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Mortgage Banking Activity - Residential Mortgage Loans (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward] |  |
Balance at beginning of period | $ 1,022 |
Acquired | 0 | $ 320
Originations and purchases | 1,420 | 2,499
Sales, net of gains | (1,489) | (2,405)
Mortgage loans transferred from (to) held for investment | 30 | (9)
Balance at end of period | 977 |
Mortgage loans |  |
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward] |  |
Balance at beginning of period | 409 | 4
Balance at end of period | $ 370 | $ 409

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- Definition Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Acquired + References No definition available. + Details
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- Definition Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Mortgage Loans Transferred to Held-For-Investment + References No definition available. + Details
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- Definition Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Originations and Purchases + References No definition available. + Details
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- Definition Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124265262&loc=d3e48678-111004 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount, after allowance for bad debt, of deductions to loan receivables held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + Details
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- Details
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