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Regulatory Assets and Liabilities (Tables)
9 Months Ended
Sep. 30, 2020
Regulated Operations [Abstract]  
Schedule of Delivery Rate Increases The below table provides a summary of the proposed delivery rate increases and delivery rate percentages, including rate levelization and excluding energy efficiency, which is a pass-through, for all four businesses:
Year 1Year 2Year 3
Rate IncreaseDelivery Rate %Rate IncreaseDelivery Rate %Rate IncreaseDelivery Rate %
Utility(Millions)Increase(Millions)Increase(Millions)Increase
NYSEG Electric$34.7 4.6 %$71.51 9.1 %$79.4 9.1 %
NYSEG Gas$— — %$1.58 0.8 %$3.3 1.6 %
RG&E Electric$10.7 2.4 %$22.92 5.2 %$25.4 5.2 %
RG&E Gas$— — %$— — %$2.4 1.3 %
Schedule of Current and Non-Current Regulatory Assets
Regulatory assets as of September 30, 2020 and December 31, 2019, respectively, consisted of:
September 30,December 31,
As of20202019
(Millions)
Pension and other post-retirement benefits cost deferrals$101 $125 
Pension and other post-retirement benefits963 1,061 
Storm costs418 272 
Rate adjustment mechanism 16 79 
Revenue decoupling mechanism56 19 
Transmission revenue reconciliation mechanism9 5 
Contracts for differences90 92 
Hardship programs26 29 
Plant decommissioning— 5 
Deferred purchased gas14 25 
Deferred transmission expense14 11 
Environmental remediation costs278 277 
Debt premium88 97 
Unamortized losses on reacquired debt27 29 
Unfunded future income taxes408 399 
Federal tax depreciation normalization adjustment149 153 
Asset retirement obligation21 17 
Deferred meter replacement costs25 27 
COVID-19 cost recovery2—
Other138 139 
Total regulatory assets2,843 2,861 
Less: current portion252 294 
Total non-current regulatory assets$2,591 $2,567 
Schedule of Current and Non-Current Regulatory Liabilities
Regulatory liabilities as of September 30, 2020 and December 31, 2019, respectively, consisted of:
September 30,December 31,
As of20202019
(Millions)
Energy efficiency portfolio standard$72 $72 
Gas supply charge and deferred natural gas cost4 11 
Pension and other post-retirement benefits cost deferrals69 80 
Carrying costs on deferred income tax bonus depreciation32 49 
Carrying costs on deferred income tax - Mixed Services 263(a)11 15 
2017 Tax Act1,550 1,548 
Revenue decoupling mechanism10 17 
Accrued removal obligations1,181 1,173 
Asset sale gain account10 10 
Economic development27 27 
Positive benefit adjustment35 37 
Theoretical reserve flow thru impact10 14 
Deferred property tax52 17 
Net plant reconciliation23 23 
Debt rate reconciliation83 67 
Rate refund – FERC ROE proceeding33 32 
Transmission congestion contracts24 23 
Merger-related rate credits14 16 
Accumulated deferred investment tax credits26 13 
Asset retirement obligation16 14 
Earning sharing provisions26 28 
Middletown/Norwalk local transmission network service collections18 18 
Low income programs29 33 
Non-firm margin sharing credits15 16 
New York 2018 winter storm settlement11 11 
Other175 159 
Total regulatory liabilities3,556 3,523 
Less: current portion214 242 
Total non-current regulatory liabilities$3,342 $3,281