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Fair Value Measurements, Recurring (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Total gross fair value, assets | $ 1,972 | $ 616
Effect of counterparty netting | (1,811) | (444)
Effect of cash collateral netting | 0 | (15)
Net carrying value on Balance Sheet, assets | 161 | 157
Liabilities |  |
Blending program obligations | 18 | 57
Total gross fair value, liabilities | 2,450 | 544
Effect of counterparty netting | (1,811) | (444)
Effect of cash collateral netting | (612) | (28)
Net carrying value on Balance Sheet, liabilities | 27 | 72
Assets Held in Trust [Member] |  |
Assets |  |
Investments of certain benefit plans | 85 | 89
Commodity Contracts [Member] |  |
Assets |  |
Derivative contracts | 1,815 | 522
Effect of counterparty netting | (1,811) | (444)
Effect of cash collateral netting | 0 | (15)
Derivative contracts, net assets | 4 | 63
Cash collateral received not offset | 0 | 0
Liabilities |  |
Derivative contracts | 2,423 | 472
Effect of counterparty netting | (1,811) | (444)
Effect of cash collateral netting | (612) | (28)
Derivative contracts, net liabilities | 0 | 0
Cash collateral paid not offset | (194) | (41)
Physical Purchase Contracts [Member] |  |
Assets |  |
Derivative contracts | 24 | 4
Derivative contracts, net assets | 24 | 4
Liabilities |  |
Derivative contracts | 2 | 5
Derivative contracts, net liabilities | 2 | 5
Foreign Currency Contracts [Member] |  |
Assets |  |
Derivative contracts | 48 | 1
Derivative contracts, net assets | 48 | 1
Liabilities |  |
Derivative contracts | 7 | 10
Derivative contracts, net liabilities | 7 | 10
Fair Value, Inputs, Level 1 [Member] |  |
Assets |  |
Total gross fair value, assets | 1,942 | 606
Liabilities |  |
Blending program obligations | 0 | 0
Total gross fair value, liabilities | 2,430 | 482
Fair Value, Inputs, Level 1 [Member] | Assets Held in Trust [Member] |  |
Assets |  |
Investments of certain benefit plans | 79 | 83
Fair Value, Inputs, Level 1 [Member] | Commodity Contracts [Member] |  |
Assets |  |
Derivative contracts | 1,815 | 522
Liabilities |  |
Derivative contracts | 2,423 | 472
Fair Value, Inputs, Level 1 [Member] | Physical Purchase Contracts [Member] |  |
Assets |  |
Derivative contracts | 0 | 0
Liabilities |  |
Derivative contracts | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Foreign Currency Contracts [Member] |  |
Assets |  |
Derivative contracts | 48 | 1
Liabilities |  |
Derivative contracts | 7 | 10
Fair Value, Inputs, Level 2 [Member] |  |
Assets |  |
Total gross fair value, assets | 24 | 4
Liabilities |  |
Blending program obligations | 18 | 57
Total gross fair value, liabilities | 20 | 62
Fair Value, Inputs, Level 2 [Member] | Assets Held in Trust [Member] |  |
Assets |  |
Investments of certain benefit plans | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Commodity Contracts [Member] |  |
Assets |  |
Derivative contracts | 0 | 0
Liabilities |  |
Derivative contracts | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Physical Purchase Contracts [Member] |  |
Assets |  |
Derivative contracts | 24 | 4
Liabilities |  |
Derivative contracts | 2 | 5
Fair Value, Inputs, Level 2 [Member] | Foreign Currency Contracts [Member] |  |
Assets |  |
Derivative contracts | 0 | 0
Liabilities |  |
Derivative contracts | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |
Assets |  |
Total gross fair value, assets | 6 | 6
Liabilities |  |
Blending program obligations | 0 | 0
Total gross fair value, liabilities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Assets Held in Trust [Member] |  |
Assets |  |
Investments of certain benefit plans | 6 | 6
Fair Value, Inputs, Level 3 [Member] | Commodity Contracts [Member] |  |
Assets |  |
Derivative contracts | 0 | 0
Liabilities |  |
Derivative contracts | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Physical Purchase Contracts [Member] |  |
Assets |  |
Derivative contracts | 0 | 0
Liabilities |  |
Derivative contracts | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Foreign Currency Contracts [Member] |  |
Assets |  |
Derivative contracts | 0 | 0
Liabilities |  |
Derivative contracts | $ 0 | $ 0

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