RELATED PARTY TRANSACTIONS - Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Related Party Transaction [Line Items]
Expenses	$ 12.4	$ 11.6	$ 28.1	$ 27.9
Dofcon Navegacao
Related Party Transaction [Line Items]
Expenses	6.4	3.8	13.0	11.8
Magma Global Limited | Equity Method Investee
Related Party Transaction [Line Items]
Expenses	2.6	0.9	4.1	1.6
Serimax Holdings SAS | Equity Method Investee
Related Party Transaction [Line Items]
Expenses	0.1	0.3	0.1	0.5
Altus Intervention | Other Affiliates
Related Party Transaction [Line Items]
Expenses	1.6	0.8	2.8	1.1
Others | Other Affiliates
Related Party Transaction [Line Items]
Expenses	$ 1.7	$ 5.8	$ 8.1	$ 12.9