Consolidated Balance Sheets, as of December 31 (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 35	$ 37
Other receivables, allowances	$ 35	$ 37
Common stock, authorized (in shares)	5,000,000,000	5,000,000,000
Common stock, issued (in shares)	1,996,537,778	1,996,537,778
Treasury stock, at cost (in shares)	714,961,364	678,708,640