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UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 10.5	$ 15.5	$ 40.6	$ (24.7)
Other comprehensive income (loss), net of income taxes:
Change in unfunded pension plan obligation liability	1.3	0.0	1.4	0.0
Other	0.0	0.0	0.0	0.1
Comprehensive income (loss)	$ 11.8	$ 15.5	$ 42.0	$ (24.6)

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