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Business Segment (Tables) | 12 Months Ended
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Dec. 31, 2021
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
Year Ended December 31 | 2021 | 2020 | 2019
Millions |  |  |
Operating Revenue |  |  |
Residential | $160.8 |  | $140.7 |  | $139.6 |
Commercial | 168.6 |  | 139.5 |  | 145.7 |
Municipal | 52.0 |  | 41.2 |  | 48.6 |
Industrial | 565.5 |  | 432.8 |  | 476.4 |
Other Power Suppliers | 168.7 |  | 138.8 |  | 153.7 |
CIP Financial Incentive (a) | 2.4 |  | 2.4 |  | 2.8 |
Other | 109.9 |  | 91.9 |  | 75.6 |
Total Regulated Operations | 1,227.9 |  | 987.3 |  | 1,042.4 |
ALLETE Clean Energy |  |  |
Long-term PSA | 75.5 |  | 68.3 |  | 48.0 |
Other | 11.4 |  | 11.3 |  | 11.6 |
Total ALLETE Clean Energy | 86.9 |  | 79.6 |  | 59.6 |
U.S. Water Services (b) |  |  |
Point-in-time | — |  | — |  | 19.0 |
Contract | — |  | — |  | 9.2 |
Capital Project | — |  | — |  | 5.2 |
Total U.S. Water Services | — |  | — |  | 33.4 |
Corporate and Other |  |  |
Long-term Contract | 84.4 |  | 86.0 |  | 82.8 |
Other | 20.0 |  | 16.2 |  | 22.3 |
Total Corporate and Other | 104.4 | 102.2 | 105.1
Total Operating Revenue | $1,419.2 |  | $1,169.1 |  | $1,240.5 |
Net Income (Loss) Attributable to ALLETE (c) |  |  |
Regulated Operations | $129.1 | $136.3 | $154.4
ALLETE Clean Energy | 26.3 |  | 29.9 |  | 12.4 |
U.S. Water Services | — |  | — |  | (1.1) |
Corporate and Other (b)(d) | 13.8 |  | 8.0 |  | 19.9 |
Total Net Income Attributable to ALLETE | $169.2 |  | $174.2 |  | $185.6 |
(a) See Note 4. Regulatory Matters. (b) In 2019, ALLETE sold U.S. Water Services. The Company recognized a gain on the sale of $13.2 million after-tax which is reflected in Corporate and Other. (See Note 1. Operations and Significant Accounting Policies.) (c) Includes interest expense resulting from intercompany loan agreements and allocated to certain subsidiaries. The amounts are eliminated in consolidation. (d) In 2021, South Shore Energy sold a portion of its undivided ownership interest in NTEC to Basin. The closing of the transaction resulted in the recognition of an approximately $8.5 million after-tax gain which is reflected in Corporate and Other. (See Note 1. Operations and Significant Accounting Policies.)
Year Ended December 31 | 2021 | 2020 | 2019
Millions |  |  |
Depreciation and Amortization |  |  |
Regulated Operations | $170.7 | $166.9 | $159.4
ALLETE Clean Energy | 49.2 |  | 37.9 |  | 26.8 |
U.S. Water Services | — |  | — |  | 2.3 |
Corporate and Other | 11.8 |  | 13.0 |  | 13.5 |
Total Depreciation and Amortization | $231.7 |  | $217.8 |  | $202.0 |
Interest Expense (a) |  |  |
Regulated Operations | $57.3 | $58.5 | $58.9
ALLETE Clean Energy | 1.5 |  | 2.2 |  | 2.8 |
U.S. Water Services | — |  | — |  | 0.2 |
Corporate and Other | 13.2 |  | 13.2 |  | 8.0 |
Eliminations | (2.9) |  | (8.3) |  | (5.0) |
Total Interest Expense | $69.1 |  | $65.6 |  | $64.9 |
Equity Earnings |  |  |
Regulated Operations | $21.3 | $22.3 | $21.7
Corporate and Other | (1.3) |  | (0.2) |  | — |
Total Equity Earnings | $20.0 |  | $22.1 |  | $21.7 |
Income Tax Expense (Benefit) |  |  |
Regulated Operations | $(16.6) | $(19.4) | $(7.1)
ALLETE Clean Energy | (16.6) | (19.1) |  | (11.9) |
U.S. Water Services | — |  | — |  | (0.4) |
Corporate and Other (b) | 6.3 | (1.0) |  | 12.8 |
Total Income Tax Benefit | $(26.9) | $(39.5) | $(6.6)
(a) Includes interest expense resulting from intercompany loan agreements and allocated to certain subsidiaries. The amounts are eliminated in consolidation. (b) In 2019, ALLETE sold U.S. Water Services. The Company recognized income tax expense of $10.4 million for the gain on sale of U.S. Water Services which is reflected in Corporate and Other. (See Note 1. Operations and Significant Accounting Policies.)
As of December 31 | 2021 | 2020 |
Millions |  |  |
Assets |  |  |
Regulated Operations | $4,289.4 | $4,196.8 |
ALLETE Clean Energy | 1,719.4 |  | 1,483.3 |  |
Corporate and Other | 426.2 |  | 404.5 |  |
Total Assets | $6,435.0 |  | $6,084.6 |  |
Capital Expenditures |  |  |
Regulated Operations | $166.8 | $133.7 |
ALLETE Clean Energy | 269.9 |  | 507.8 |  |
Corporate and Other | 39.7 |  | 15.7 |  |
Total Capital Expenditures | $476.4 |  | $657.2 |  |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 + Details
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