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Debt and Credit Agreements (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Schedule of Short-term Debt | The following table reflects the Registrants' commercial paper programs supported by the revolving credit agreements and bilateral credit agreements at December 31, 2018 and 2017:
| Maximum Program Size at December 31, |  | Outstanding Commercial Paper at December 31, |  | Average Interest Rate on Commercial Paper Borrowings for the Year Ended December 31,
Commercial Paper Issuer | 2018(a)(b)(c) |  | 2017(a)(b)(c) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Exelon Corporate | $ | 600 |  |  | $ | 600 |  |  | $ | — |  |  | $ | — |  |  | 1.93 | % |  | 1.16 | %
Generation | 5,300 |  |  | 5,300 |  |  | — |  |  | — |  |  | 1.96 | % |  | 1.23 | %
ComEd | 1,000 |  |  | 1,000 |  |  | — |  |  | — |  |  | 2.14 | % |  | 1.24 | %
PECO | 600 |  |  | 600 |  |  | — |  |  | — |  |  | 2.24 | % |  | 1.13 | %
BGE | 600 |  |  | 600 |  |  | 35 |  |  | 77 |  |  | 2.18 | % |  | 1.28 | %
Pepco | 300 |  |  | 500 |  |  | 40 |  |  | 26 |  |  | 2.24 | % |  | 1.06 | %
DPL | 300 |  |  | 500 |  |  | — |  |  | 216 |  |  | 2.07 | % |  | 1.48 | %
ACE | 300 |  |  | 350 |  |  | 14 |  |  | 108 |  |  | 2.21 | % |  | 1.43 | %
Total | $ | 9,000 |  |  | $ | 9,450 |  |  | $ | 89 |  |  | $ | 427 |  |  |  |  |
__________
(a) | Excludes $545 million and $480 million in bilateral credit facilities at December 31, 2018 and 2017, respectively, and $159 million and $179 million in credit facilities for project finance at December 31, 2018 and 2017, respectively. These credit facilities do not back Generation's commercial paper program.
(b) | At December 31, 2018, excludes $135 million of credit facility agreements arranged at minority and community banks at Generation, ComEd, PECO, BGE, Pepco, DPL and ACE with aggregate commitments of $49 million, $33 million, $34 million, $5 million, $5 million, $5 million and $5 million, respectively. These facilities expire on October 11, 2019. These facilities are solely utilized to issue letters of credit. At December 31, 2017, excludes $128 million of credit facility agreements arranged at minority and community banks at Generation, ComEd, PECO, BGE, Pepco, DPL and ACE with aggregate commitments of $49 million, $34 million, $34 million, $5 million, $2 million, $2 million, and $2 million, respectively.
(c) | Pepco, DPL and ACE's revolving credit facility is subject to available borrowing capacity. The borrowing capacity may be increased or decreased during the term of the facility, except that (i) the sum of the borrowing capacity must equal the total amount of the facility, and (ii) the aggregate amount of credit used at any given time by each of Pepco, DPL or ACE may not exceed $900 million or the maximum amount of short-term debt the company is permitted to have outstanding by its regulatory authorities. The total number of the borrowing reallocations may not exceed eight per year during the term of the facility.
The following tables present the short-term borrowings activity for Exelon, Generation, ComEd, PECO, BGE, PHI, Pepco, DPL and ACE during 2018, 2017 and 2016.
