Equity Investments (Tables)

12 Months Ended

Dec. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

ALLETE's Investment in ATC [Table Text Block]

ALLETE’s Investment in ATC
Year Ended December 31	2018			2017
Millions
Equity Investment Beginning Balance		$118.7			$135.6
Cash Investments	6.2			7.8
Equity in ATC Earnings	17.5			22.5
Distributed ATC Earnings	(15.2		)	(19.3		)
Remeasurement of Deferred Income Taxes (a)	—			(27.9		)
Amortization of the Remeasurement of Deferred Income Taxes	0.9			—
Equity Investment Ending Balance		$128.1			$118.7

(a) Impact of the remeasurement of deferred income tax assets and liabilities resulting from the TCJA.

ATC Summarized Financial Data
Balance Sheet Data
As of December 31	2018		2017
Millions
Current Assets		$87.2		$87.7
Non-Current Assets	4,928.8		4,598.9
Total Assets		$5,016.0		$4,686.6
Current Liabilities		$640.0		$767.2
Long-Term Debt	2,014.0		1,790.6
Other Non-Current Liabilities	295.3		240.3
Members’ Equity	2,066.7		1,888.5
Total Liabilities and Members’ Equity		$5,016.0		$4,686.6

Income Statement Data
Year Ended December 31	2018		2017		2016
Millions
Revenue		$690.5		$721.6		$650.8
Operating Expense	358.7		344.9		322.5
Other Expense	108.3		104.1		95.5
Net Income		$223.5		$272.6		$232.8
ALLETE’s Equity in Net Income		$17.5		$22.5		$18.5