Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Components of Lease Cost [Table Text Block]

ROU assets obtained in exchange for lease obligations for the year ended December 31, 2019 were as follows:

	Exelon		Generation		ComEd		PECO		BGE		PHI			Pepco			DPL			ACE
Operating leases	$	52	$	14	$	6	$	—	$	2	$	(3	)	$	(1	)	$	(2	)	$	(1	)

The weighted average remaining lease terms, in years, and discount rates for operating leases as of December 31, 2019 were as follows:

	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Remaining lease term	10.1		10.6		4.6		4.4		5.4		9.0		9.8		9.7		4.7
Discount rate	4.6	%	4.8	%	3.0	%	3.2	%	3.6	%	4.2	%	4.0	%	4.0	%	3.6	%

The components of lease costs for the year ended December 31, 2019 were as follows:

	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Operating lease costs	$	320	$	222	$	3	$	1	$	33	$	48	$	12	$	14	$	7
Variable lease costs	300		282		2		—		2		6		2		2		1
Short-term lease costs	19		19		—		—		—		—		—		—		—
Total lease costs (a)	$	639	$	523	$	5	$	1	$	35	$	54	$	14	$	16	$	8

__________

(a)

Excludes $51 million, $44 million, $7 million and $7 million of sublease income recorded at Exelon, Generation, PHI and DPL.

Schedule of Rent Expense [Table Text Block]

The following table presents the Registrants' rental expense under the prior lease accounting guidance for the years ended December 31, 2018 and 2017:

	Exelon		Generation(a)		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
2018	$	670	$	558	$	7	$	10	$	35	$	48	$	10	$	13	$	8
2017	709		578		9		9		32		63		11		16		14

Supplemental Balance Sheet Information Related to Lessee Right-of-Use Assets and Lease Liabilities [Table Text Block]

The following table provides additional information regarding the presentation of operating ROU assets and lease liabilities within the Registrants’ Consolidated Balance Sheets as of December 31, 2019:

	Exelon(a)		Generation(a)		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Operating lease ROU assets
Other deferred debits and other assets	$	1,305	$	895	$	9	$	2	$	77	$	273	$	56	$	63	$	18
Operating lease liabilities
Other current liabilities	225		157		3		—		32		31		6		9		4
Other deferred credits and other liabilities	1,307		925		8		1		50		254		51		65		14
Total operating lease liabilities	$	1,532	$	1,082	$	11	$	1	$	82	$	285	$	57	$	74	$	18

__________

(a)

Exelon's and Generation's operating ROU assets and lease liabilities include $515 million and $664 million, respectively, related to contracted generation.

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Future minimum lease payments for operating leases as of December 31, 2019 were as follows:

Year	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
2020	$	287	$	203	$	3	$	—	$	34	$	42	$	8	$	11	$	5
2021	243		162		4		1		31		41		8		11		4
2022	177		113		2		—		16		38		8		10		4
2023	145		100		1		—		1		37		7		9		3
2024	140		97		1		—		—		35		5		9		2
Remaining years	976		741		1		—		18		153		34		41		2
Total	1,968		1,416		12		1		100		346		70		91		20
Interest	436		334		1		—		18		61		13		17		2
Total operating lease liabilities	$	1,532	$	1,082	$	11	$	1	$	82	$	285	$	57	$	74	$	18

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum lease payments for operating leases under the prior lease accounting guidance as of December 31, 2018 were as follows:

	Exelon(a)(b)		Generation(a)(b)		ComEd(a)(c)		PECO(a)(c)		BGE(a)(c)(d)(e)		PHI(a)		Pepco(a)		DPL(a)(c)		ACE(a)
2019	$	140	$	33	$	7	$	5	$	35	$	48	$	11	$	14	$	7
2020	149		46		5		5		35		46		10		13		6
2021	143		46		4		5		33		43		9		12		5
2022	126		47		4		5		18		42		8		12		5
2023	97		46		3		5		3		39		8		10		4
Remaining years	723		545		—		—		19		159		40		35		5
Total minimum future lease payments	$	1,378	$	763	$	23	$	25	$	143	$	377	$	86	$	96	$	32

__________

(a) Includes amounts related to shared use land arrangements.

(b) Excludes Generation’s contingent operating lease payments associated with contracted generation.

(c) Amounts related to certain real estate leases and railroad licenses effectively have indefinite payment periods. As a result, ComEd, PECO, BGE and DPL have excluded these payments from the remaining years as such amounts would not be meaningful. ComEd's, PECO’s, BGE’s and DPL's average annual obligation for these arrangements, included in each of the years 2019 - 2023, was $3 million, $5 million, $1 million and $1 million respectively. Also includes amounts related to shared use land arrangements.

(d) Includes all future lease payments on a 99-year real estate lease that expires in 2106.

(e)

The BGE column above includes minimum future lease payments associated with a 6-year lease for the Baltimore City conduit system that became effective during the fourth quarter of 2016. BGE's total commitments under the lease agreement are $26 million, $28 million, $28 million and $14 million related to years 2019 - 2022, respectively.

Schedule of Supplemental Cash Flow Information Related to Leases [Table Text Block]

Cash paid for amounts included in the measurement of lease liabilities for the year ended December 31, 2019 were as follows:

	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Operating cash flows from operating leases	$	287	$	206	$	3	$	—	$	33	$	37	$	9	$	6	$	5

Components of Operating Lease Income [Table Text Block]

The components of lease income for the year ended December 31, 2019 were as follows:

	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Operating lease income	$	54	$	47	$	—	$	—	$	—	$	5	$	—	$	4	$	—
Variable lease income	$	261	$	258	$	—	$	—	$	—	$	3	$	—	$	3	$	—

Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block]

Future minimum lease payments to be recovered under operating leases as of December 31, 2019 were as follows:

Year	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
2020	$	51	$	46	$	—	$	—	$	—	$	4	$	—	$	3	$	—
2021	51		45		—		—		—		4		1		3		—
2022	50		45		—		—		—		4		—		3		—
2023	49		44		—		—		—		5		—		4		—
2024	48		44		—		—		—		4		—		4		—
Remaining years	265		226		1		3		1		34		—		34		—
Total	$	514	$	450	$	1	$	3	$	1	$	55	$	1	$	51	$	—