Exelon |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 531 |  |  | $ | 823 |  |  |  | $ | 1,125 |
Maximum borrowings outstanding | 1,237 |  |  | 2,147 |  |  |  | 3,076 |
Average interest rates, computed on a daily basis | 2.21 | % |  | 1.32 | % |  |  | 0.88 | %
Average interest rates, at December 31 | 2.15 | % |  | 1.24 | % |  |  | 1.12 | %
Generation |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 37 |  |  | $ | 405 |  |  |  | $ | 536 |
Maximum borrowings outstanding | 583 |  |  | 1,455 |  |  |  | 1,735 |
Average interest rates, computed on a daily basis | 1.96 | % |  | 1.23 | % |  |  | 0.94 | %
Average interest rates, at December 31 | 1.96 | % |  | 1.23 | % |  |  | 1.14 | %
ComEd |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 154 |  |  | $ | 200 |  |  |  | $ | 256 |
Maximum borrowings outstanding | 520 |  |  | 470 |  |  |  | 755 |
Average interest rates, computed on a daily basis | 2.14 | % |  | 1.24 | % |  |  | 0.77 | %
Average interest rates, at December 31 | 2.14 | % |  | 1.24 | % |  |  | N/A |
PECO |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 68 |  |  | $ | 2 |  |  |  | $ | — |
Maximum borrowings outstanding | 350 |  |  | 60 |  |  |  | — |
Average interest rates, computed on a daily basis | 2.24 | % |  | 1.13 | % |  |  | N/A |
Average interest rates, at December 31 | 2.24 | % |  | 1.13 | % |  |  | N/A |
BGE |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 65 |  |  | $ | 54 |  |  |  | $ | 143 |
Maximum borrowings outstanding | 239 |  |  | 165 |  |  |  | 369 |
Average interest rates, computed on a daily basis | 2.18 | % |  | 1.28 | % |  |  | 0.77 | %
Average interest rates, computed at December 31 | 2.18 | % |  | 1.28 | % |  |  | 0.95 | %
PHI Corporate |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | N/A |  |  | N/A |  |  |  | $ | 153 |
Maximum borrowings outstanding | N/A |  |  | N/A |  |  |  | 559 |
Average interest rates, computed on a daily basis | N/A |  |  | N/A |  |  |  | 1.03 | %
Average interest rates, computed at December 31 | N/A |  |  | N/A |  |  |  | N/A |
Pepco |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 22 |  |  | $ | 51 |  |  |  | $ | 4 |
Maximum borrowings outstanding | 90 |  |  | 197 |  |  |  | 73 |
Average interest rates, computed on a daily basis | 2.24 | % |  | 1.06 | % |  |  | 0.71 | %
Average interest rates, computed at December 31 | 2.24 | % |  | 1.06 | % |  |  | 0.90 | %
DPL |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 87 |  |  | $ | 40 |  |  |  | $ | 33 |
Maximum borrowings outstanding | 245 |  |  | 216 |  |  |  | 116 |
Average interest rates, computed on a daily basis | 2.07 | % |  | 1.48 | % |  |  | 0.68 | %
Average interest rates, computed at December 31 | 2.07 | % |  | 1.48 | % |  |  | N/A |
ACE |  |  |  |  |  |
| 2018 |  | 2017 |  |  | 2016
Average borrowings | $ | 95 |  |  | $ | 30 |  |  |  | $ | — |
Maximum borrowings outstanding | 210 |  |  | 133 |  |  |  | 5 |
Average interest rates, computed on a daily basis | 2.21 | % |  | 1.43 | % |  |  | 0.65 | %
Average interest rates, computed at December 31 | 2.21 | % |  | 1.43 | % |  |  | N/A |
Schedule of Line of Credit Facilities | At December 31, 2018, the Registrants had the following aggregate bank commitments, credit facility borrowings and available capacity under their respective credit facilities:
|  |  |  |  |  |  |  |  | Available Capacity at December 31, 2018
Borrower | Facility Type |  | Aggregate Bank Commitment(a) |  | Facility Draws |  | Outstanding Letters of Credit |  | Actual |  | To Support Additional Commercial Paper(b)
Exelon Corporate | Syndicated Revolver |  | $ | 600 |  |  | $ | — |  |  | $ | 9 |  |  | $ | 591 |  |  | $ | 591 |
Generation | Syndicated Revolver |  | 5,300 |  |  | — |  |  | 1,203 |  |  | 4,097 |  |  | 4,097 |
Generation | Bilaterals |  | 545 |  |  | — |  |  | 353 |  |  | 192 |  |  | — |
Generation | Project Finance |  | 159 |  |  | — |  |  | 119 |  |  | 40 |  |  | — |
ComEd | Syndicated Revolver |  | 1,000 |  |  | — |  |  | 2 |  |  | 998 |  |  | 998 |
PECO | Syndicated Revolver |  | 600 |  |  | — |  |  | — |  |  | 600 |  |  | 600 |
BGE | Syndicated Revolver |  | 600 |  |  | — |  |  | 1 |  |  | 599 |  |  | 564 |
Pepco | Syndicated Revolver |  | 300 |  |  | — |  |  | 8 |  |  | 292 |  |  | 252 |
DPL | Syndicated Revolver |  | 300 |  |  | — |  |  | 1 |  |  | 299 |  |  | 299 |
ACE | Syndicated Revolver |  | 300 |  |  | — |  |  | — |  |  | 300 |  |  | 286 |
Total |  |  | $ | 9,704 |  |  | $ | — |  |  | $ | 1,696 |  |  | $ | 8,008 |  |  | $ | 7,687 |
__________
(a) | Excludes $135 million of credit facility agreements arranged at minority and community banks at Generation, ComEd, PECO, BGE, Pepco, DPL and ACE with aggregate commitments of $49 million, $33 million, $34 million, $5 million, $5 million, $5 million and $5 million, respectively. These facilities expire on October 11, 2019. These facilities are solely utilized to issue letters of credit. As of December 31, 2018, letters of credit issued under these facilities totaled $5 million and $2 million for Generation and BGE, respectively.
