Consolidated Statement of Shareholders Investment (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Shares:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period (in shares)	1,981,156,896	1,976,855,085	1,971,189,465
Issued under incentive stock programs (in shares)	4,116,525	4,301,811	5,665,620
Balance at end of period (in shares)	1,985,273,421	1,981,156,896	1,976,855,085
Common Shares Held in Treasury:
Increase (Decrease) in Shareholders' Investment
Balance at beginning of period (in shares)	209,926,622	214,351,838	215,570,043
Issued under incentive stock programs (in shares)	5,650,168	6,290,757	7,796,030
Purchased (in shares)	16,914,774	1,865,541	6,577,825
Balance at end of period (in shares)	221,191,228	209,926,622	214,351,838
Earnings Employed in the Business:
Increase (Decrease) in Shareholders' Investment
Cash dividends declared per common share	$ 1.82	$ 1.53	$ 1.32