Condensed Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Property, plant and equipment, net of accumulated depreciation	$ 23,961	$ 23,613
Other assets, net of accumulated amortization	$ 1,076	$ 1,014
Common stock, par value (in dollars per share)	$ 5.00	$ 5.00
Common stock, shares authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, shares, issued (in shares)	1,012,261,159	1,012,261,159
Treasury stock, shares (in shares)	224,344,344	227,562,887
Mandatory convertible preferred stock
Preferred stock, dividend rate, percentage	6.00%	6.00%
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares, issued (in shares)	5,750,000	5,750,000
Preferred stock, liquidation preference, value	$ 5,750	$ 5,750