Benefit Plans - Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Noncurrent liabilities	$ (29.6)	$ (28.2)
Pension benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Noncurrent assets	2.7	0.3
Current liabilities	(1.4)	(1.5)
Noncurrent liabilities	(26.5)	(24.9)
Total liabilities	(25.2)	(26.1)
Other retirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(0.6)	(0.6)
Noncurrent liabilities	(3.1)	(3.3)
Total liabilities	$ (3.7)	$ (3.9)