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v3.25.1

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
Level 3 [Member] | Residential Mortgage |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Assets, Fair Value Disclosure | $ 979 | $ 1,007
Level 3 [Member] | Commercial Real Estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Assets, Fair Value Disclosure | $ 94 | $ 97
Recurring Fair Value Measurements | Minimum [Member] | Discounted Cash Flow [Member] | Residential Mortgage |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.046 | 0.046
Option-Adjusted Spread | 5.10% | 4.80%
Recurring Fair Value Measurements | Minimum [Member] | Discounted Cash Flow [Member] | Commercial Real Estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.053 | 0.054
Measurement Input, Discount Rate | 8.00% | 7.00%
Recurring Fair Value Measurements | Maximum [Member] | Discounted Cash Flow [Member] | Residential Mortgage |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.172 | 0.231
Option-Adjusted Spread | 8.50% | 7.70%
Recurring Fair Value Measurements | Maximum [Member] | Discounted Cash Flow [Member] | Commercial Real Estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.074 | 0.106
Measurement Input, Discount Rate | 10.00% | 8.00%
Recurring Fair Value Measurements | Weighted Average [Member] | Discounted Cash Flow [Member] | Residential Mortgage |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.077 | 0.080
Option-Adjusted Spread | 5.30% | 5.10%
Recurring Fair Value Measurements | Weighted Average [Member] | Discounted Cash Flow [Member] | Commercial Real Estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.071 | 0.077
Measurement Input, Discount Rate | 8.20% | 7.10%

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