LEGAL PROCEEDINGS - Completed or Inactive Matters (Details) - Settled Litigation $ in Millions		9 Months Ended
	Aug. 19, 2019 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2015 manufacturer
Contact Lens Antitrust Class Actions
Loss Contingencies [Line Items]
Number of manufacturers | manufacturer			3
Settlement, agreed to pay	$ 10
Mississippi Attorney General Consumer Protection Action
Loss Contingencies [Line Items]
Settlement, agreed to pay		$ 0