Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Stock-Based Compensation

Stock-based compensation cost included in income from continuing operations

($ in millions)
For the year ended December 31:	2015		2014		2013
Cost	$	100	$	121	$	122
Selling, general and administrative		322		350		435
Research, development and engineering		51		54		57
Other (income) and expense*		(6)		(13)		—
Pre-tax stock-based compensation cost		468		512		614
Income tax benefits		(156)		(174)		(213)
Net stock-based compensation cost	$	312	$	338	$	402
* Reflects the one-time effects related to divestitures.

Summary of Restricted Stock Units activity

	2015			2014			2013
	Weighted-			Weighted-			Weighted-
	Average		Number	Average		Number	Average		Number
	Grant Price		of Units	Grant Price		of Units	Grant Price		of Units
Balance at January 1	$	171	7,734,277	$	166	8,635,317	$	148	9,841,461
RSUs granted		143	4,230,186		172	2,525,947		189	2,541,081
RSUs released		164	(3,567,495)		157	(2,401,761)		131	(2,952,363)
RSUs canceled/forfeited		167	(869,627)		167	(1,025,226)		154	(794,862)
Balance at December 31	$	159	7,527,341	$	171	7,734,277	$	166	8,635,317

Summary of Performance Share Units activity

PSUs
	2015			2014			2013
	Weighted-			Weighted-			Weighted-
	Average		Number	Average		Number	Average		Number
	Grant Price		of Units	Grant Price		of Units	Grant Price		of Units
Balance at January 1	$	185	3,140,707	$	178	2,824,294	$	151	3,172,201
PSUs granted at target		153	1,137,242		180	1,430,098		195	869,875
Performance adjustments*		185	(168,055)		157	29,960		118	152,069
PSUs released		185	(840,552)		157	(1,027,181)		118	(1,321,784)
PSUs canceled/forfeited		184	(340,410)		187	(116,464)		170	(48,067)
Balance at December 31**	$	173	2,928,932	$	185	3,140,707	$	178	2,824,294

*    Represents the change in shares issued to employees after vesting of PSUs because final performance metrics were above or below specified targets.

**   Represents the number of shares expected to be issued based on achievement of grant date performance targets. The actual number of shares issued will depend on final performance against specified targets over the vesting period.

Summary of option activity

	2015			2014			2013
	Weighted-		Number of	Weighted-		Number of	Weighted-		Number of
	Average		Shares	Average		Shares	Average		Shares
	Exercise Price		Under Option	Exercise Price		Under Option	Exercise Price		Under Option
Balance at January 1	$	97	1,750,949	$	97	5,622,951	$	94	11,389,721
Options exercised		98	(1,214,109)		97	(3,740,252)		90	(5,585,127)
Options canceled/expired		100	(57,066)		95	(131,750)		86	(181,643)
Balance at December 31	$	94	479,774	$	97	1,750,949	$	97	5,622,951
Exercisable at December 31	$	94	479,774	$	97	1,750,949	$	97	5,622,951

Options outstanding and exercisable with exercise price ranges

	Options Outstanding and Exercisable
						Weighted-Average
	Weighted-		Number of	Aggregate		Remaining
	Average		Shares	Intrinsic		Contractual Life
Exercise Price Range	Exercise Price		Under Option	Value		(in Years)
$85 and under	$	83	192,959	$	10,597,402	0.3
$86 and over		101	286,815		10,376,342	1.2
	$	94	479,774	$	20,973,745	0.9