Fair Value Measurements - Fair Value Option on Consolidated VIEs (Details) - Other loans of consolidated VIEs - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Fair Value Option, Quantitative Disclosures
Fair value	$ 103.3
Aggregate contractual principal	103.3
Change in fair value pre-tax loss	(0.1)	$ (0.1)
Interest income	$ 1.3	$ 1.3

The contractual principal amounts of assets for which the fair value option was elected.

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- Definition

The fair value of assets for which the fair value option was elected.

+ References

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

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