LEASES - Maturities of Lease Liabilities (Details) $ in Millions	Sep. 30, 2019 USD ($)
Operating Leases
October 2019 through December 2019	$ 9.3
2020	33.1
2021	29.6
2022	23.1
2023	18.9
Thereafter	60.3
Total undiscounted cash flows	174.3
Short-term lease liability	13.9
Long-term lease liability	92.3
Total lease liability	106.2
Difference between undiscounted cash flows and discounted cash flows	68.1
Finance Leases
October 2019 through December 2019	0.2
2020	0.6
2021	0.5
2022	0.3
2023	0.0
Thereafter	0.0
Total undiscounted cash flows	1.6
Short-term lease liability	0.7
Long-term lease liability	0.5
Total lease liability	1.2
Difference between undiscounted cash flows and discounted cash flows	$ 0.4