Condensed Consolidated Statement of Shareholders' Investment (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Common Shares:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period (in shares)	1,979,594,379	1,976,248,129	1,976,855,085	1,971,189,465
Issued under incentive stock programs (in shares)	1,172,844	457,156	3,912,138	5,515,820
Balance at end of period (in shares)	1,980,767,223	1,976,705,285	1,980,767,223	1,976,705,285
Common Shares Held in Treasury:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period (in shares)	209,064,380	208,850,514	214,351,838	215,570,043
Issued under incentive stock programs (in shares)	664,727	605,458	6,211,326	7,591,844
Purchased (in shares)	5,989	4,524	265,130	271,381
Balance at end of period (in shares)	208,405,642	208,249,580	208,405,642	208,249,580
Earnings Employed in the Business:
Increase (Decrease) in Shareholders' Investment
Cash dividends declared per common share	$ 0.36	$ 0.32	$ 1.08	$ 0.96