Schedule Of Credit Agreement Covenants | The following table summarizes the minimum thresholds reflected in the credit agreements for the year ended December 31, 2018:
| Exelon |  | Generation |  | ComEd |  | PECO |  | BGE |  | Pepco |  | DPL |  | ACE
Credit agreement threshold | 2.50 to 1 |  | 3.00 to 1 |  | 2.00 to 1 |  | 2.00 to 1 |  | 2.00 to 1 |  | 2.00 to 1 |  | 2.00 to 1 |  | 2.00 to 1
At December 31, 2018, the interest coverage ratios at the Registrants were as follows:
| Exelon |  | Generation |  | ComEd |  | PECO |  | BGE |  | Pepco |  | DPL |  | ACE
Interest coverage ratio | 7.34 |  | 10.99 |  | 7.34 |  | 8.14 |  | 9.77 |  | 5.98 |  | 7.03 |  | 5.06
Schedule of Long-term Debt Instruments |
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 1.70 | % | - | 5.95 | % |  | 2021 - 2048 |  | $ | 3,075 |  |  | $ | 2,925 |
Loan Agreement |  |  | 2.00 | % |  | 2023 |  | 50 |  |  | 0 |
Total long-term debt |  |  |  |  |  |  | 3,125 |  |  | 2,925 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | (18 | ) |  | (5 | )
Unamortized debt issuance costs |  |  |  |  |  |  | (23 | ) |  | (17 | )
Long-term debt due within one year |  |  |  |  |  |  | — |  |  | (500 | )
Long-term debt |  |  |  |  |  |  | $ | 3,084 |  |  | $ | 2,403 |
Long-term debt to financing trusts(b) |  |  |  |  |  |  |  |  |
Subordinated debentures to PECO Trust III | 7.38 | % | - | 7.50 | % |  | 2028 |  | $ | 81 |  |  | $ | 81 |
Subordinated debentures to PECO Trust IV |  |  | 5.75 | % |  | 2033 |  | 103 |  |  | 103 |
Long-term debt to financing trusts |  |  |  |  |  |  | $ | 184 |  |  | $ | 184 |
__________
(a) | Substantially all of PECO’s assets are subject to the lien of its mortgage indenture.
(b) | Amounts owed to this financing trust are recorded as Long-term debt to financing trusts within PECO’s Consolidated Balance Sheets.
BGE
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 3.38 | % | - | 6.80 | % |  | 2021 - 2036 |  | $ | 1,137 |  |  | $ | 1,037 |
Transition bonds(b) |  |  | 5.55 | % |  | 2023 |  | 59 |  |  | 90 |
Total long-term debt |  |  |  |  |  |  | 1,196 |  |  | 1,127 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | (1 | ) |  | (1 | )
Unamortized debt issuance costs |  |  |  |  |  |  | (7 | ) |  | (5 | )
Long-term debt due within one year |  |  |  |  |  |  | (18 | ) |  | (281 | )
Long-term debt |  |  |  |  |  |  | $ | 1,170 |  |  | $ | 840 |
__________
(a) | Substantially all of ACE's assets are subject to the lien of its respective mortgage indenture.
(b) | Maturities of ACE's Transition Bonds outstanding at December 31, 2018 are $18 million in 2019, $20 million in 2020 and $21 million in 2021.
