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Other Income, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest and investment income	$ (14.7)	$ (16.6)	$ (50.9)	$ (50.6)
Net realized (gain) loss on investments	(0.9)	0.1	(1.3)	0.3
Other Nonoperating (Income)	(0.6)	(1.7)	(1.2)	(2.3)
Other (income) expense, net	$ (16.2)	$ (18.2)	$ (53.4)	$ (52.6)

X

- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities.

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- Definition

Amount of income related to nonoperating activities, classified as other.

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Amount of realized gain (loss) on investment.

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