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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables) | 9 Months Ended
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Sep. 30, 2021
Accumulated Other Comprehensive Loss | The following table sets forth the balance in accumulated other comprehensive loss for the period indicated:
|  | Risk- Management Assets/Liabilities (a) |  | Retirement and Other Postretirement Benefit Plan Obligations (a) (b) |  | Risk- Management Assets/Liabilities of Unconsolidated Affiliates (a) |  | Accumulated Other Comprehensive Loss (a)
|  | (Thousands of dollars)
January 1, 2021 |  | $ | (377,446) |  |  | $ | (157,635) |  |  | $ | (16,368) |  |  | $ | (551,449) |
Other comprehensive income (loss) before reclassifications |  | (271,622) |  |  | (118) |  |  | 3,350 |  |  | (268,390) |
Amounts reclassified to net income (c) |  | 143,029 |  |  | 13,541 |  |  | 1,433 |  |  | 158,003 |
Other comprehensive income (loss) |  | (128,593) |  |  | 13,423 |  |  | 4,783 |  |  | (110,387) |
September 30, 2021 |  | $ | (506,039) |  |  | $ | (144,212) |  |  | $ | (11,585) |  |  | $ | (661,836) |
(a) - All amounts are presented net of tax. (b) - Includes amounts related to supplemental executive retirement plan. (c) - See Note C for details of amounts reclassified to net income for risk-management assets/liabilities and Note H for retirement and other postretirement benefit plan obligations.
Schedule of Accumulated Other Comprehensive Loss for Risk-Management Assets/Liabilities [Table Text Block] | The following table sets forth information about the balance of accumulated other comprehensive loss at September 30, 2021, representing unrealized losses related to risk-management assets and liabilities:
|  | Risk- Management Assets/Liabilities (a)
|  | (Thousands of dollars)
Commodity derivative instruments expected to be realized within the next 27 months (b) |  | $ | (223,117) |
Settled interest-rate swaps to be recognized over the life of the long-term, fixed-rate debt (c) |  | (170,817) |
Interest-rate swaps with future settlement dates expected to be amortized over the life of long-term debt |  | (112,105) |
Accumulated other comprehensive loss at September 30, 2021 |  | $ | (506,039) |
(a) - All amounts are presented net of tax. (b) - Based on commodity prices on September 30, 2021, we expect $206.4 million in net losses, net of tax, over the next 12 months. (c) - We expect net losses of $30.1 million, net of tax, will be reclassified into earnings during the next 12 months.

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