Lo
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 1.81 | % | - | 7.90 | % |  | 2021 - 2048 |  | $ | 5,242 |  |  | $ | 4,743 |
Senior unsecured notes |  |  | 7.45 | % |  | 2032 |  | 185 |  |  | 185 |
Unsecured Tax-Exempt Bonds | 1.74 | % | - | 5.40 | % |  | 2024 - 2031 |  | 112 |  |  | 112 |
Medium-terms notes (unsecured) | 7.61 | % | - | 7.72 | % |  | 2019 - 2027 |  | 22 |  |  | 26 |
Transition bonds(b) |  |  |  | 5.55 | % |  | 2023 |  | 59 |  |  | 90 |
Notes payable and other (c) | 7.28 | % | - | 8.88 | % |  | 2019 - 2022 |  | 16 |  |  | 33 |
Total long-term debt |  |  |  |  |  |  | 5,636 |  |  | 5,189 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | 4 |  |  | 5 |
Unamortized debt issuance costs |  |  |  |  |  |  | (14 | ) |  | (6 | )
Fair value adjustment |  |  |  |  |  |  | 633 |  |  | 686 |
Long-term debt due within one year |  |  |  |  |  |  | (125 | ) |  | (396 | )
Long-term debt |  |  |  |  |  |  | $ | 6,134 |  |  | $ | 5,478 |
__________
(a) | Substantially all of Pepco's, DPL's, and ACE's assets are subject to the lien of its respective mortgage indenture.
(b) | Transition bonds are recorded as part of Long-term debt within ACE's Consolidated Balance Sheets.
(c) | Includes Pepco's capital lease obligations of $14 million and $27 million at December 31, 2018 and 2017, respectively.
The following tables present the outstanding long-term debt at the Registrants as of December 31, 2018 and 2017: Exelon
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 1.70 | % | - | 7.90 | % |  | 2019 - 2048 |  | 16,496 |  |  | 15,197 |
Senior unsecured notes | 2.45 | % | - | 7.60 | % |  | 2019 - 2046 |  | 11,285 |  |  | 11,285 |
Unsecured notes | 2.40 | % | - | 6.35 | % |  | 2021 - 2048 |  | 2,900 |  |  | 2,600 |
Pollution control notes | 2.50 | % | - | 2.70 | % |  | 2025 - 2036 |  | 435 |  |  | 435 |
Nuclear fuel procurement contracts |  |  | 3.15 | % |  | 2020 |  | 39 |  |  | 82 |
Notes payable and other(b)(c) | 2.85 | % | - | 8.88 | % |  | 2019 - 2053 |  | 188 |  |  | 405 |
Junior subordinated notes |  |  | 3.50 | % |  | 2022 |  | 1,150 |  |  | 1,150 |
Long-term software licensing agreement |  |  | 3.95 | % |  | 2024 |  | 73 |  |  | 79 |
Unsecured Tax-Exempt Bonds | 1.74 | % | - | 5.40 | % | — |  | 2024 - 2031 |  | 112 |  |  | 112 |
Medium-Terms Notes (unsecured) | 7.61 | % | - | 7.72 | % |  | 2019 - 2027 |  | 22 |  |  | 26 |
Transition bonds |  |  | 5.55 | % |  | 2023 |  | 59 |  |  | 90 |
Loan Agreement |  |  | 2.00 | % |  | 2023 |  | 50 |  |  | — |
Nonrecourse debt: |  |  |  |  |  |  |  |  |
Fixed rates | 2.29 | % | - | 6.00 | % |  | 2031 - 2037 |  | 1,253 |  |  | 1,331 |
Variable rates(f) |  |  |  | 5.81 | % |  | 2019 - 2024 |  | 849 |  |  | 865 |
Total long-term debt |  |  |  |  |  |  | 34,911 |  |  | 33,657 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | (66 | ) |  | (57 | )
Unamortized debt issuance costs |  |  |  |  |  |  | (216 | ) |  | (201 | )
Fair value adjustment |  |  |  |  |  |  | 795 |  |  | 865 |
Long-term debt due within one year(e) |  |  |  |  |  |  | (1,349 | ) |  | (2,088 | )
Long-term debt |  |  |  |  |  |  | $ | 34,075 |  |  | $ | 32,176 |
Long-term debt to financing trusts(d) |  |  |  |  |  |  |  |  |
Subordinated debentures to ComEd Financing III |  |  | 6.35 | % |  | 2033 |  | $ | 206 |  |  | $ | 206 |
Subordinated debentures to PECO Trust III | 7.38 | % | - | 7.50 | % |  | 2028 |  | 81 |  |  | 81 |
Subordinated debentures to PECO Trust IV |  |  | 5.75 | % |  | 2033 |  | 103 |  |  | 103 |
Total long-term debt to financing trusts |  |  |  |  |  |  | 390 |  |  | 390 |
Unamortized debt issuance costs |  |  |  |  |  |  | — |  |  | (1 | )
Long-term debt to financing trusts |  |  |  |  |  |  | $ | 390 |  |  | $ | 389 |
__________
(a) | Substantially all of ComEd’s assets other than expressly excepted property and substantially all of PECO’s, Pepco's, DPL's and ACE's assets are subject to the liens of their respective mortgage indentures.
