EMPLOYEE RETIREMENT PLANS - Amounts in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Amounts in the company's consolidated balance sheets
Accrued liabilities	$ (41)	$ (40)
Qualified
Amounts in the company's consolidated balance sheets
Other assets	1	1
Accrued liabilities	(1)	(1)
Other liabilities	(254)	(226)
Total net liability	(254)	(226)
Nonqualified Plan
Amounts in the company's consolidated balance sheets
Other assets	0	0
Accrued liabilities	(13)	(13)
Other liabilities	(148)	(142)
Total net liability	$ (161)	$ (155)