Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Analysis of Changes in Number of Shares of Common Stock Outstanding

An analysis of changes in the number of shares of common stock outstanding follows:

TABLE 99: SHARES OF COMMON STOCK

	2019		2018		2017
Balance at January 1	219,012,050		226,126,674		228,605,485
Incentive Plan and Awards	1,688,931		1,310,778		1,320,129
Stock Options Exercised	786,931		575,662		1,997,362
Treasury Stock Purchased	(11,778,866	)	(9,001,064	)	(5,796,302	)
Balance at December 31	209,709,046		219,012,050		226,126,674