Trade and Other Receivables (Allowance for Expected Credit Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at December 31, 2022	$ 3.3
Current period provision	5.9	$ 0.0	$ 0.0
Write-offs charged against the allowance	(2.8)
Balance at December 31, 2023	$ 6.4	$ 3.3