Stock Compensation (Tables)

12 Months Ended

Dec. 31, 2018

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,
	2018		2017		2016
COR	$	25	$	36	$	40
R&D		69		59		60
SG&A		138		147		152
Total	$	232	$	242	$	252

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,
	2018			2017			2016
Weighted average grant date fair value, per share	$	23.20		$	16.49		$	10.03
Weighted average assumptions used:
Expected volatility		23	%		24	%		25	%
Expected lives (in years)		7.2			7.2			7.3
Risk-free interest rates		2.57	%		2.36	%		1.72	%
Expected dividend yields		2.25	%		2.52	%		2.87	%

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, 2017		44,754,593		$	48.49		9,225,643		$	55.40
Granted		4,617,486			110.07		1,247,239			110.05
Stock options exercised/RSUs vested		(8,432,458	)		42.63		(2,769,994	)		44.50
Forfeited and expired		(1,034,167	)		77.30		(397,345	)		70.34
Outstanding grants, December 31, 2018		39,905,454			56.10		7,305,543			66.72

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

Summarized information about stock options outstanding as of December 31, 2018, 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		573,629		0.1	$	14.96		573,629	$	14.96
	20.01 to 40.00		9,508,056		2.9		31.21		9,508,056		31.21
	40.01 to 60.00		19,883,804		6.2		50.95		12,397,285		49.53
	60.01 to 80.00		5,612,386		8.1		79.21		1,143,118		79.20
	80.01 to 100.00		37,917		9.3		91.16		3,714		91.54
	100.01 to 113.30		4,289,662		9.1		110.15		—		—
	14.47 to 113.30		39,905,454		5.9		56.10		23,625,802		42.76

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

Summarized information as of December 31, 2018, 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)		39,274,492		23,625,802
Weighted average remaining contractual life (in years)		5.9		4.7
Weighted average exercise price per share	$	55.60	$	42.76
Intrinsic value (millions of dollars)	$	1,591	$	1,222

(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 $1.60 billion.

Schedule of ESPP Transactions

ESPP transactions are as follows:

	ESPP
	(Shares)			Exercise Price
Outstanding grants, December 31, 2017		202,179		$	89.74
Granted		847,535			87.48
Exercised		(819,878	)		90.06
Outstanding grants, December 31, 2018		229,836			80.29

Schedule of Changes in Treasury Stock

The following table reflects the changes in our treasury shares:

	Stock Options			RSUs			Treasury Shares
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 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 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
Repurchases								49,482,220
Shares used for:
Stock options/RSUs		(8,432,458	)		(2,769,994	)
Stock applied to taxes		—			553,720
ESPP		(819,878	)		—
Director deferred stock units		—			—			(5,181	)
Total issued		(9,252,336	)		(2,216,274	)		(11,468,610	)
Balance, December 31, 2018								795,665,646

Schedule of Cash Proceeds Received from Share-based Payment Awards

The effects on cash flows are as follows:

	For Years Ended December 31,
	2018			2017			2016
Proceeds from common stock transactions (a)	$	373		$	483		$	472
Tax benefit realized from stock compensation	$	179		$	341		$	255
Reduction to deferred tax asset		(43	)		(91	)		(105	)
Excess tax benefit for stock compensation	$	136		$	250		$	150

(a) Net of taxes paid for employee shares withheld of $60 million, $83 million and $70 million in 2018, 2017 and 2016, respectively.