FAIR VALUE MEASUREMENTS - FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Carrying amount
Financial instruments
Long-term debt	$ 2,553.3	$ 1,959.3
Fair value
Financial instruments
Long-term debt	$ 2,059.3	$ 1,626.0

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details