Other Current Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Current Assets and Other Current Liabilities [Abstract]
Value-added tax receivables	$ 437.7	$ 395.2
Sundry receivables	160.8	69.6
Prepaid expenses	130.5	66.8
Other taxes receivable	73.4	100.7
Held-to-maturity Investments	71.9	49.7
Current financial assets at amortized cost	39.2	42.0
Assets held-for-sale	56.8	25.8
Other	67.6	113.9
Total other current assets	$ 1,037.9	$ 863.7