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v3.21.1

Accounting for Derivative Instruments and Hedging Activities - Offsetting of derivatives by counterparty master agreement level and collateral received (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
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Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Cash collateral received in support of energy risk management activities | $ (55) | $ (19)
Derivative liabilities | (2,440) | (884)
Cash Collateral Posted | 298 | 50
Gross Amounts of Recognized Assets / Liabilities | 384 |
Derivative Instruments | 0 |
Cash Collateral (Held) / Posted | (10) |
Net Amount | 374 |
Foreign exchange contract |  |
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Derivative liabilities | (2) |
Derivative Instruments | 0 |
Cash Collateral Posted | 0 |
Net Amount | (2) |
Gross Amounts of Recognized Assets / Liabilities | (2) |
Derivative Instruments | 0 |
Cash Collateral (Held) / Posted | 0 |
Net Amount | (2) |
Commodity contracts |  |
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid |  |
Derivative assets | 2,824 | 821
Derivative Instruments | (2,253) | (658)
Cash collateral received in support of energy risk management activities | (10) | (5)
Net Amount | 561 | 158
Derivative liabilities | (2,438) | (884)
Derivative Instruments | 2,253 | 658
Cash Collateral Posted | 0 | 0
Net Amount | (185) | (226)
Gross Amounts of Recognized Assets / Liabilities | 386 | (63)
Derivative Instruments | 0 | 0
Cash Collateral (Held) / Posted | (10) | (5)
Net Amount | $ 376 | $ (68)

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