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INVESTMENTS - Amortized Cost and Fair Value of TCA's Investment (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Amortized Cost
Due in 1 year or less	$ 2.8
Due in 1-5 years	123.5
Due in 5-10 years	48.3
Due after 10 years	2.0
Total by maturity	176.6
Fair Value
Due in 1 year or less	2.8
Due in 1-5 years	125.3
Due in 5-10 years	49.2
Due after 10 years	2.1
Total by maturity	179.4
Amortized Cost	384.3	$ 349.8
Fair Value	388.3	348.6
Mortgage and other asset-backed securities
Fair Value
Amortized Cost	207.6	170.1
Fair Value	$ 208.9	$ 169.1

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