Equity Investments (Tables)

12 Months Ended

Dec. 31, 2020

Equity Method Investments and Joint Ventures [Abstract]

ALLETE's Investment in ATC [Table Text Block]

ALLETE’s Investment in ATC
Year Ended December 31	2020	2019
Millions
Equity Investment Beginning Balance	$141.6	$128.1
Cash Investments	2.7	6.6
Equity in ATC Earnings	22.3	21.7
Distributed ATC Earnings	(18.9)	(16.1)
Amortization of the Remeasurement of Deferred Income Taxes	1.3	1.3
Equity Investment Ending Balance	$149.0	$141.6

ATC Summarized Financial Data
Balance Sheet Data
As of December 31	2020	2019
Millions
Current Assets	$92.8	$84.6
Non-Current Assets	5,400.5	5,244.3
Total Assets	$5,493.3	$5,328.9
Current Liabilities	$310.8	$502.6
Long-Term Debt	2,512.2	2,312.8
Other Non-Current Liabilities	378.2	298.9
Members’ Equity	2,292.1	2,214.6
Total Liabilities and Members’ Equity	$5,493.3	$5,328.9

Income Statement Data
Year Ended December 31	2020	2019	2018
Millions
Revenue	$758.1	$744.4	$690.5
Operating Expense	372.4	373.5	358.7
Other Expense	110.9	110.5	108.3
Net Income	$274.8	$260.4	$223.5
ALLETE’s Equity in Net Income	$22.3	$21.7	$17.5