Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Trade accounts receivable, net of doubtful accounts	$ 33	$ 30
Property, plant and equipment, net of accumulated depreciation	$ 14,492	$ 14,553
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50
Common stock, shares authorized (in shares)	3,800	3,800
Common stock, shares issued (in shares)	1,800	1,800
Treasury stock, shares at cost (in shares)	987	980