INCOME TAXES - Components of deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss and capital loss carryforwards	$ 656	$ 70
Interest limitation carryforwards	111	0
Other comprehensive loss	106	53
Pension and other postretirement benefits	93	25
Research and development capitalization	57	74
Unrecognized tax benefits	47	49
Employee compensation	39	32
State tax credits	28	21
Warranty	27	15
Foreign tax credits	16	13
Other	161	97
Total deferred tax assets	1,341	449
Valuation allowance	(529)	(71)
Net deferred tax asset	812	378
Deferred tax liabilities:
Goodwill and intangible assets	(279)	(174)
Fixed assets	(176)	(144)
Unremitted foreign earnings	(156)	(56)
Unrealized gain on equity securities	(91)	0
Other	(95)	(50)
Total deferred tax liabilities	(797)	(424)
Net deferred taxes		$ (46)
Deferred income taxes	$ 15