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UNCONSOLIDATED AFFILIATES (Notes) | 12 Months Ended
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Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract] |
UNCONSOLIDATED AFFILIATES | UNCONSOLIDATED AFFILIATES Investments in Unconsolidated Affiliates - The following table sets forth our investments in unconsolidated affiliates for the periods indicated:
|  | Net Ownership Interest |  | December 31, 2020 |  | December 31, 2019
|  |  |  | (Thousands of dollars)
Northern Border Pipeline |  | 50% |  | $ | 291,987 |  |  | $ | 307,209 |
Overland Pass Pipeline |  | 50% |  | 409,573 |  |  | 417,473 |
Roadrunner |  | 50% |  | 66,794 |  |  | 80,816 |
Other (a) |  | Various |  | 36,678 |  |  | 56,346 |
Investments in unconsolidated affiliates (b) |  | $ | 805,032 |  |  | $ | 861,844 |
(a) - Year ended December 31, 2020, includes the impact of noncash impairment charges of $37.7 million related to the equity investments discussed below, offset partially by an acquisition of additional equity interest for $20.0 million. (b) - Equity-method goodwill (Note A) was $16.5 million and $38.8 million at December 31, 2020 and 2019, respectively. Equity in Net Earnings from Investments and Impairments - The following table sets forth our equity in net earnings (loss) from investments for the periods indicated:
|  | Years Ended December 31,
|  | 2020 |  | 2019 |  | 2018
|  | (Thousands of dollars)
Northern Border Pipeline |  | $ | 75,409 |  |  | $ | 68,871 |  |  | $ | 67,854 |
Overland Pass Pipeline |  | 38,618 |  |  | 63,698 |  |  | 65,887 |
Roadrunner |  | 29,017 |  |  | 26,839 |  |  | 22,993 |
Other |  | 197 |  |  | (4,867) |  |  | 1,649 |
Equity in net earnings from investments |  | $ | 143,241 |  |  | $ | 154,541 |  |  | $ | 158,383 |
Impairment of equity investments |  | $ | (37,730) |  |  | $ | — |  |  | $ | — |
Impairment Charges - In 2020, we incurred a noncash impairment charge of $30.5 million related to our 10.2% investment in Venice Energy Services Company in our Natural Gas Gathering and Processing segment, which includes $22.3 million related to equity-method goodwill, and a $7.2 million noncash impairment charge related to our 50% investment in Chisholm Pipeline Company in our Natural Gas Liquids segment. These impairment charges are included within impairment of equity investments in our Consolidated Statement of Income for the year ended December 31, 2020. For additional information on our impairment charges, see Note A. We incurred expenses in transactions with unconsolidated affiliates of $135.4 million, $164.7 million and $153.9 million for 2020, 2019 and 2018, respectively, primarily related to Overland Pass Pipeline and Northern Border Pipeline. Accounts payable to our equity-method investees at December 31, 2020 and 2019, were $8.4 million and $13.5 million, respectively. Northern Border Pipeline - The Northern Border Pipeline partnership agreement provides that distributions to Northern Border Pipeline’s partners are to be made on a pro rata basis according to each partner’s percentage interest. The Northern Border Pipeline Management Committee determines the amount and timing of such distributions. Any changes to, or suspension of, the cash distribution policy of Northern Border Pipeline requires the unanimous approval of the Northern Border Pipeline Management Committee. Cash distributions are equal to 100% of distributable cash flow as determined from Northern Border Pipeline’s financial statements based upon EBITDA less interest expense and maintenance capital expenditures. As determined by the Northern Border Pipeline Management Committee, we received an additional distribution of $50.0 million from Northern Border Pipeline during the year ended December 31, 2019. Loans or other advances from Northern Border Pipeline to its partners or affiliates are prohibited under its credit agreement. In 2020, 2019 and 2018, we made no contributions to Northern Border Pipeline. Northern Border Pipeline entered into a settlement with shippers that was approved by the FERC in February 2018. The settlement provides for tiered rate reductions beginning January 1, 2018, that reduced tariff rates 12.5% by January 2020, compared with previous tariff rates, and requires new rates to be established by January 2024. The impact of lower tariff rates on Northern Border Pipeline’s earnings and cash distributions was not material to us. Overland Pass Pipeline - The Overland Pass Pipeline agreement provides that distributions to Overland Pass Pipeline’s members are to be made on a pro rata basis according to each member’s percentage interest. The Overland Pass Pipeline Company Management Committee determines the amount and timing of such distributions. Any changes to, or suspension of, the cash distributions from Overland Pass Pipeline requires the unanimous approval of the Overland Pass Pipeline Company Management Committee. Cash distributions are equal to 100% of available cash as defined in the limited liability company agreement. In 2020, 2019 and 2018, our contributions to Overland Pass Pipeline were not material. Roadrunner - The Roadrunner agreement provides that distributions to members are made on a pro rata basis according to each member’s ownership interest. As the operator, we have been delegated the authority to determine such distributions in accordance with, and on the frequency set forth in, the Roadrunner agreement. Cash distributions are equal to 100% of available cash, as defined in the limited liability company agreement. In 2020, 2019 and 2018, our contributions to Roadrunner were not material. We have an operating agreement with Roadrunner that provides for reimbursement or payment to us for management services and certain operating costs. Reimbursements and payments from Roadrunner included in operating income in our Consolidated Statements of Income for the years ended December 31, 2020, 2019 and 2018, were not material.

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- Definition The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.3A-04) -URI http://asc.fasb.org/extlink&oid=116822174&loc=d3e355119-122828 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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