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Consolidated Statements Of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Other comprehensive income/(loss), tax expense	$ 3.0	$ 16.3	$ 17.1	$ 12.2
Reclassifications to earnings of realized gains/(losses) on available-for-sale securities			$ 0.0	$ 0.0

X

- Definition

Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-SubTopic 10
-Topic 220
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of tax expense (benefit) allocated to other comprehensive income (loss).

+ References

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