LEASES - Maturities of Lease Liabilities (Details) $ in Millions	Jun. 30, 2019 USD ($)
Operating Leases
July 2019 through December 2019	$ 18.7
2020	33.0
2021	29.5
2022	23.1
2023	18.9
Thereafter	60.3
Total undiscounted cash flows	183.5
Short-term lease liability	17.6
Long-term lease liability	94.0
Total lease liability	111.6
Difference between undiscounted cash flows and discounted cash flows	71.9
Finance Leases
July 2019 through December 2019	0.5
2020	0.6
2021	0.5
2022	0.3
2023	0.0
Thereafter	0.0
Total undiscounted cash flows	1.9
Short-term lease liability	0.9
Long-term lease liability	0.7
Total lease liability	1.6
Difference between undiscounted cash flows and discounted cash flows	$ 0.3