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Pension Benefits - Total Periodic Benefit Costs (Details) - Pension Benefits - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost – including administrative expenses | $ 73 | $ 62 | $ 147 | $ 125
Interest cost on projected benefit obligation | 137 | 150 | 275 | 301
Expected return on plan assets | (258) | (247) | (517) | (494)
Recognition of net actuarial loss | 175 | 130 | 349 | 259
Recognition of prior service credit | (4) | (4) | (8) | (9)
TOTAL PERIODIC BENEFIT COST | 123 | 91 | 246 | 182
Cost capitalized | (33) | (29) | (64) | (55)
Reconciliation to rate level | (62) | (2) | (126) | (7)
Total credit recognized | 28 | 60 | 56 | 120
CECONY |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost – including administrative expenses | 69 | 58 | 137 | 117
Interest cost on projected benefit obligation | 129 | 141 | 258 | 282
Expected return on plan assets | (245) | (234) | (490) | (468)
Recognition of net actuarial loss | 165 | 123 | 331 | 246
Recognition of prior service credit | (5) | (5) | (10) | (10)
TOTAL PERIODIC BENEFIT COST | 113 | 83 | 226 | 167
Cost capitalized | (32) | (27) | (61) | (52)
Reconciliation to rate level | (59) | (1) | (121) | (6)
Total credit recognized | $ 22 | $ 55 | $ 44 | $ 109

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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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