ACCOUNTING POLICIES - Disaggregation of Revenue (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Revenue	$ 1,393.5
Net sales
Disaggregation of Revenue [Line Items]
Revenue	1,309.6
Beauty
Disaggregation of Revenue [Line Items]
Revenue	989.0
Skincare
Disaggregation of Revenue [Line Items]
Revenue	393.8
Fragrance
Disaggregation of Revenue [Line Items]
Revenue	356.2
Color
Disaggregation of Revenue [Line Items]
Revenue	239.0
Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	320.6
Fashion
Disaggregation of Revenue [Line Items]
Revenue	190.5
Home
Disaggregation of Revenue [Line Items]
Revenue	130.1
Other revenue
Disaggregation of Revenue [Line Items]
Revenue	83.9
Representative fees
Disaggregation of Revenue [Line Items]
Revenue	75.9
Other
Disaggregation of Revenue [Line Items]
Revenue	8.0
Reportable segments
Disaggregation of Revenue [Line Items]
Revenue	1,372.5
Reportable segments | Net sales
Disaggregation of Revenue [Line Items]
Revenue	1,296.8
Reportable segments | Beauty
Disaggregation of Revenue [Line Items]
Revenue	978.8
Reportable segments | Skincare
Disaggregation of Revenue [Line Items]
Revenue	389.1
Reportable segments | Fragrance
Disaggregation of Revenue [Line Items]
Revenue	354.0
Reportable segments | Color
Disaggregation of Revenue [Line Items]
Revenue	235.7
Reportable segments | Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	318.0
Reportable segments | Fashion
Disaggregation of Revenue [Line Items]
Revenue	188.6
Reportable segments | Home
Disaggregation of Revenue [Line Items]
Revenue	129.4
Reportable segments | Other revenue
Disaggregation of Revenue [Line Items]
Revenue	75.7
Reportable segments | Representative fees
Disaggregation of Revenue [Line Items]
Revenue	74.5
Reportable segments | Other
Disaggregation of Revenue [Line Items]
Revenue	1.2
Other Operating Segments and Business Activities
Disaggregation of Revenue [Line Items]
Revenue	21.0
Other Operating Segments and Business Activities | Net sales
Disaggregation of Revenue [Line Items]
Revenue	12.8
Other Operating Segments and Business Activities | Beauty
Disaggregation of Revenue [Line Items]
Revenue	10.2
Other Operating Segments and Business Activities | Skincare
Disaggregation of Revenue [Line Items]
Revenue	4.7
Other Operating Segments and Business Activities | Fragrance
Disaggregation of Revenue [Line Items]
Revenue	2.2
Other Operating Segments and Business Activities | Color
Disaggregation of Revenue [Line Items]
Revenue	3.3
Other Operating Segments and Business Activities | Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	2.6
Other Operating Segments and Business Activities | Fashion
Disaggregation of Revenue [Line Items]
Revenue	1.9
Other Operating Segments and Business Activities | Home
Disaggregation of Revenue [Line Items]
Revenue	0.7
Other Operating Segments and Business Activities | Other revenue
Disaggregation of Revenue [Line Items]
Revenue	8.2
Other Operating Segments and Business Activities | Representative fees
Disaggregation of Revenue [Line Items]
Revenue	1.4
Other Operating Segments and Business Activities | Other
Disaggregation of Revenue [Line Items]
Revenue	6.8
Europe, Middle East & Africa | Reportable segments
Disaggregation of Revenue [Line Items]
Revenue	568.4
Europe, Middle East & Africa | Reportable segments | Net sales
Disaggregation of Revenue [Line Items]
Revenue	542.3
Europe, Middle East & Africa | Reportable segments | Beauty
Disaggregation of Revenue [Line Items]
Revenue	453.2
Europe, Middle East & Africa | Reportable segments | Skincare
Disaggregation of Revenue [Line Items]
Revenue	169.2
Europe, Middle East & Africa | Reportable segments | Fragrance
Disaggregation of Revenue [Line Items]
Revenue	163.2
Europe, Middle East & Africa | Reportable segments | Color
Disaggregation of Revenue [Line Items]
Revenue	120.8
Europe, Middle East & Africa | Reportable segments | Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	89.1
Europe, Middle East & Africa | Reportable segments | Fashion
Disaggregation of Revenue [Line Items]
Revenue	79.8
Europe, Middle East & Africa | Reportable segments | Home
