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Business Segments
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block] BUSINESS SEGMENTS
We present three reportable segments: Regulated Operations, ALLETE Clean Energy, and U.S. Water Services. We measure performance of our operations through budgeting and monitoring of contributions to consolidated net income by each business segment.

Regulated Operations includes three operating segments which consist of our regulated utilities, Minnesota Power and SWL&P, as well as our investment in ATC. ALLETE Clean Energy is our business focused on developing, acquiring and operating clean and renewable energy projects. U.S. Water Services was our integrated water management company, which reflects operating results until it was sold in March 2019. We also present Corporate and Other which includes two operating segments, BNI Energy, our coal mining operations in North Dakota, and ALLETE Properties, our legacy Florida real estate investment, along with our investment in Nobles 2, South Shore Energy, our non-rate regulated, Wisconsin subsidiary developing NTEC, other business development and corporate expenditures, unallocated interest expense, a small amount of non-rate base generation, approximately 4,000 acres of land in Minnesota, and earnings on cash and investments.
NOTE 13. BUSINESS SEGMENTS (Continued)

Year Ended December 31202120202019
Millions   
Operating Revenue
Residential $160.8 $140.7 $139.6 
Commercial168.6 139.5 145.7 
Municipal52.0 41.2 48.6 
Industrial565.5 432.8 476.4 
Other Power Suppliers168.7 138.8 153.7 
CIP Financial Incentive (a)
2.4 2.4 2.8 
Other109.9 91.9 75.6 
Total Regulated Operations 1,227.9 987.3 1,042.4 
ALLETE Clean Energy
Long-term PSA75.5 68.3 48.0 
Other11.4 11.3 11.6 
Total ALLETE Clean Energy86.9 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 Contract84.4 86.0 82.8 
Other20.0 16.2 22.3 
Total Corporate and Other104.4102.2105.1
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 Energy26.3 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.)




NOTE 13. BUSINESS SEGMENTS (Continued)

Year Ended December 31202120202019
Millions   
Depreciation and Amortization
Regulated Operations$170.7$166.9$159.4
ALLETE Clean Energy49.2 37.9 26.8 
U.S. Water Services— — 2.3 
Corporate and Other11.8 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 Energy1.5 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 3120212020
Millions
Assets
Regulated Operations $4,289.4$4,196.8
ALLETE Clean Energy1,719.4 1,483.3 
Corporate and Other426.2 404.5 
Total Assets $6,435.0 $6,084.6 
Capital Expenditures
Regulated Operations$166.8$133.7
ALLETE Clean Energy269.9 507.8 
Corporate and Other39.7 15.7 
Total Capital Expenditures$476.4 $657.2