Capital Stock and Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

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, 2013	935,728,676		529,977,684
Common stock acquired	(25,573,317	)	25,573,317
Shares issued for stock options	7,883,834		(7,883,834	)
Shares issued for restricted stock units and other	1,907,382		(1,907,382	)
Balance, December 31, 2013	919,946,575		545,759,785
Common stock acquired	(23,131,081	)	23,131,081
Shares issued for stock options	7,977,124		(7,977,124	)
Shares issued for restricted stock units and other	1,919,527		(1,919,527	)
Balance, December 31, 2014	906,712,145		558,994,215
Common stock acquired	(22,802,784	)	22,802,784
Shares issued for stock options	7,394,839		(7,394,839	)
Shares issued for restricted stock units and other	1,434,318		(1,434,318	)
Balance, December 31, 2015	892,738,518		572,967,842

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:

	2015		2014		2013
Expected term of options	4.5 years		4.5 years		4.5 years
Expected volatility rate	17.6	%	17.1	%	18.4	%
Risk-free interest rate	1.5	%	1.6	%	1.5	%
Expected dividend yield	2.5	%	2.3	%	2.3	%

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

A summary of restricted stock unit activity during 2015 is presented below:

	Shares (in thousands)		Weighted Average Grant Date Fair Value Per Award
Restricted stock units as of January 1, 2015	3,694		$	56
Activity:
Granted	950		66
Vested	(1,364	)	51
Forfeited	(114	)	59
Restricted stock units as of December 31, 2015	3,166		$	61

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity during 2015 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, 2015	42,902		$	52
Granted	9,275		62
Exercised	(7,826	)	42
Forfeited or expired	(431	)	62
Options outstanding, December 31, 2015	43,920		56		4	$	485
Options exercisable, December 31, 2015	26,524		$	52	3	$	402