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Fair Value Measures - Quantitative Information about Recurring Level 3 Fair Value Financial Instruments (Details) $ in Millions | Dec. 31, 2023 USD ($) constant_default_rate_per_loan | Dec. 31, 2022 USD ($)
--- | --- | ---
Assets: |  |
Total debt securities available for sale | $ | $ 9,145 | $ 9,060
Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | $ | 180 | 191
Recurring |  |
Assets: |  |
Mortgage servicing rights | $ | 1,111 | 1,033
Recurring | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | $ | 180 | 191
Recurring | Rate lock commitments (fallout-adjusted) |  |
Liabilities: |  |
Rate lock commitments (net) | $ | $ 3 | 10
Weighted average life |  |
Assets: |  |
Mortgage servicing rights, measurement input | 6.83 |
Significant Unobservable Inputs (Level 3) | Recurring |  |
Assets: |  |
Mortgage servicing rights | $ | $ 1,111 | 1,033
Significant Unobservable Inputs (Level 3) | Recurring | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | $ | 32 | 0
Significant Unobservable Inputs (Level 3) | Recurring | Rate lock commitments (fallout-adjusted) |  |
Liabilities: |  |
Rate lock commitments (net) | $ | $ 3 | $ 10
Significant Unobservable Inputs (Level 3) | Option adjusted spread | Minimum | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 0.050 |
Significant Unobservable Inputs (Level 3) | Option adjusted spread | Maximum | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 0.217 |
Significant Unobservable Inputs (Level 3) | Option adjusted spread | Weighted average | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 0.054 |
Significant Unobservable Inputs (Level 3) | Constant prepayment rate | Minimum | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 0.000 |
Significant Unobservable Inputs (Level 3) | Constant prepayment rate | Maximum | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 0.100 |
Significant Unobservable Inputs (Level 3) | Constant prepayment rate | Weighted average | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 0.079 |
Significant Unobservable Inputs (Level 3) | Weighted average cost to service per loan | Minimum | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 65.0 |
Significant Unobservable Inputs (Level 3) | Weighted average cost to service per loan | Maximum | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 90.0 |
Significant Unobservable Inputs (Level 3) | Weighted average cost to service per loan | Weighted average | Recurring |  |
Assets: |  |
Mortgage servicing rights, measurement input | 69.0 |
Significant Unobservable Inputs (Level 3) | Origination pull-through rate | Recurring | Rate lock commitments (fallout-adjusted) |  |
Liabilities: |  |
Rate lock commitments (net), measurement input | 0.6430 |
Significant Unobservable Inputs (Level 3) | Constant default rates | Minimum | Recurring | Private Label CMOs |  |
Assets: |  |
Private Label CMOs, measurement input | 0.0010 |
Significant Unobservable Inputs (Level 3) | Constant default rates | Maximum | Recurring | Private Label CMOs |  |
Assets: |  |
Private Label CMOs, measurement input | 0.0030 |
Significant Unobservable Inputs (Level 3) | Weighted average life | Minimum | Recurring | Private Label CMOs |  |
Assets: |  |
Private Label CMOs, measurement input | 0.082 |
Significant Unobservable Inputs (Level 3) | Weighted average life | Maximum | Recurring | Private Label CMOs |  |
Assets: |  |
Private Label CMOs, measurement input | 0.118 |
Significant Unobservable Inputs (Level 3) | Rate lock commitments (fallout-adjusted) | Recurring | Rate lock commitments (fallout-adjusted) |  |
Liabilities: |  |
Rate lock commitments (net) | $ | $ 9 |

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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