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Quarterly Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Data [Abstract] |
Quarterly Financial Information | The data shown below includes all adjustments that BGE considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 977 |  |  | $ | 951 |  |  | $ | 177 |  |  | $ | 228 |  |  | $ | 128 |  |  | $ | 125 |
June 30 | 662 |  |  | 674 |  |  | 85 |  |  | 98 |  |  | 51 |  |  | 45 |
September 30 | 731 |  |  | 738 |  |  | 103 |  |  | 124 |  |  | 63 |  |  | 62 |
December 31 | 799 |  |  | 813 |  |  | 109 |  |  | 163 |  |  | 71 |  |  | 76 |
The data shown below includes all adjustments that ACE considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income (Loss)
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 310 |  |  | $ | 275 |  |  | $ | 23 |  |  | $ | 25 |  |  | $ | 7 |  |  | $ | 28 |
June 30 | 265 |  |  | 270 |  |  | 25 |  |  | 25 |  |  | 8 |  |  | 8 |
September 30 | 406 |  |  | 370 |  |  | 84 |  |  | 79 |  |  | 61 |  |  | 41 |
December 31 | 254 |  |  | 271 |  |  | 14 |  |  | 28 |  |  | (1 | ) |  | — |
The data shown below includes all adjustments that PHI considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income Attributable to Membership Interest
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 1,251 |  |  | $ | 1,175 |  |  | $ | 126 |  |  | $ | 180 |  |  | $ | 65 |  |  | $ | 140 |
June 30 | 1,076 |  |  | 1,074 |  |  | 153 |  |  | 148 |  |  | 84 |  |  | 66 |
September 30 | 1,361 |  |  | 1,310 |  |  | 245 |  |  | 285 |  |  | 187 |  |  | 153 |
December 31 | 1,117 |  |  | 1,121 |  |  | 126 |  |  | 159 |  |  | 62 |  |  | 4 |
The data shown below includes all adjustments that DPL considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 384 |  |  | $ | 362 |  |  | $ | 49 |  |  | $ | 78 |  |  | $ | 31 |  |  | $ | 57 |
June 30 | 289 |  |  | 282 |  |  | 42 |  |  | 41 |  |  | 26 |  |  | 19 |
September 30 | 328 |  |  | 327 |  |  | 51 |  |  | 59 |  |  | 33 |  |  | 31 |
December 31 | 331 |  |  | 330 |  |  | 48 |  |  | 52 |  |  | 30 |  |  | 14 |
The data shown below includes all adjustments that ComEd considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 1,512 |  |  | $ | 1,298 |  |  | $ | 292 |  |  | $ | 314 |  |  | $ | 165 |  |  | $ | 141 |
June 30 | 1,398 |  |  | 1,357 |  |  | 288 |  |  | 319 |  |  | 164 |  |  | 118 |
September 30 | 1,598 |  |  | 1,571 |  |  | 323 |  |  | 404 |  |  | 193 |  |  | 189 |
December 31 | 1,373 |  |  | 1,309 |  |  | 242 |  |  | 286 |  |  | 141 |  |  | 120 |
The data shown below includes all adjustments that Pepco considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 557 |  |  | $ | 530 |  |  | $ | 56 |  |  | $ | 79 |  |  | $ | 31 |  |  | $ | 58 |
June 30 | 523 |  |  | 514 |  |  | 85 |  |  | 84 |  |  | 54 |  |  | 43 |
September 30 | 628 |  |  | 604 |  |  | 112 |  |  | 149 |  |  | 89 |  |  | 87 |
December 31 | 531 |  |  | 510 |  |  | 65 |  |  | 87 |  |  | 36 |  |  | 17 |
The data shown below, which may not equal the total for the year due to the effects of rounding and dilution, includes all adjustments that Exelon considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income Attributable to Common Shareholders
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 9,693 |  |  | $ | 8,747 |  |  | $ | 1,101 |  |  | $ | 1,308 |  |  | $ | 585 |  |  | $ | 990 |
June 30 | 8,076 |  |  | 7,665 |  |  | 942 |  |  | 300 |  |  | 539 |  |  | 95 |
September 30 | 9,403 |  |  | 8,768 |  |  | 1,146 |  |  | 1,499 |  |  | 733 |  |  | 823 |
December 31 | 8,814 |  |  | 8,384 |  |  | 708 |  |  | 1,288 |  |  | 152 |  |  | 1,880 |
| Net Income per Basic Share |  | Net Income per Diluted Share
| 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |
March 31 | $ | 0.61 |  |  | $ | 1.07 |  |  | $ | 0.60 |  |  | $ | 1.06 |
June 30 | 0.56 |  |  | 0.10 |  |  | 0.56 |  |  | 0.10 |
September 30 | 0.76 |  |  | 0.86 |  |  | 0.76 |  |  | 0.85 |
December 31 | 0.16 |  |  | 1.95 |  |  | 0.16 |  |  | 1.94 |
The data shown below includes all adjustments that PECO considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income |  | Net Income
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 866 |  |  | $ | 796 |  |  | $ | 142 |  |  | $ | 192 |  |  | $ | 113 |  |  | $ | 127 |
June 30 | 653 |  |  | 630 |  |  | 127 |  |  | 137 |  |  | 96 |  |  | 88 |
September 30 | 757 |  |  | 715 |  |  | 154 |  |  | 169 |  |  | 126 |  |  | 112 |
December 31 | 765 |  |  | 729 |  |  | 165 |  |  | 157 |  |  | 124 |  |  | 107 |
The data shown below includes all adjustments that Generation considers necessary for a fair presentation of such amounts:
| Operating Revenues |  | Operating Income (Loss) |  | Net Income (Loss) Attributable to Membership Interest
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Quarter ended: |  |  |  |  |  |  |  |  |  |  |
March 31 | $ | 5,512 |  |  | $ | 4,878 |  |  | $ | 347 |  |  | $ | 373 |  |  | $ | 136 |  |  | $ | 418 |
June 30 | 4,579 |  |  | 4,216 |  |  | 282 |  |  | (427 | ) |  | 178 |  |  | (235 | )
September 30 | 5,278 |  |  | 4,750 |  |  | 311 |  |  | 497 |  |  | 234 |  |  | 304 |
December 31 | 5,069 |  |  | 4,657 |  |  | 35 |  |  | 504 |  |  | (178 | ) |  | 2,224 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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