Supplemental Consolidated Cash and Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Cash	$ 14.2		$ 29.0
Restricted cash	0.4		0.7
Total cash and restricted cash reported in the Consolidated Balance Sheets	14.6	$ 23.1	$ 29.7	$ 42.8
Interest	16.8	13.1
Income taxes	$ 13.3	$ 10.0