(b) | Includes capital lease obligations of $36 million and $53 million at December 31, 2018 and 2017, respectively. Lease payments of $21 million, $5 million, $1 million, $1 million, less than $1 million, and $8 million will be made in 2019, 2020, 2021, 2022, 2023, and thereafter, respectively.
(c) | Includes financing related to Albany Green Energy, LLC (AGE). During the third quarter of 2017, Generation retired $228 million of its outstanding debt balance.
(d) | Amounts owed to these financing trusts are recorded as Long-term debt to financing trusts within Exelon’s Consolidated Balance Sheets.
(e) | In January 2019, $300 million of ComEd long-term debt due within one year was paid in full.
(f) | Excludes interest on CEU Upstream nonrecourse debt, see discussion below.
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
Unsecured notes | 2.40 | % | - | 6.35 | % |  | 2021 - 2048 |  | 2,900 |  |  | 2,600 |
Total long-term debt |  |  |  |  |  |  | 2,900 |  |  | 2,600 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | (6 | ) |  | (6 | )
Unamortized debt issuance costs |  |  |  |  |  |  | (18 | ) |  | (17 | )
Long-term debt |  |  |  |  |  |  | $ | 2,876 |  |  | $ | 2,577 |
PHI d
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 2.15 | % | - | 6.45 | % |  | 2019 - 2048 |  | $ | 8,179 |  |  | $ | 7,529 |
Notes payable and other(b) |  |  |  | 7.49 | % |  | 2053 |  | 8 |  |  | 147 |
Total long-term debt |  |  |  |  |  |  | 8,187 |  |  | 7,676 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | (23 | ) |  | (23 | )
Unamortized debt issuance costs |  |  |  |  |  |  | (63 | ) |  | (52 | )
Long-term debt due within one year(d) |  |  |  |  |  |  | (300 | ) |  | (840 | )
Long-term debt |  |  |  |  |  |  | $ | 7,801 |  |  | $ | 6,761 |
Long-term debt to financing trust(c) |  |  |  |  |  |  |  |  |
Subordinated debentures to ComEd Financing III |  |  | 6.35 | % |  | 2033 |  | $ | 206 |  |  | $ | 206 |
Total long-term debt to financing trusts |  |  |  |  |  |  | 206 |  |  | 206 |
Unamortized debt issuance costs |  |  |  |  |  |  | (1 | ) |  | (1 | )
Long-term debt to financing trusts |  |  |  |  |  |  | $ | 205 |  |  | $ | 205 |
__________
(a) | Substantially all of ComEd’s assets, other than expressly excepted property, are subject to the lien of its mortgage indenture.
(b) | Includes ComEd’s capital lease obligations of $8 million at both December 31, 2018 and 2017, respectively. Lease payments of less than $1 million annually will be made from 2019 through expiration at 2053.
(c) | Amount owed to this financing trust is recorded as Long-term debt to financing trust within ComEd’s Consolidated Balance Sheets.
(d)
ration
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
Senior unsecured notes | 2.95 | % | - | 7.60 | % |  | 2019 - 2042 |  | $ | 6,019 |  |  | $ | 6,019 |
Pollution control notes | 2.50 | % | - | 2.70 | % |  | 2025 - 2036 |  | 435 |  |  | 435 |
Nuclear fuel procurement contracts |  |  | 3.15 | % |  | 2020 |  | 39 |  |  | 82 |
Notes payable and other(a)(b) | 2.85 | % | - | 7.83 | % |  | 2019 - 2024 |  | 164 |  |  | 223 |
Nonrecourse debt: |  |  |  |  |  |  |  |  |
Fixed rates | 2.29 | % | - | 6.00 | % |  | 2031 - 2037 |  | 1,253 |  |  | 1,331 |
Variable rates(c) |  |  | 5.81 | % |  | 2019 - 2024 |  | 849 |  |  | 865 |
Total long-term debt |  |  |  |  |  |  | 8,759 |  |  | 8,955 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | (6 | ) |  | (8 | )
Unamortized debt issuance costs |  |  |  |  |  |  | (51 | ) |  | (60 | )
Fair value adjustment |  |  |  |  |  |  | 91 |  |  | 103 |
Long-term debt due within one year |  |  |  |  |  |  | (906 | ) |  | (346 | )
Long-term debt |  |  |  |  |  |  | $ | 7,887 |  |  | $ | 8,644 |
__________
(a) | Includes Generation’s capital lease obligations of $14 million and $18 million at December 31, 2018 and 2017, respectively. Generation will make lease payments of $7 million, $5 million, $1 million, and $1 million in 2019, 2020, 2021, and 2022, respectively. Lease payments of less than $1 million annually will be made from 2023 through expiration of the final capital lease in 2024.
