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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 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 before reclassification, risk-management assets/liabilities | $ 106,289 | $ (131,566) | 56,747 | $ (271,622)
Other comprehensive income before reclassification, retirement and postretirement benefit plan obligations |  |  | 170 |
Other comprehensive income before reclassification, risk-management assets/liabilities of unconsolidated affiliates |  |  | 14,958 |
Other comprehensive income before reclassifications |  |  | 71,875 |
Other comprehensive income reclassification adjustment from AOCI for risk-management assets/liabilities, net of tax | 53,953 | 66,438 | 190,411 | 143,029
Other comprehensive income, retirement and other postretirement benefit plans, reclassification adjustment from AOCI, net of tax |  |  | 8,704 |
Other comprehensive income, reclassification adjustment from AOCI for other comprehensive income attributable to unconsolidated affiliates, net of tax |  |  | 888 |
Other comprehensive income, reclassification adjustment included in net income, net of tax |  |  | 200,003 |
Other comprehensive income, risk-management assets/liabilities, after reclassification adjustment, net of tax |  |  | 247,158 |
Other comprehensive income, retirement and other postretirement benefit plans, after reclassification adjustment, net of tax | 2,922 | $ 4,538 | 8,874 | $ 13,423
Other comprehensive income, risk-management assets/liabilities of unconsolidated affiliates, net of tax |  |  | 15,846 |
Other comprehensive income, net of tax |  |  | 271,878 |
Risk management assets/liabilities - September 30 | (105,157) |  | (105,157) |
Retirement and other postretirement benefit plan obligations - September 30 | (98,785) |  | (98,785) |
Risk-management assets/liabilities of unconsolidated affiliates - September 30 | 4,469 |  | 4,469 |
Accumulated other comprehensive loss - September 30 | (199,473) |  | (199,473) |
Cash Flow Hedging [Member] | Commodity Contracts |  |  |  |
Unrealized gain loss on cash flow hedges net of tax accumulated other comprehensive income (loss) | (15,711) |  | (15,711) |
Price risk cash flow hedge unrealized gain (loss) to be reclassified during next 12 months | (14,700) |  | (14,700) |
Cash Flow Hedging [Member] | Interest Rate Contracts |  |  |  |
Amount of accumulated other comprehensive income (loss) attributable primarily to settled interest-rate swaps | (141,326) |  | (141,326) |
Amount of accumulated other comprehensive income (loss) attributable primarily to forward starting interest-rate swaps | 51,880 |  | 51,880 |
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net | $ (19,000) |  | $ (19,000) |

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