Retirement Benefits (Details 6) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 12.5	$ 25.0
Current liabilities	(5.7)	(5.7)
Noncurrent liabilities	(225.6)	(415.4)
Total amount recognized	(218.8)	(396.1)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0.0	0.0
Current liabilities	(27.8)	(29.2)
Noncurrent liabilities	(184.9)	(258.1)
Total amount recognized	$ (212.7)	$ (287.3)