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 1.81 | % | - | 4.27 | % |  | 2023 - 2048 |  | $ | 1,370 |  |  | $ | 1,171 |
Unsecured Tax-Exempt Bonds | 1.74 | % | - | 5.40 | % |  | 2024 - 2031 |  | 112 |  |  | 112 |
Medium-terms notes (unsecured) | 7.61 | % | - | 7.72 | % |  | 2019 - 2027 |  | 22 |  |  | 26 |
Total long-term debt |  |  |  |  |  |  | 1,504 |  |  | 1,309 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | 2 |  |  | 2 |
Unamortized debt issuance costs |  |  |  |  |  |  | (12 | ) |  | (11 | )
Long-term debt due within one year |  |  |  |  |  |  | (91 | ) |  | (83 | )
Long-term debt |  |  |  |  |  |  | $ | 1,403 |  |  | $ | 1,217 |
___ o
|  |  |  |  | Maturity Date |  | December 31,
| Rates |  | 2018 |  | 2017
Long-term debt |  |  |  |  |  |  |  |  |
First mortgage bonds(a) | 3.05 | % | - | 7.90 | % |  | 2022 - 2048 |  | $ | 2,735 |  |  | $ | 2,535 |
Notes payable and other(b) | 7.28 | % | - | 8.88 | % |  | 2019 - 2022 |  | 16 |  |  | 35 |
Total long-term debt |  |  |  |  |  |  | 2,751 |  |  | 2,570 |
Unamortized debt discount and premium, net |  |  |  |  |  |  | 2 |  |  | 2 |
Unamortized debt issuance costs |  |  |  |  |  |  | (34 | ) |  | (32 | )
Long-term debt due within one year |  |  |  |  |  |  | (15 | ) |  | (19 | )
Long-term debt |  |  |  |  |  |  | $ | 2,704 |  |  | $ | 2,521 |
___
Schedule of Maturities of Long-term Debt | -term debt maturities at Exelon, Generation, ComEd, PECO, BGE, PHI, Pepco, DPL and ACE in the periods 2019 through 2023 and thereafter are as follows:
Year | Exelon |  | Generation |  | ComEd |  | PECO |  | BGE |  | PHI |  | Pepco |  | DPL |  | ACE
2019 | $ | 1,349 |  |  | $ | 906 |  |  | $ | 300 |  |  | $ | — |  |  | $ | — |  |  | $ | 125 |  |  | $ | 15 |  |  | $ | 91 |  |  | $ | 18 |
2020 | 3,528 |  |  | 2,108 |  |  | 500 |  |  | — |  |  | — |  |  | 20 |  |  | — |  |  | — |  |  | 20 |
2021 | 1,511 |  |  | 1 |  |  | 350 |  |  | 300 |  |  | 300 |  |  | 261 |  |  | 1 |  |  | — |  |  | 260 |
2022 | 3,084 |  |  | 1,024 |  |  | — |  |  | 350 |  |  | 250 |  |  | 310 |  |  | 310 |  |  | — |  |  | — |
2023 | 850 |  |  | — |  |  | — |  |  | 50 |  |  | 300 |  |  | 500 |  |  | — |  |  | 500 |  |  | — |
Thereafter | 24,979 |  | (a) | 4,720 |  |  | 7,243 |  | (b) | 2,609 |  | (c) | 2,050 |  |  | 4,420 |  |  | 2,425 |  |  | 913 |  |  | 898 |
Total | $ | 35,301 |  |  | $ | 8,759 |  |  | $ | 8,393 |  |  | $ | 3,309 |  |  | $ | 2,900 |  |  | $ | 5,636 |  |  | $ | 2,751 |  |  | $ | 1,504 |  |  | $ | 1,196 |
__________
(a) | Includes $390 million due to ComEd and PECO financing trusts.
(b) | Includes $206 million due to ComEd financing trust.
(c) | Includes $184 million due to PECO financing trusts.
Jun

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