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Loans and the Allowance for Credit Losses (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Federal Home Loan Bank (FHLB) |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Pledged financial instruments, loans receivable, FHLB | $ 15,200 |  |
Federal Reserve Bank [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Pledged Assets, Loans Receivable, FRB | 15,100 |  |
Indirect-other consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Purchased loans | 563 | $ 532 |
Commercial And Industrial [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Sales-type and direct financing lease receivable | 1,300 |  |
Sales-Type and Direct Financing | 24 |  |
Commercial Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing Receivable, Nonaccrual, No Allowance | $ 156 |  | $ 127

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- Definition Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 + Details
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