Loans and Leases - Schedule of Loans Charge-offs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 176	$ 41	$ 238	$ 74
Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			19
2022			56
2021			34
2020			51
2019			22
2018 & Prior			25
Revolving			31
Revolving Converted to Term Loans			0
Total			238
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	69	36	124	64
Commercial | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			3
2022			36
2021			19
2020			6
2019			21
2018 & Prior			23
Revolving			16
Revolving Converted to Term Loans			0
Total			124
Commercial | Non-owner occupied commercial mortgage | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			17
2018 & Prior			12
Revolving			0
Revolving Converted to Term Loans			0
Total			29
Commercial | Commercial and industrial | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			3
2022			31
2021			16
2020			5
2019			3
2018 & Prior			10
Revolving			16
Revolving Converted to Term Loans			0
Total			84
Commercial | Leases | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			0
2022			5
2021			3
2020			1
2019			1
2018 & Prior			1
Revolving			0
Revolving Converted to Term Loans			0
Total			11
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6	5	13	10
Consumer | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			3
2022			2
2021			0
2020			0
2019			0
2018 & Prior			2
Revolving			6
Revolving Converted to Term Loans			0
Total			13
Consumer | Residential mortgage | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			0
2018 & Prior			2
Revolving			0
Revolving Converted to Term Loans			0
Total			2
Consumer | Consumer auto | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			0
2022			1
2021			0
2020			0
2019			0
2018 & Prior			0
Revolving			0
Revolving Converted to Term Loans			0
Total			1
Consumer | Consumer other | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			3
2022			1
2021			0
2020			0
2019			0
2018 & Prior			0
Revolving			6
Revolving Converted to Term Loans			0
Total			10
SVB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 101	$ 0	101	$ 0
SVB | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			13
2022			18
2021			15
2020			45
2019			1
2018 & Prior			0
Revolving			9
Revolving Converted to Term Loans			0
Total			101
SVB | Investor dependent - early stage | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			12
2022			13
2021			5
2020			0
2019			0
2018 & Prior			0
Revolving			0
Revolving Converted to Term Loans			0
Total			30
SVB | Investor dependent - growth stage | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			1
2022			5
2021			10
2020			3
2019			1
2018 & Prior			0
Revolving			4
Revolving Converted to Term Loans			0
Total			24
SVB | Innovation C&I and cash flow dependent | Principal Forgiveness
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023			0
2022			0
2021			0
2020			42
2019			0
2018 & Prior			0
Revolving			5
Revolving Converted to Term Loans			0
Total			$ 47