XML 63 R50.htm IDEA: XBRL DOCUMENT v3.20.4
Note 4 - Accounts Receivable - Accounts Receivable, Net (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Receivables $ 450.1 $ 453.3
Less allowance for doubtful accounts (17.7) (11.7)
Accounts receivable, net 432.4 441.6
Billed Revenues [Member]    
Receivables 380.5 372.7
Unbilled Revenues [Member]    
Receivables $ 69.6 $ 80.6