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Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

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

Assumptions Used to Determine Weighted-Average Fair Value of Options Granted

The weighted average fair value of options granted in 2017, 2016 and 2015 was $7.04, $5.89 and $6.46 per option, respectively, and were determined using the following assumptions:



Years Ended December 31	2017		2016		2015
Expected dividend yield	3.6	%	3.8	%	4.1	%
Risk-free interest rate	2.0	%	1.4	%	1.7	%
Expected volatility	17.8	%	19.6	%	19.9	%
Expected life (years)	6.1		6.2		6.2

Summarized Information Relative to Stock Option Plan Activity

Summarized information relative to stock option plan activity (options in thousands) is as follows:



	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding January 1, 2017	45,091		$	44.47
Granted	4,232		63.88
Exercised	(11,512	)	43.38
Forfeited	(1,537	)	51.78
Outstanding December 31, 2017	36,274		$	46.77	4.89	$	397
Exercisable December 31, 2017	26,778		$	42.54	3.64	$	384

Additional Information Pertaining to Stock Option Plans

Additional information pertaining to stock option plans is provided in the table below:



Years Ended December 31	2017		2016		2015
Total intrinsic value of stock options exercised	$	236	$	444	$	332
Fair value of stock options vested	30		28		30
Cash received from the exercise of stock options	499		939		485

Summary of Nonvested RSU and PSU Activity

A summary of nonvested RSU and PSU activity (shares in thousands) is as follows:



	RSUs				PSUs
	Number of Shares		Weighted Average Grant Date Fair Value		Number of Shares		Weighted Average Grant Date Fair Value
Nonvested January 1, 2017	13,266		$	57.19	1,744		$	59.24
Granted	5,014		63.85		1,008		63.62
Vested	(3,795	)	58.13		(833	)	62.71
Forfeited	(876	)	58.22		(51	)	60.24
Nonvested December 31, 2017	13,609		$	59.32	1,868		$	60.03