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Summary of Significant Accounting Policies (Supplemental Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 303	$ 185	$ 408
Income Taxes Paid, Net	336	367	132
Real Estate Owned, Transfer to Real Estate Owned	21	14	31
Transfer of Portfolio Loans and Leases to Held-for-sale	22	240	275
Transfer of Loans Held-for-sale to Portfolio Loans	24	277	1
Properties Transferred To Held For Sale	$ 6	$ 38	$ 33

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Properties Transferred To Held For Sale

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Value of loans held-for-sale transferred to loans held in the entity's portfolio in noncash transactions.

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