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Quarterly Data (Unaudited) (All Registrants) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Data [Abstract] |
Quarterly Data (Unaudited) (All Registrants) | Quarterly Data (Unaudited) (All Registrants) Exelon 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 |
Generation 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 |
ComEd 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 |
PECO 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 |
BGE 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 |
PHI 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 |
Pepco 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 |
DPL 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 |
ACE 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 | ) |  | — |

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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Period Type: | duration