases		(23)
Total provision (benefit) for credit losses- loans and leases		409		(3)
charege-offs		(28)		(4)
Recoveries		12		2
Other		0		0
Allowance for credit losses, ending balance		743	743	87
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 98	98		133
Initial PCD ACL			14
Initial Non-PCD Provision			22
Benefit for credit losses - loans and leases		(30)
Total provision (benefit) for credit losses- loans and leases		(8)		(8)
charege-offs		(5)		(5)
Recoveries		6		4
Other		0		0
Allowance for credit losses, ending balance		$ 105	$ 105	$ 124