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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Risk management assets/liabilities - January 1 |  |  | $ (352,315) |
Retirement and other postretirement benefit plan obligations - January 1 |  |  | (107,659) |
Risk-management assets/liabilities of unconsolidated affiliates - January 1 |  |  | (11,377) |
Accumulated other comprehensive loss - January 1 |  |  | (471,351) |
Other comprehensive income (loss) before reclassification, risk-management assets/liabilities | $ 22,226 | $ (173,054) | (49,542) | $ (140,056)
Other comprehensive income (loss) before reclassification, retirement and postretirement benefit plan obligations |  |  | 149 |
Other comprehensive income (loss) before reclassification, risk-management assets/liabilities of unconsolidated affiliates |  |  | 10,956 |
Other comprehensive income (loss) before reclassifications |  |  | (38,437) |
Other comprehensive income reclassification adjustment from AOCI for risk-management assets/liabilities, net of tax | 70,426 | 35,204 | 136,458 | 76,591
Other comprehensive income, retirement and other postretirement benefit plans, reclassification adjustment from AOCI, net of tax |  |  | 5,803 |
Other comprehensive income, reclassification adjustment from AOCI for other comprehensive income attributable to unconsolidated affiliates, net of tax |  |  | 772 |
Other comprehensive income, reclassification adjustment included in net income, net of tax |  |  | 143,033 |
Other comprehensive income (loss), risk-management assets/liabilities, after reclassification adjustment, net of tax |  |  | 86,916 |
Other comprehensive (income) loss, retirement and other postretirement benefit plans, after reclassification adjustment, net of tax | 2,922 | $ 5,247 | 5,952 | $ 8,885
Other comprehensive income (loss), risk-management assets/liabilities of unconsolidated affiliates, net of tax |  |  | 11,728 |
Other comprehensive income (loss), net of tax |  |  | 104,596 |
Risk management assets/liabilities - June 30 | (265,399) |  | (265,399) |
Retirement and other postretirement benefit plan obligations - June 30 | (101,707) |  | (101,707) |
Risk-management assets/liabilities of unconsolidated affiliates - June 30 | 351 |  | 351 |
Accumulated other comprehensive loss - June 30 | (366,755) |  | (366,755) |
Cash Flow Hedging [Member] | Commodity Contracts |  |  |  |
Unrealized gain loss on cash flow hedges net of tax accumulated other comprehensive income (loss) | (115,725) |  | (115,725) |
Price risk cash flow hedge unrealized gain (loss) to be reclassified during next 12 months | (104,100) |  | (104,100) |
Cash Flow Hedging [Member] | Interest Rate Contracts |  |  |  |
Amount of accumulated other comprehensive income (loss) attributable primarily to settled interest-rate swaps | (148,726) |  | (148,726) |
Amount of accumulated other comprehensive income (loss) attributable primarily to forward starting interest-rate swaps | (948) |  | (948) |
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net | $ (21,700) |  | $ (21,700) |

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