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Investment in ATC | 9 Months Ended
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Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract] |
Investment in ATC [Text Block] | INVESTMENT IN ATC Our wholly-owned subsidiary, ALLETE Transmission Holdings, owns approximately 8 percent of ATC, a Wisconsin-based utility that owns and maintains electric transmission assets in parts of Wisconsin, Michigan, Minnesota and Illinois. We account for our investment in ATC under the equity method of accounting. As of September 30, 2017, our equity investment in ATC was $146.0 million ($135.6 million at December 31, 2016). In the first nine months of 2017, we invested $6.6 million in ATC, and on October 31, 2017, we invested an additional $1.2 million. We do not expect to make any additional investments in 2017.
ALLETE’s Investment in ATC |
Millions |
Equity Investment Balance as of December 31, 2016 |  | $135.6 |
Cash Investments | 6.6 |
Equity in ATC Earnings | 17.3 |
Distributed ATC Earnings | (13.5 | )
Equity Investment Balance as of September 30, 2017 |  | $146.0 |
In September 2016, the FERC issued an order reducing ATC’s authorized return on equity to 10.32 percent, or 10.82 percent including an incentive adder for participation in a regional transmission organization. Prior to this order, ATC had been allowed a return on equity of 12.2 percent which had been impacted by reductions for estimated refunds related to complaints filed with the FERC by several customers located within the MISO service area. NOTE 7. INVESTMENT IN ATC (Continued) In June 2016, a federal administrative law judge ruled on an additional complaint proposing a further reduction in the base return on equity to 9.70 percent, or 10.20 percent including an incentive adder for participation in a regional transmission organization, subject to approval or adjustment by the FERC. A final decision from the FERC on the administrative law judge’s recommendation is pending. (See Note 6. Regulatory Matters.) We own approximately 8 percent of ATC and estimate that for every 50 basis point reduction in ATC’s allowed return on equity our equity earnings in ATC would be impacted annually by approximately $0.5 million after-tax.

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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