Fair Value of Financial Instruments - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Millions		12 Months Ended
Jul. 01, 2021	Dec. 31, 2021	Dec. 31, 2022
Carrying value and estimated fair value of financial instruments
Other real estate, fair value		$ 72.3	$ 82.9
Lima One
Carrying value and estimated fair value of financial instruments
Impairment and other net (loss)/gain on securities and other portfolio investments	$ 38.9	$ 38.9

The revenues and gains recognized recorded for each transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(3)
-URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Name:	us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration