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Business Description And Significant Accounting Policies: Accounts Receivable (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Billed Accounts Receivable $ 201.5 $ 198.5    
Unbilled Revenue 151.8 154.0    
Less Allowance for Credit Losses (2.1) (2.2) $ (3.0) $ (2.1)
Accounts Receivable, net $ 351.2 $ 350.3