Investments - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 78.0	$ 70.1
Other comprehensive (loss) income	71.7	(74.1)	$ 32.8
Available for sale investments	78.4	69.6
Allowance for credit losses related to our available-for-sale debt securities	0.0
Available-for-sale investments, accumulated unrealized losses	0.4	0.6
Available-for-sale investments, fair value of securities with unrealized losses	20.5	40.5
Unrealized Gain (Loss) on Available-for-Sale Securities
Debt Securities, Available-for-sale [Line Items]
Other comprehensive (loss) income	0.7	$ (0.1)	$ 0.6
State and Local Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 78.0