XML 118 R88.htm IDEA: XBRL DOCUMENT v3.21.1
LONG-TERM DEBT AND CREDIT FACILITIES - Other (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Long-term debt    
Long-term debt and credit facilities $ 1,424.2 $ 1,837.4
Operations in Brazil, Mauritania, Ghana and Chile    
Long-term debt    
Surety bonds $ 175.6 184.7
Fees incured (as a percentage) 0.74%  
Letter of Credit guarantee facility    
Long-term debt    
Maximum borrowing capacity $ 300.0  
Borrowings, maturity June 30, 2022  
Long-term debt and credit facilities $ 228.9 227.8
Fees incured (as a percentage) 0.75%  
Surety bonds    
Long-term debt    
Surety bonds $ 290.1 $ 276.5
Fees incured (as a percentage) 0.50%