v3.26.1
LEASES: (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
LEASES:    
Lessee, operating lease, option to extend false  
Lessee, operating lease, option to terminate false  
The weighted average remaining lease term 6 years  
The weighted average discount rate 5.02%  
Total lease expense $ 57.5 $ 57.7
Maturities of lease liabilities    
2026 58.6  
2027 117.2  
2028 117.2  
2029 115.6  
2030 108.0  
After 2030 216.0  
Total lease payments 732.5  
Less: interest on lease liabilities (102.4)  
Present value of lease payments 630.1  
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfRevenue    
LEASES:    
Total lease expense 57.4 57.6
Location, Statement of Income, Balance [Axis]: us-gaap:ExplorationExpense    
LEASES:    
Total lease expense   $ 0.1
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense    
LEASES:    
Total lease expense $ 0.1  
Minimum    
LEASES:    
Remaining lease terms 1 year  
Maximum    
LEASES:    
Remaining lease terms 7 years