Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Condensed Consolidated Balance Sheet
Trade receivables, allowances (in dollars)	$ 640	$ 519
Preferred shares, par value (in dollars per share)	$ 1	$ 1
Preferred shares, authorized shares	1,000,000	1,000,000
Preferred shares, issued shares	0	0
Common shares, authorized shares	2,400,000,000	2,400,000,000
Common shares, issued shares	1,985,525,053	1,985,273,421
Common shares held in treasury, shares	234,582,764	221,191,228