RESTRUCTURING INITIATIVES RESTRUCTURING INITIATIVES - Summary (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	$ 43.2	$ 10.9
Open Up Avon
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	45.1	0.0
Transformation Plan
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	(2.0)	10.9
Other Restructuring Initiatives
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	0.1	0.0
Inventory write-off | Open Up Avon
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives			$ 88.0
Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	4.3	0.6
Cost of Goods Sold | Manufacturing asset write-offs
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	3.8	0.0
Cost of Goods Sold | Inventory write-off
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	0.5	0.6
Selling, General and Administrative Expense
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	49.2	10.3
Selling, General and Administrative Expense | Net charges for employee-related costs, including severance benefits
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	35.3	8.3
Selling, General and Administrative Expense | Implementation costs, primarily related to professional service fees
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	8.7	1.1
Selling, General and Administrative Expense | Dual running costs
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	1.8	0.0
Selling, General and Administrative Expense | Contract termination and other net benefits
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	3.3	0.2
Selling, General and Administrative Expense | Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	0.1	0.7
Operating Profit
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	53.5	10.9
Other Expenses
Restructuring Cost and Reserve [Line Items]
CTI restructuring initiatives	$ (10.3)	$ 0.0