Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - 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 (loss) income	$ (125.2)	$ 26.4	$ (131.5)	$ 22.7
Other comprehensive (loss) income net of tax:
Unrealized gain (loss) on derivative instruments, net of tax benefit (expense) of zero and $(0.2) and $(0.2) and $0.1, respectively	0.1	0.6	0.6	(0.3)
Foreign currency translation adjustments, net of tax (expense) benefit of $(0.5) and $0.1 and $(0.5) and $0.2, respectively	(15.3)	(1.7)	(36.5)	7.2
Recognition of deferred pension and other post-retirement items, net of tax (expense) benefit of $(1.4) and $0.2 and $(2.1) and $0.6, respectively	3.9	(0.8)	6.3	(2.3)
Other comprehensive (loss) income net of tax:	(11.3)	(1.9)	(29.6)	4.6
Comprehensive (loss) income	$ (136.5)	$ 24.5	$ (161.1)	$ 27.3