v3.22.1
REVENUE RECOGNITION - Receivables and deferred revenue (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Current assets:    
Receivables related to contracts with customers $ 33.7 $ 85.4
Miscellaneous receivables 72.1 83.1
Receivables, net 105.8 168.5
Current liabilities:    
Deferred revenue related to contracts with customers 376.7 405.1
Miscellaneous deferred income 3.1 3.5
Deferred revenue and income $ 379.8 $ 408.6