Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable [Abstract]
Trade receivables	$ 455.0	$ 535.4
Non-income tax receivables	63.4	74.6
Other receivables	57.7	44.2
Less: allowance for doubtful accounts	(5.3)	(6.1)
Total	570.8	648.1
Recognized bad debt expense	$ (0.7)	$ 0.6	$ 1.5