Operating Segment and Geographic Information (Schedule of Long-lived Assets By Geographic Region) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Long-lived assets	$ 868.9	$ 857.5
United States
Segment Reporting Information [Line Items]
Long-lived assets	384.1	401.2
England
Segment Reporting Information [Line Items]
Long-lived assets	166.7	161.9
Germany
Segment Reporting Information [Line Items]
Long-lived assets	148.9	139.7
Other
Segment Reporting Information [Line Items]
Long-lived assets	$ 169.2	$ 154.7