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UNCONSOLIDATED AFFILIATES (Notes) | 6 Months Ended
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Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract] |
UNCONSOLIDATED AFFILIATES | UNCONSOLIDATED AFFILIATES Equity in Net Earnings from Investments - The following table sets forth our equity in net earnings from investments for the periods indicated:
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
| (Thousands of dollars)
Northern Border Pipeline | $ | 16,347 |  |  | $ | 12,586 |  |  | $ | 36,472 |  |  | $ | 32,825 |
Roadrunner | 9,300 |  |  | 7,602 |  |  | 18,441 |  |  | 15,351 |
Overland Pass Pipeline | 7,885 |  |  | 4,739 |  |  | 12,893 |  |  | 7,711 |
Other | 2,098 |  |  | 793 |  |  | 4,164 |  |  | 3,153 |
Equity in net earnings from investments | $ | 35,630 |  |  | $ | 25,720 |  |  | $ | 71,970 |  |  | $ | 59,040 |
We incurred expenses in transactions with unconsolidated affiliates of $15.6 million and $12.5 million for the three months ended June 30, 2022 and 2021, respectively, and $30.1 million and $28.0 million for the six months ended June 30, 2022 and 2021, respectively, primarily related to Northern Border Pipeline and Overland Pass Pipeline. Revenue earned and accounts receivable from, and accounts payable to, our equity-method investees 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 all periods presented 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 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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