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Business Segment Reporting - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
MSR valuation adjustments, net | $ 32.7 | $ 48.9 | $ 44.3 | $ 117.9
Interest expense | $ 73.1 | $ 68.3 | $ 140.5 | $ 130.5

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