CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Property and equipment, accumulated depreciation	$ 4,044	$ 3,980
Common shares, par value	$ 1.25	$ 1.25
Common shares, authorized	1,360,000,000	1,360,000,000
Common shares, issued	725,671,000	725,845,000
Common shares, outstanding	725,671,000	725,845,000