Other Current Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other Current Assets and Other Current Liabilities [Abstract]
Value-added tax receivables	$ 438.0	$ 395.2
Sundry receivables	112.0	69.6
Prepaid expenses	110.1	66.8
Other taxes receivable	89.7	100.7
Held-to-maturity Investments	49.7	49.7
Current financial assets at amortized cost	41.1	42.0
Assets held-for-sale	11.2	25.8
Other	116.8	113.9
Total other current assets	$ 968.6	$ 863.7