Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net Income	$ 24.4	$ 37.1
Unrealized Gain on Securities, Net of Income Taxes of $0.7 and $0.6	1.0	0.9
Unrealized Loss on Derivatives, Net of Income Taxes of $(0.1) and $-	(0.1)	0
Defined Benefit Pension and Other Postretirement Benefit Plans, Net of Income Taxes of $0.3 and $0.3	0.5	0.4
Total Other Comprehensive Income	1.4	1.3
Total Comprehensive Income	25.8	38.4
Less: Non-Controlling Interest in Subsidiaries	0	(0.1)
Comprehensive Income Attributable to ALLETE	$ 25.8	$ 38.5