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Loans and Leases - Financial Effect of TDRs (Details) - Mortgage Loans: - Commercial real estate $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) loan	Sep. 30, 2022 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0	2
Pre- Modification Recorded Investment	$ 0	$ 22
Post- Modification Recorded Investment	$ 0	$ 19
Interest rate reduction, weighted-average contractual interest rate, prior to modification	0.00%	6.00%
Interest rate reduction, weighted-average contractual interest rate, after modification	0.00%	4.02%
Charge- off Amount	$ 0	$ 3
Capitalized Interest	$ 0	$ 0

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

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Reflects the amount of the write-down related to a troubled debt restructuring.

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