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Mortgage Servicing Rights - Summary of Income and Fees (Details) - Residential First Mortgage Loans $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($)
Servicing Assets at Fair Value [Line Items] |  |
Decreases in MSR fair value due to pay-offs, pay-downs, run-off, model changes, and other | $ (8) | [1]
Servicing Asset, Fair Value, Change in Fair Value, Valuation Input, Statement of Income or Comprehensive Income [Extensible Enumeration] | Net Return On Mortgage Servicing Rights |
Changes in fair value due to interest rate risk | $ 10 | [1],[2]
Net Return (loss) on Mortgage Servicing Rights |  |
Servicing Assets at Fair Value [Line Items] |  |
Servicing fees, ancillary income and late fees | 20 | [3]
Changes in fair value due to interest rate risk | 10 |
Loss on MSR derivatives | (16) | [4]
Total return (loss) and income on mortgage loans | 6 |
Loan Administration Income on Mortgage Loans Subserviced |  |
Servicing Assets at Fair Value [Line Items] |  |
Servicing fees, ancillary income and late fees | 11 | [5]
Charges on subserviced custodial balances | (8) | [6]
Total return (loss) and income on mortgage loans | $ 3 |
[1] | Changes in fair value are included within net return on mortgage servicing rights on the Consolidated Statements of Income and Comprehensive Income.
[2] | Represents estimated MSR value change resulting primarily from market-driven changes which we manage through the use of derivatives.
[3] | Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on a cash basis.
[4] | Changes in the derivatives utilized as economic hedges to offset changes in fair value of the MSRs.
[5] | Servicing fees are recorded on an accrual basis. Ancillary income and late fees are recorded on a cash basis.
[6] | Charges on subserviced custodial balances represent interest due to MSR owner.

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- Definition Servicing asset at fair value income amount. + References No definition available. + Details
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- Definition Subservicing asset at fair value, charges on subserviced escrow balances. + References No definition available. + Details
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- Definition Amount of contractually specified servicing fee, late fee, and ancillary fee recognized as income for servicing asset and servicing liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122596-111746 + Details
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- Definition Indicates line item in statement of income or comprehensive income that includes increase (decrease) in fair value from change in input used to calculate fair value of contract to service financial asset under which benefit of servicing is expected to more than adequately compensate servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 + Details
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- Definition Amount of increase (decrease) in fair value from changes in the inputs used to calculate the fair value of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(4)(i) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 + Details
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- Definition The increase (decrease) in the fair value of servicing assets that are subsequently measured at fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 + Details
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