Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	$ (15.2)	$ (16.3)
Net pension income	0.2	0.4
Loss before income taxes	(25.7)	(15.8)
Income tax expense	(2.4)	(8.8)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss before income taxes	0.9	0.8
Income tax expense	(0.3)	(0.2)
Total reclassifications for the period, net of tax	0.6	0.6
Interest Rate Derivatives Adjustments | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	0.6	0.7
Income tax expense	(0.2)	(0.2)
Total reclassifications for the period, net of tax	0.4	0.5
Defined Benefit Plans Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net pension income	0.3	0.1
Income tax expense	(0.1)	0.0
Total reclassifications for the period, net of tax	$ 0.2	$ 0.1