LEASES (Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease assets	$ 604	$ 518
Finance lease assets	22	35
Total lease assets	626	553
Current operating lease liabilities	141	145
Current finance lease liabilities	2	3
Noncurrent operating lease liabilities	499	413
Noncurrent finance lease liabilities	25	30
Total lease liabilities	667	591
Right-of-use asset, accumulated amortization	$ 14	$ 24