CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CONSOLIDATED STATEMENT OF CHANGES IN EQUITY
Cash dividend per common share	$ 4.64	$ 4.40
Common stock issued under employee plans (in shares)	3,208,989	3,372,586
Purchases of treasury stock under employee plans (in shares)	978,004	960,186
Sales of treasury stock under employee plans (in shares)	365,600	363,335
Other treasury shares purchased, not retired (in shares)	15,982,033	22,851,760