Restructuring (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		18 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.7	$ 0.0
2024 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.7
Additional restructuring costs	0.0		$ 0.0
2024 Restructuring | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.7
2022 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0		6.7
Additional restructuring costs	$ 0.0		0.0
2022 Restructuring | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5.8
2022 Restructuring | Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 0.9