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Basis of Preparation and Significant Accounting Policies - Recently Adopted Accounting Standards (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Disclosure of initial application of standards or interpretations [line items]      
Land rights $ 104.1 $ 111.5  
Lease liabilities   122.4  
Current accrued expenses and other current liabilities (370.9)   $ (320.4)
Finance lease obligation     $ 107.4
Discounted using our incremental borrowing rate at January 1, 2019   (13.2)  
Recognition exemption for short-term and low-value leases   (1.9)  
Extension options reasonably certain to be exercised   19.7  
Lease obligations recognized at January 1, 2019 under IFRS 16   112.0  
Lease obligations previously classified as finance leases under IAS 17   10.4  
IFRS 16      
Disclosure of initial application of standards or interpretations [line items]      
Land rights   111.5  
Lease liabilities $ 111.2 112.0  
Current accrued expenses and other current liabilities   $ 0.5  
Weighted average incremental borrowing rate used to determine lease obligation (percentage)   4.70%