DEBT - 5.75% Senior Unsecured Notes due 2024 (Details) - HDS - Unsecured debt - 5.75% April 2016 Senior Unsecured Notes due 2024 - USD ($) $ in Millions	Oct. 11, 2018	Sep. 13, 2018	Apr. 15, 2019	Sep. 26, 2018	Jan. 28, 2018	Apr. 11, 2016
DEBT
Interest rate, stated rate (as a percent)	5.75%		7.00%		5.75%	5.75%
Redemption of outstanding principal amount of long-term debt	$ 1,000
Prior to the October 11, 2018
DEBT
Interest rate, stated rate (as a percent)				5.75%
Redemption of outstanding principal amount of long-term debt		$ 1,000