LEASES - Maturities of Operating Lease Liabilities (Details) $ in Millions	Sep. 30, 2019 USD ($)
Leases [Abstract]
2019	$ 8.5
2020	29.7
2021	26.2
2022	23.4
2023	20.5
Thereafter	41.1
Total undiscounted operating lease payments	149.4
Less: Imputed interest	(22.3)
Total operating lease liabilities	127.1
Less: Current maturities of operating lease liabilities	(24.9)
Non-current operating leases	$ 102.2