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Pension Benefits - Total Periodic Benefit Costs (Details) - Pension Benefits - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost – including administrative expenses | $ 73 | $ 62 | $ 220 | $ 187
Interest cost on projected benefit obligation | 137 | 150 | 412 | 451
Expected return on plan assets | (258) | (247) | (775) | (741)
Recognition of net actuarial loss | 175 | 130 | 524 | 389
Recognition of prior service credit | (4) | (4) | (12) | (13)
TOTAL PERIODIC BENEFIT COST | 123 | 91 | 369 | 273
Cost capitalized | (34) | (26) | (98) | (80)
Reconciliation to rate level | (62) | (5) | (188) | (12)
Total credit recognized | 27 | 60 | 83 | 181
CECONY |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost – including administrative expenses | 69 | 58 | 206 | 175
Interest cost on projected benefit obligation | 129 | 141 | 387 | 423
Expected return on plan assets | (245) | (234) | (735) | (702)
Recognition of net actuarial loss | 165 | 123 | 496 | 369
Recognition of prior service credit | (5) | (5) | (15) | (15)
TOTAL PERIODIC BENEFIT COST | 113 | 83 | 339 | 250
Cost capitalized | (32) | (24) | (93) | (76)
Reconciliation to rate level | (59) | (4) | (179) | (10)
Total credit recognized | $ 22 | $ 55 | $ 67 | $ 164

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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