LEASES - Right-of-use Assets and Right-of-use Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019
Right-of-use assets included in:
Other non-current assets	$ 271	$ 302
Lease liabilities included in:
Accrued and other current liabilities	53
Other non-current liabilities	240
Present value of remaining lease payments	$ 293	$ 302