Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment - accumulated depreciation	$ 1,956	$ 1,744
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized shares	1,250,000	1,250,000
Common stock, issued shares	971,055	1,160,779
Common stock, outstanding shares	971,055	1,160,779
Affiliates
Accounts payable to affiliates	$ 1	$ 2
Deferred revenue from affiliates	$ 28	$ 12