Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 84	$ 89
Accumulated depreciation	$ 12,486	$ 12,390
Common Stock, shares authorized (in shares)	450	450
Common Stock, shares outstanding (in shares)	287	286