OTHER CURRENT ASSETS & OTHER CURRENT LIABILITIES - Other current assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Other Current Assets & Other Current Liabilities [Abstract]
Value - added tax receivables	$ 185.6	$ 222.4
Withholding tax and other receivables	137.8	176.7
Prepaid expenses	61.9	50.7
Assets held for sale	18.6	5.0
Held-to-maturity investments	15.1	8.8
Current financial assets at amortized cost	12.4	21.9
Other	23.6	26.8
Total other current assets	$ 455.0	$ 512.3