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UNCONSOLIDATED AFFILIATES (Notes) | 9 Months Ended
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Sep. 30, 2019
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 (loss) from investments for the periods indicated:
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (Thousands of dollars)
Northern Border Pipeline | $ | 16,102 |  |  | $ | 16,486 |  |  | $ | 50,593 |  |  | $ | 48,863 |
Overland Pass Pipeline | 15,481 |  |  | 16,081 |  |  | 48,340 |  |  | 48,714 |
Roadrunner | 7,421 |  |  | 6,303 |  |  | 19,836 |  |  | 16,803 |
Other | (1,428 | ) |  | 443 |  |  | (3,594 | ) |  | 1,690 |
Equity in net earnings from investments | $ | 37,576 |  |  | $ | 39,313 |  |  | $ | 115,175 |  |  | $ | 116,070 |
Unconsolidated Affiliates Financial Information - The following table sets forth summarized combined financial information of our unconsolidated affiliates for the periods indicated:
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (Thousands of dollars)
Income Statement |  |  |  |  |  |  |
Revenues | $ | 151,210 |  |  | $ | 160,962 |  |  | $ | 471,461 |  |  | $ | 471,641 |
Operating expenses | $ | 69,783 |  |  | $ | 69,004 |  |  | $ | 217,287 |  |  | $ | 205,525 |
Net income | $ | 74,341 |  |  | $ | 85,361 |  |  | $ | 234,154 |  |  | $ | 247,754 |
Distributions paid to us (a) | $ | 44,357 |  |  | $ | 47,197 |  |  | $ | 203,347 |  |  | $ | 145,437 |
(a) - As determined by the Northern Border Pipeline Management Committee, we received an additional distribution of $50.0 million from Northern Border Pipeline during the nine months ended September 30, 2019. We incurred expenses in transactions with unconsolidated affiliates of $41.9 million and $37.5 million for the three months ended September 30, 2019 and 2018, respectively, and $124.2 million and $113.2 million for the nine months ended September 30, 2019 and 2018, respectively, primarily related to Overland Pass Pipeline and Northern Border Pipeline. Accounts payable to our equity-method investees at September 30, 2019, and December 31, 2018, were $13.8 million and $14.7 million, respectively. 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 three and nine months ended September 30, 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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