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Other Current Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Other Current Assets and Other Current Liabilities [Abstract]    
Value-added tax receivables $ 379.6 $ 305.8
Prepaid expenses 88.3 91.3
Other taxes receivables 82.5 85.0
Sundry receivables 76.4 87.0
Available-for-sale Securities, Current 19.7  
Asset held for sale 13.8 9.6
Other 88.5 76.9
Total other current assets $ 748.8 $ 655.6