SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION - Plants, Property and Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Other Significant Noncash Transactions [Line Items]
Accumulated depreciation	$ 4,000		$ 4,000		$ 3,900
Depreciation	$ 33	$ 33	66	$ 66
Non-cash additions			8
Property, Plant and Equipment [Member]
Other Significant Noncash Transactions [Line Items]
Non-cash additions			$ 18		$ 20