Loans and Leases - Composition of Loan and Lease Portfolio (Parenthetical) (Details) - USD ($) $ in Millions		Jun. 30, 2022		Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered Loans	[1]	$ 48,485		$ 45,681
Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable		197		199
Lease Financing, Unearned Income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned income		85		95
Non-Covered Loans		1,756		1,770
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered Loans	[3]	4,671	[2]	4,006	[4]
Commercial and Industrial | Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered Loans		2,915		2,236
Commercial and Industrial | Specialty Finance Loans | Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered Loans		4,100		3,500
Commercial and Industrial | Other Commercial and Industrial Loans | Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-Covered Loans		$ 548		$ 527

[1] Excludes accrued interest receivable of $197 million and $199 million at June 30, 2022 and December 31, 2021, respectively, which is included in other assets in the Consolidated Statements of Condition.

[2] Includes lease financing receivables, all of which were classified as Pass.

[3] Includes specialty finance loans and leases of $4.1 billion and $3.5 billion, respectively, at June 30, 2022 and December 31, 2021, and other C&I loans of $548 million and $527 million, respectively, at June 30, 2022 and December 31, 2021.

[4] Includes lease financing receivables, all of which were classified as Pass.