Stock-Based Compensation Plans (All Registrants) (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

The following tables present the stock-based compensation expense included in Exelon's and PHI’s Consolidated Statements of Operations and Comprehensive Income for the years ended December 31, 2018, 2017 and 2016 and PHI's predecessor period January 1, 2016 to March 23, 2016:



Exelon	Year Ended December 31,
Components of Stock-Based Compensation Expense	2018			2017			2016^(a)
Performance share awards	$	143		$	107		$	93
Restricted stock units	57			77			75
Stock options	—			—			—
Other stock-based awards	8			7			7
Total stock-based compensation expense included in operating and maintenance expense	208			191			175
Income tax benefit	(54		)	(74		)	(68		)
Total after-tax stock-based compensation expense	$	154		$	117		$	107

__________


(a)	2016 amounts include expense related to stock-based compensation granted to eligible PHI employees since the merger date of March 23, 2016.

PHI



	Predecessor
	January 1 to March 23,
Components of Stock-Based Compensation Expense	2016
Time-based restricted stock units	$	2
Performance-based restricted stock units	1
Time-based restricted stock awards	—
Total stock-based compensation expense included in operating and maintenance expense	3
Income tax benefit	(1		)
Total after-tax stock-based compensation expense	$	2

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

The following tables present the Registrants' stock-based compensation expense (pre-tax) for the years ended December 31, 2018, 2017 and 2016, as well as for the PHI predecessor period January 1, 2016 to March 23, 2016:



	Year Ended December 31,
Subsidiaries	2018		2017		2016
Exelon	$	208	$	191	$	175
Generation	77		88		78
ComEd	8		7		8
PECO	5		3		3
BGE	3		1		1
BSC^(a)	111		88		81
PHI Successor^(b)(c)	4		4		4



	Predecessor
	January 1 to March 23,
	2016
PHI	$	3

__________


(a)	These amounts primarily represent amounts billed to Exelon’s subsidiaries through intercompany allocations. These amounts are not included in the Generation, ComEd, PECO, BGE or PHI amounts above.


(b)	Pepco's, DPL's and ACE's stock-based compensation expense for the years ended December 31, 2018 and 2017 was not material.


(c)	These amounts primarily represent amounts billed to PHI’s subsidiaries through PHISCO intercompany allocations.

Stock Based Compensation Tax Benefit

The following tables present information regarding Exelon’s tax benefits for the years ended December 31, 2018, 2017 and 2016.



Exelon	Year Ended December 31,
	2018	2017	2016
Realized tax benefit when exercised/distributed:
Restricted stock units	28	35	27
Performance share awards	16	29	18

Schedule of Share-based Compensation, Stock Options, Activity

The following table presents information with respect to stock option activity for the year ended December 31, 2018:



	Shares		Weighted Average Exercise Price (per share)		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
Balance of shares outstanding at December 31, 2017	6,723,611		$	47.69	2.65	$	7
Options exercised	(1,522,952	)	36.54
Options forfeited	—		—
Options expired	(1,173,007	)	74.99
Balance of shares outstanding at December 31, 2018	4,027,652		$	43.95	2.90	$	14
Exercisable at December 31, 2018 ^(a)	4,027,652		$	43.95	2.90	$	14

__________


(a)	Includes stock options issued to retirement eligible employees.

Stock Options Exercised

The following table summarizes additional information regarding stock options exercised for the years ended December 31, 2018, 2017 and 2016:



	Year Ended December 31,
	2018		2017		2016
Intrinsic value^(a)	$	12	$	15	$	11
Cash received for exercise price	56		107		19

__________


(a)	The difference between the market value on the date of exercise and the option exercise price.

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes Exelon’s nonvested restricted stock unit activity for the year ended December 31, 2018:

Exelon



	Shares		Weighted Average Grant Date Fair Value (per share)
Nonvested at December 31, 2017^(a)	3,389,503		$	32.24
Granted	1,321,988		38.60
Vested	(1,845,300	)	32.03
Forfeited	(65,046	)	32.96
Undistributed vested awards^(b)	(507,804	)	36.76
Nonvested at December 31, 2018^(a)	2,293,341		$	35.06

__________


(a)	Excludes 1,131,487 and 1,488,383 of restricted stock units issued to retirement-eligible employees as of December 31, 2018 and 2017, respectively, as they are fully vested.


(b)	Represents restricted stock units that vested but were not distributed to retirement-eligible employees during 2018.

Schedule of Nonvested Performance-based Units Activity

The following table summarizes Exelon’s nonvested performance share awards activity for the year ended December 31, 2018:

Exelon



	Shares		Weighted Average Grant Date Fair Value (per share)
Nonvested at December 31, 2017^(a)	2,956,966		$	32.65
Granted	1,637,542		38.15
Change in performance	1,348,029		30.66
Vested	(848,574	)	36.26
Forfeited	(50,467	)	36.24
Undistributed vested awards ^(b)	(1,640,268	)	33.38
Nonvested at December 31, 2018^(a)	3,403,228		$	33.13

__________


(a)	Excludes 3,586,259 and 2,723,440 of performance share awards issued to retirement-eligible employees as of December 31, 2018 and 2017, respectively, as they are fully vested.


(b)	Represents performance share awards that vested but were not distributed to retirement-eligible employees during 2018.

The following table summarizes the weighted average grant date fair value and the fair value of performance share awards granted and settled for the years ended December 31, 2018, 2017 and 2016:



	Year Ended December 31,
	2018^(a)		2017		2016
Weighted average grant date fair value (per share)	$	38.15	$	35.00	$	28.85
Fair value of performance shares settled	61		72		45
Fair value of performance shares settled in cash	49		56		28

__________


(a)	As of December 31, 2018, $33 million of total unrecognized compensation costs related to nonvested performance shares are expected to be recognized over the remaining weighted-average period of 1.7 years.

Not Settled Performance Share Awards Balance Sheet Presentation

The following table presents the balance sheet classification of obligations related to outstanding performance share awards not yet settled:



	December 31,
	2018		2017
Current liabilities^(a)	$	135	$	57
Deferred credits and other liabilities^(b)	109		100
Common stock	26		26
Total	$	270	$	183

__________


(a)	Represents the current liability related to performance share awards expected to be settled in cash.


(b)	Represents the long-term liability related to performance share awards expected to be settled in cash.