Stock Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Stock Compensation Expense Allocation Within the Consolidated Statements of Income

Total stock compensation expense recognized is as follows:

	For Years Ended December 31,
	2017		2016		2015
COR	$	36	$	40	$	47
R&D		59		60		60
SG&A		147		152		169
Acquisition charges		—		—		10
Total	$	242	$	252	$	286

Schedule of Weighted Average Assumptions Used to Estimate the Fair Values for Non-qualified Stock Options

We estimate the fair values for non-qualified stock options using the Black-Scholes-Merton option-pricing model with the following weighted average assumptions:

	For Years Ended December 31,
	2017			2016			2015
Weighted average grant date fair value, per share	$	16.49		$	10.03		$	9.49
Weighted average assumptions used:
Expected volatility		24	%		25	%		22	%
Expected lives (in years)		7.2			7.3			7.3
Risk-free interest rates		2.36	%		1.72	%		1.64	%
Expected dividend yields		2.52	%		2.87	%		2.52	%

Schedule of Stock Option and RSU Transactions Under Long-term Incentive and Director Compensation Plans

Stock option and RSU transactions under our long-term incentive and director compensation plans are as follows:

	Stock Options					RSUs
				Weighted Average					Weighted Average
				Exercise Price					Grant Date Fair
	Shares			per Share		Shares			Value per Share
Outstanding grants, December 31, 2016		52,265,788		$	41.89		12,332,379		$	44.44
Granted		6,474,732			79.28		1,604,469			79.52
Stock options exercised/RSUs vested		(13,313,019	)		37.13		(4,419,464	)		33.65
Forfeited and expired		(672,908	)		57.12		(291,741	)		54.34
Outstanding grants, December 31, 2017		44,754,593			48.49		9,225,643			55.40

Schedule of Shares Outstanding Under Stock Option Plans, by Exercise Price Range

Summarized information about stock options outstanding as of December 31, 2017, is as follows:

		Stock Options Outstanding						Options Exercisable
		Number		Weighted Average		Weighted Average		Number		Weighted Average
Exercise Price		Outstanding		Remaining Contractual		Exercise Price		Exercisable		Exercise Price
Range		(Shares)		Life (Years)		per Share		(Shares)		per Share
$	14.47 to 20.00		1,230,810		1.1	$	14.97		1,230,810	$	14.97
	20.01 to 30.00		2,559,613		1.9		23.86		2,559,613		23.86
	30.01 to 40.00		9,441,380		4.3		33.02		9,441,380		33.02
	40.01 to 50.00		7,466,229		6.1		44.10		4,403,409		44.10
	50.01 to 60.00		17,689,385		7.6		53.42		4,472,432		53.61
	60.01 to 70.00		—		—		—		—		—
	70.01 to 80.00		6,347,174		9.1		79.19		6,470		71.03
	80.01 to 97.29		20,002		9.7		88.81		—		—
	14.47 to 97.29		44,754,593		6.4		48.49		22,114,114		37.34

Schedule of Stock Options That are Vested and Expected to Vest, Outstanding and Exercisable

Summarized information as of December 31, 2017, about outstanding stock options that are vested and expected to vest, as well as stock options that are currently exercisable, is as follows:

	Outstanding Stock Options
	(Fully Vested and		Options
	Expected to Vest) (a)		Exercisable
Number of outstanding (shares)		43,804,402		22,114,114
Weighted average remaining contractual life (in years)		6.3		4.8
Weighted average exercise price per share	$	48.12	$	37.34
Intrinsic value (millions of dollars)	$	2,467	$	1,484

(a) Includes effects of expected forfeitures of approximately 1 million shares. Excluding the effects of expected forfeitures, the aggregate intrinsic value of stock options outstanding was $2,504 million.

Schedule of Employee Stock Purchase Plan Transactions

Employee stock purchase plan transactions are as follows:

	Employee Stock
	Purchase Plan
	(Shares)			Exercise Price
Outstanding grants, December 31, 2016		283,400		$	62.55
Granted		984,536			55.19
Exercised		(1,065,757	)		67.62
Outstanding grants, December 31, 2017		202,179			89.74

Schedule of Changes in Treasury Stock

The following table reflects the changes in our treasury shares:

	Stock Options			RSUs			Treasury Shares
Balance, December 31, 2014								694,189,127
Repurchases								51,384,339
Shares used for:
Stock options/RSUs		(11,953,455	)		(3,386,415	)
Stock applied to exercises or taxes		8,562			845,164
ESPP		(1,532,264	)		—
Director deferred stock units		—			—			(7,531	)
Total issued		(13,477,157	)		(2,541,251	)		(16,018,408	)
Balance, December 31, 2015								729,547,527
Repurchases								35,480,036
Shares used for:
Stock options/RSUs		(14,516,606	)		(5,639,666	)
Stock applied to exercises or taxes		—			1,336,476
ESPP		(1,362,202	)		—
Director deferred stock units		—			—			(13,587	)
Total issued		(15,878,808	)		(4,303,190	)		(20,181,998	)
Balance, December 31, 2016								744,831,978
Repurchases								30,570,129
Shares used for:
Stock options/RSUs		(13,313,019	)		(4,419,464	)
Stock applied to exercises or taxes		—			1,058,100
ESPP		(1,065,757	)		—
Director deferred stock units		—			—			(4,750	)
Total issued		(14,378,776	)		(3,361,364	)		(17,740,140	)
Balance, December 31, 2017								757,657,217

Schedule of Cash Proceeds Received from Share-based Payment Awards

The effects on cash flows are as follows:

	For Years Ended December 31,
	2017			2016			2015
Proceeds from common stock transactions (a)	$	483		$	472		$	396
Tax benefit realized from stock compensation	$	341		$	255		$	171
Reduction to deferred tax asset		(91	)		(105	)		(81	)
Excess tax benefit for stock compensation	$	250		$	150		$	90

(a) Net of taxes paid for employee shares withheld of $83 million in 2017, $70 million in 2016 and $46 million in 2015.