v3.21.2
REVENUE RECOGNITION - Receivables and deferred revenue (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Current assets:    
Receivables related to contracts with customers $ 31.7 $ 23.1
Miscellaneous receivables 56.8 67.9
Receivables, net 88.5 91.0
Current liabilities:    
Deferred revenue related to contracts with customers 400.0 400.6
Miscellaneous deferred income 2.1 4.8
Deferred revenues and income $ 402.1 $ 405.4