Discontinued Operations and Assets and Liabilities Held for Sale (Assets and Liabilities Held For Sale) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current held for sale assets
Held for sale assets	$ 1.8	$ 0.0
Current held for sale liabilities
Held for sale liabilities	79.9	31.7
Held-for-sale
Current held for sale assets
Property, Plant & Equipment (net)	0.0	2.8
Held for sale assets	0.0	2.8
Current held for sale liabilities
Accounts payable	0.0	0.0
Other liabilities	0.0	0.0
Held for sale liabilities	$ 0.0	$ 0.0