Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

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 77: SHARES OF COMMON STOCK

	2016		2015		2014
Balance at January 1	229,293,783		233,390,705		237,322,035
Incentive Plan and Awards	1,209,124		1,033,664		1,040,015
Stock Options Exercised	4,156,728		1,721,282		2,515,769
Treasury Stock Purchased	(6,054,150	)	(6,851,868	)	(7,487,114	)
Balance at December 31	228,605,485		229,293,783		233,390,705