INCOME TAXES - Net Deferred Income Tax Assets And Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred income tax assets:
Self-insurance accruals	$ 110	$ 109
Net operating loss carryforwards	94	182
Accrued compensation and benefits	87	88
Pension benefits	50	27
Deferred revenue	133	131
Other	67	25
Deferred tax assets gross	541	562
Valuation allowance	(87)	(88)
Deferred tax assets net	454	474
Deferred income tax liabilities:
Property and equipment basis differences	(2,077)	(2,013)
Other	(22)	(18)
Deferred tax liabilities, gross	(2,099)	(2,031)
Net deferred income tax liability	(1,645)	(1,557)
Deferred tax assets included in Sales-type lease and other assets	$ 13	$ 14