CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net sales	$ 1,494.3	$ 1,452.9	$ 4,584.9	$ 4,463.9
Cost of products sold (exclusive of items shown separately below)	1,347.0	1,194.1	4,001.5	3,884.6
Selling and administrative expenses (exclusive of items shown separately below)	67.7	80.0	204.0	205.7
Depreciation	58.0	53.7	168.2	161.7
Pension and OPEB expense (income)	(16.2)	(5.7)	(48.6)	(29.5)
Total operating costs	1,456.5	1,322.1	4,325.1	4,222.5
Operating profit	37.8	130.8	259.8	241.4
Interest expense	37.5	40.3	115.1	124.5
Other income (expense)	(7.8)	(7.0)	(19.2)	(5.6)
Income (loss) before income taxes	(7.5)	83.5	125.5	111.3
Income tax expense (benefit)	(18.8)	14.6	(40.9)	4.1
Net income	11.3	68.9	166.4	107.2
Less: Net income attributable to noncontrolling interests	17.1	18.0	48.5	52.6
Net income (loss) attributable to AK Steel Holding Corporation	$ (5.8)	$ 50.9	$ 117.9	$ 54.6
Net income (loss) per share attributable to AK Steel Holding Corporation common stockholders:
Basic	$ (0.02)	$ 0.21	$ 0.37	$ 0.26
Diluted	$ (0.02)	$ 0.21	$ 0.37	$ 0.26