SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Leases) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Cash payments for financing lease	$ 26	$ 315	$ 142
Weighted average remaining lease term, finance lease	4 years 1 month 6 days	6 months
Weighted average discount rate, finance lease	4.60%	6.20%
Lease payments	$ 1,600	$ 1,600	$ 1,900
Weighted average remaining lease term. operating lease	7 years 1 month 6 days	7 years 6 months
Weighted average discount rate, operating lease	6.60%	6.50%