v3.20.4
REVENUE RECOGNITION - Receivables and deferred revenue (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current assets:      
Receivables related to contracts with customers $ 23.1 $ 160.3  
Miscellaneous receivables 67.9 93.9  
Receivables, net 91.0 254.2  
Current liabilities:      
Deferred revenue related to contracts with customers 400.6 447.1 $ 412.8
Miscellaneous deferred income 4.8 2.1  
Deferred revenues and income $ 405.4 $ 449.2