Capital Stock and Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule Of Common And Treasury Stock Activity

A summary of common stock and treasury stock activity for the three years ended December 31, is as follows:

	Common Stock Outstanding		Treasury Stock
Balance, January 1, 2016	892,738,518		572,967,842
Common stock acquired	(19,271,304	)	19,271,304
Shares issued for stock options	8,536,639		(8,536,639	)
Shares issued for restricted stock units and other	1,105,110		(1,105,110	)
Balance, December 31, 2016	883,108,963		582,597,397
Common stock acquired	(19,185,828	)	19,185,828
Shares issued for stock options	9,670,988		(9,670,988	)
Shares issued for restricted stock units and other	1,106,995		(1,106,995	)
Balance, December 31, 2017	874,701,118		591,005,242
Common stock acquired	(18,786,897	)	18,786,897
Shares issued for stock options	6,040,920		(6,040,920	)
Shares issued for restricted stock units and other	957,651		(957,651	)
Balance, December 31, 2018	862,912,792		602,793,568

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

Fair value is estimated using the Black-Scholes option pricing model with the assumptions summarized in the following table:

	2018		2017		2016
Expected term of options	4.5 years		4.5 years		4.5 years
Expected volatility rate	17.7	%	16.0	%	16.7	%
Risk-free interest rate	2.8	%	1.8	%	1.2	%
Expected dividend yield	2.5	%	2.2	%	2.1	%

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of restricted stock unit activity during 2018 is presented below:

	Shares (in thousands)		Weighted Average Grant Date Fair Value Per Award
Restricted stock units as of January 1, 2018	2,730		$	70
Activity:
Granted	814		69
Vested	(901	)	65
Forfeited	(169	)	70
Restricted stock units as of December 31, 2018	2,474		$	71

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity during 2018 is presented below:

	Shares (in thousands)		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)	Intrinsic Value of Unexercised In-the-Money Options
Options outstanding, January 1, 2018	40,979		$	65
Granted	6,290		68
Exercised	(6,669	)	55
Forfeited or expired	(890	)	71
Options outstanding, December 31, 2018	39,710		67		3	$	1,457
Options exercisable, December 31, 2018	26,420		$	66	3	$	1,457