Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Stock-Based Compensation

Stock-based compensation cost included in income from continuing operations

($ in millions)
For the year ended December 31:	2020		2019		2018
Cost	$	153	$	100	$	82
SG&A expense		586		453		361
RD&E expense		198		126		67
Pre-tax stock-based compensation cost		937		679		510
Income tax benefits		(213)		(155)		(116)
Net stock-based compensation cost	$	724	$	524	$	393

Summary of Restricted Stock Units activity

	RSUs			PSUs
	Weighted-Average			Weighted-Average
	Grant Price		Number of Units	Grant Price		Number of Units
Balance at January 1, 2018	$	141	8,555,263	$	144	2,649,313
Awards granted		121	4,806,790		130	909,140
Awards released		148	(2,579,962)		152	(666,244)
Awards canceled/forfeited/performance adjusted		139	(979,387)		147	(472,514)	*
Balance at December 31, 2018	$	130	9,802,704	$	136	2,419,695	**
Awards granted		119	5,650,861		117	1,395,534
Awards released		136	(3,145,016)		140	(846,672)
Awards canceled/forfeited/performance adjusted		128	(981,921)		131	(112,107)	*
Balance at December 31, 2019	$	123	11,326,628	$	126	2,856,450	**
Awards granted		115	10,651,955		117	1,582,666
Awards released		126	(3,781,240)		137	(630,974)
Awards canceled/forfeited/performance adjusted		121	(1,300,639)		125	(256,642)	*
Balance at December 31, 2020	$	117	16,896,704	$	120	3,551,500	**

* Includes adjustments of (70,089), (8,544) and (328,120) PSUs for 2020, 2019 and 2018, respectively, 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 Performance Share Units activity

	RSUs			PSUs
	Weighted-Average			Weighted-Average
	Grant Price		Number of Units	Grant Price		Number of Units
Balance at January 1, 2018	$	141	8,555,263	$	144	2,649,313
Awards granted		121	4,806,790		130	909,140
Awards released		148	(2,579,962)		152	(666,244)
Awards canceled/forfeited/performance adjusted		139	(979,387)		147	(472,514)	*
Balance at December 31, 2018	$	130	9,802,704	$	136	2,419,695	**
Awards granted		119	5,650,861		117	1,395,534
Awards released		136	(3,145,016)		140	(846,672)
Awards canceled/forfeited/performance adjusted		128	(981,921)		131	(112,107)	*
Balance at December 31, 2019	$	123	11,326,628	$	126	2,856,450	**
Awards granted		115	10,651,955		117	1,582,666
Awards released		126	(3,781,240)		137	(630,974)
Awards canceled/forfeited/performance adjusted		121	(1,300,639)		125	(256,642)	*
Balance at December 31, 2020	$	117	16,896,704	$	120	3,551,500	**

* Includes adjustments of (70,089), (8,544) and (328,120) PSUs for 2020, 2019 and 2018, respectively, 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 total fair value of RSUs and PSUs granted and vested

($ in millions)
For the year ended December 31:	2020		2019		2018
RSUs
Granted	$	1,220	$	674	$	583
Vested		478		428		381
PSUs
Granted	$	186	$	164	$	118
Vested		86		118		101