Restructuring and Related Charges (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net of reversals and impairment	$ 9.2	$ 0.5	$ 11.9	$ 1.0
2023 Plan
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges	10.0		10.0
2023 Plan | Move Cost
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 0.2		0.2
2023 Plan | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring project completion, Duration	12 months
2023 Plan | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring project completion, Duration	9 months
Q2 2024 Plan
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 8.8
Expected restructuring charges	4.5		4.5
Restructuring liabilities	6.2		6.2
Q1 2024 Plan
Restructuring Cost And Reserve [Line Items]
Restructuring charges, net of reversals and impairment	$ 0.2		$ 2.9