RESTRUCTURING INITIATIVES - Charges Reportable by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Avon Integration
Restructuring Cost and Reserve [Line Items]
Charges incurred	$ 7.3	$ 1.5
Charges incurred to-date	8.8
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	8.8
Avon Integration | Avon International
Restructuring Cost and Reserve [Line Items]
Charges incurred	4.5	1.5
Charges incurred to-date	6.0
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	6.0
Avon Integration | Avon Latin America
Restructuring Cost and Reserve [Line Items]
Charges incurred	2.8	0.0
Charges incurred to-date	2.8
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	2.8
Open Up & Grow
Restructuring Cost and Reserve [Line Items]
Charges incurred	(0.5)	(0.4)	$ 3.6	$ 71.6	$ 117.1
Charges incurred to-date	191.4
Estimated charges to be incurred on approved initiatives	2.5
Total expected charges on approved initiatives	193.9
Open Up & Grow | Avon International
Restructuring Cost and Reserve [Line Items]
Charges incurred	(0.2)	(0.3)	3.7	34.7	52.8
Charges incurred to-date	90.7
Estimated charges to be incurred on approved initiatives	2.5
Total expected charges on approved initiatives	93.2
Open Up & Grow | Avon Latin America
Restructuring Cost and Reserve [Line Items]
Charges incurred	(0.3)	(0.1)	(0.1)	36.9	64.3
Charges incurred to-date	100.7
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	100.7
Transformation Plan
Restructuring Cost and Reserve [Line Items]
Charges incurred	(1.5)	(0.2)	(2.8)	(0.4)	23.7	$ 54.8	$ 74.4	$ 21.4
Charges incurred to-date	169.4
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	169.4
Transformation Plan | Avon International
Restructuring Cost and Reserve [Line Items]
Charges incurred	(1.6)	(0.2)	(2.9)	(1.0)	19.0	49.8	56.8	21.4
Charges incurred to-date	141.3
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	141.3
Transformation Plan | Avon Latin America
Restructuring Cost and Reserve [Line Items]
Charges incurred	0.1	$ 0.0	$ 0.1	$ 0.6	$ 4.7	$ 5.0	$ 17.6	$ 0.0
Charges incurred to-date	28.1
Estimated charges to be incurred on approved initiatives	0.0
Total expected charges on approved initiatives	$ 28.1