BUSINESS COMBINATIONS - Burberry Business Acquisition (Details)			3 Months Ended		6 Months Ended	9 Months Ended
	Oct. 02, 2017 USD ($)	Oct. 02, 2017 GBP (£)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Oct. 02, 2017 GBP (£)	Jun. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)
Business Acquisition [Line Items]
Business combination, range of outcomes, low | £									£ 0
Business combination, range of outcomes, high | £									16,700,000
Goodwill			$ 8,972,800,000		$ 8,972,800,000	$ 8,972,800,000				$ 8,555,500,000
Amortization expense			92,800,000	$ 102,600,000		260,600,000	$ 219,000,000
Burberry Beauty Business
Business Acquisition [Line Items]
Total consideration to acquire business	$ 250,100,000	£ 187,100,000
Cash paid to acquire business	245,100,000	£ 183,300,000
Business combination, contingent consideration	$ 5,000,000								£ 3,800,000
Goodwill			23,200,000		23,200,000	23,200,000		$ 68,200,000
Revenue from acquiree since acquisition date			36,000,000.0		44,200,000
Earnings from acquiree since date of acquisition			1,700,000.0		(7,400,000)
Amortization expense			5,800,000			11,200,000
Luxury
Business Acquisition [Line Items]
Goodwill			3,067,100,000		3,067,100,000	3,067,100,000				3,093,100,000
Luxury | Burberry Beauty Business
Business Acquisition [Line Items]
Goodwill											$ 11,700,000
Consumer Beauty
Business Acquisition [Line Items]
Goodwill			4,903,000,000		4,903,000,000	4,903,000,000				4,494,900,000
Consumer Beauty | Burberry Beauty Business
Business Acquisition [Line Items]
Goodwill											6,200,000
Professional Beauty
Business Acquisition [Line Items]
Goodwill			$ 1,002,700,000		$ 1,002,700,000	$ 1,002,700,000				$ 967,500,000
Professional Beauty | Burberry Beauty Business
Business Acquisition [Line Items]
Goodwill											$ 5,300,000