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Investment in ATC | 3 Months Ended
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Mar. 31, 2018
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 portions of Wisconsin, Michigan, Minnesota and Illinois. We account for our investment in ATC under the equity method of accounting. As of March 31, 2018, our equity investment in ATC was $120.1 million ($118.7 million at December 31, 2017). In the first three months of 2018, we invested $1.6 million in ATC, and on April 30, 2018, we invested an additional $2.3 million. We expect to make additional investments of $2.6 million in 2018.
ALLETE’s Investment in ATC |
Millions |
Equity Investment Balance as of December 31, 2017 |  | $118.7 |
Cash Investments | 1.6 |
Equity in ATC Earnings | 4.7 |
Distributed ATC Earnings | (5.2 | )
Amortization of the Remeasurement of Deferred Income Taxes (a) | 0.3 |
Equity Investment Balance as of March 31, 2018 |  | $120.1 |
(a) Amortization related to the impact of the remeasurement of deferred income tax assets and liabilities resulting from the TCJA. NOTE 7. INVESTMENT IN ATC (Continued) In 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. In 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.)

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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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