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Pension Benefits - Total Periodic Benefit Costs (Details) - Pension Benefits - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost – including administrative expenses | $ 62 | $ 72 | $ 187 | $ 218
Interest cost on projected benefit obligation | 150 | 140 | 451 | 420
Expected return on plan assets | (247) | (258) | (741) | (775)
Recognition of net actuarial loss | 130 | 172 | 389 | 516
Recognition of prior service cost/(credit) | (4) | (4) | (13) | (13)
TOTAL PERIODIC BENEFIT COST | 91 | 122 | 273 | 366
Cost capitalized | (26) | (32) | (80) | (94)
Reconciliation to rate level | (5) | (22) | (12) | (68)
Total expense/(credit) recognized | 60 | 68 | 181 | 204
CECONY |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost – including administrative expenses | 58 | 68 | 175 | 204
Interest cost on projected benefit obligation | 141 | 131 | 423 | 394
Expected return on plan assets | (234) | (245) | (702) | (734)
Recognition of net actuarial loss | 123 | 163 | 369 | 488
Recognition of prior service cost/(credit) | (5) | (5) | (15) | (15)
TOTAL PERIODIC BENEFIT COST | 83 | 112 | 250 | 337
Cost capitalized | (24) | (30) | (76) | (89)
Reconciliation to rate level | (4) | (24) | (10) | (74)
Total expense/(credit) recognized | $ 55 | $ 58 | $ 164 | $ 174

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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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