PENSION AND POST-RETIREMENT BENEFITS - Fair Value of Pension Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 462.4	$ 432.4
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	380.6	358.3
International Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 81.8	$ 74.1