Disaggregation of Revenue [Line Items]
Revenue	9.3
Europe, Middle East & Africa | Reportable segments | Other revenue
Disaggregation of Revenue [Line Items]
Revenue	26.1
Europe, Middle East & Africa | Reportable segments | Representative fees
Disaggregation of Revenue [Line Items]
Revenue	25.9
Europe, Middle East & Africa | Reportable segments | Other
Disaggregation of Revenue [Line Items]
Revenue	0.2
South Latin America | Reportable segments
Disaggregation of Revenue [Line Items]
Revenue	497.1
South Latin America | Reportable segments | Net sales
Disaggregation of Revenue [Line Items]
Revenue	459.7
South Latin America | Reportable segments | Beauty
Disaggregation of Revenue [Line Items]
Revenue	341.3
South Latin America | Reportable segments | Skincare
Disaggregation of Revenue [Line Items]
Revenue	141.8
South Latin America | Reportable segments | Fragrance
Disaggregation of Revenue [Line Items]
Revenue	118.6
South Latin America | Reportable segments | Color
Disaggregation of Revenue [Line Items]
Revenue	80.9
South Latin America | Reportable segments | Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	118.4
South Latin America | Reportable segments | Fashion
Disaggregation of Revenue [Line Items]
Revenue	46.5
South Latin America | Reportable segments | Home
Disaggregation of Revenue [Line Items]
Revenue	71.9
South Latin America | Reportable segments | Other revenue
Disaggregation of Revenue [Line Items]
Revenue	37.4
South Latin America | Reportable segments | Representative fees
Disaggregation of Revenue [Line Items]
Revenue	36.4
South Latin America | Reportable segments | Other
Disaggregation of Revenue [Line Items]
Revenue	1.0
North Latin America | Reportable segments
Disaggregation of Revenue [Line Items]
Revenue	195.6
North Latin America | Reportable segments | Net sales
Disaggregation of Revenue [Line Items]
Revenue	185.0
North Latin America | Reportable segments | Beauty
Disaggregation of Revenue [Line Items]
Revenue	121.2
North Latin America | Reportable segments | Skincare
Disaggregation of Revenue [Line Items]
Revenue	46.7
North Latin America | Reportable segments | Fragrance
Disaggregation of Revenue [Line Items]
Revenue	53.6
North Latin America | Reportable segments | Color
Disaggregation of Revenue [Line Items]
Revenue	20.9
North Latin America | Reportable segments | Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	63.8
North Latin America | Reportable segments | Fashion
Disaggregation of Revenue [Line Items]
Revenue	22.6
North Latin America | Reportable segments | Home
Disaggregation of Revenue [Line Items]
Revenue	41.2
North Latin America | Reportable segments | Other revenue
Disaggregation of Revenue [Line Items]
Revenue	10.6
North Latin America | Reportable segments | Representative fees
Disaggregation of Revenue [Line Items]
Revenue	10.6
North Latin America | Reportable segments | Other
Disaggregation of Revenue [Line Items]
Revenue	0.0
Asia Pacific | Reportable segments
Disaggregation of Revenue [Line Items]
Revenue	111.4
Asia Pacific | Reportable segments | Net sales
Disaggregation of Revenue [Line Items]
Revenue	109.8
Asia Pacific | Reportable segments | Beauty
Disaggregation of Revenue [Line Items]
Revenue	63.1
Asia Pacific | Reportable segments | Skincare
Disaggregation of Revenue [Line Items]
Revenue	31.4
Asia Pacific | Reportable segments | Fragrance
Disaggregation of Revenue [Line Items]
Revenue	18.6
Asia Pacific | Reportable segments | Color
Disaggregation of Revenue [Line Items]
Revenue	13.1
Asia Pacific | Reportable segments | Fashion And Home
Disaggregation of Revenue [Line Items]
Revenue	46.7
Asia Pacific | Reportable segments | Fashion
Disaggregation of Revenue [Line Items]
Revenue	39.7
Asia Pacific | Reportable segments | Home
Disaggregation of Revenue [Line Items]
Revenue	7.0
Asia Pacific | Reportable segments | Other revenue
Disaggregation of Revenue [Line Items]
Revenue	1.6
Asia Pacific | Reportable segments | Representative fees
Disaggregation of Revenue [Line Items]
Revenue	1.6
Asia Pacific | Reportable segments | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 0.0