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v3.23.1

Accounting for Derivative Instruments and Hedging Activities - Net Notional Volume Buy/Sell of Open Derivative Transactions (Details) - Long certificate in Millions, bbl in Millions, T in Millions, MWh in Millions, MMBTU in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
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Mar. 31, 2023 USD ($) MMBTU MWh certificate T bbl | Dec. 31, 2022 USD ($) MMBTU MWh certificate T bbl
Emissions |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, nonmonetary notional amount, mass (ton) | T | 0 | 1
Renewable Energy Certificates |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, non-monetary notional amount (in shares) | certificate | 13 | 15
Coal |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, nonmonetary notional amount, mass (ton) | T | 14 | 11
Natural Gas |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, nonmonetary notional amount, energy measure (MMBtu/MW/Day) | MMBTU | 667 | 422
Oil |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, nonmonetary notional amount (in barrels) | bbl | 0 | 1
Power |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, nonmonetary notional amount, energy measure (MMBtu/MW/Day) | MWh | 198 | 192
Consumer Financing Program |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, notional amount | $ 863 | $ 0
Foreign Exchange |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, notional amount | 594 | 569
Interest |  |
Volumetric Underlying Derivative Transactions |  |
Derivative, notional amount | $ 1,720 | $ 0

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