Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net sales
Net sales of goods	$ 714.3	$ 686.7	$ 691.8
Service revenues	277.4	258.6	206.3
Freight revenues	21.0	22.1	28.2
Net sales	1,012.7	967.4	926.3
Cost of sales
Cost of goods sold	580.7	503.6	499.8
Cost of service revenues	200.3	180.8	157.0
Cost of freight revenues	16.1	17.5	22.0
Cost of sales	797.1	701.9	678.8
Gross profit	215.6	265.5	247.5
Selling, general and administrative expenses	179.8	167.7	161.5
Operating profit	35.8	97.8	86.0
Other income (expense):
Interest expense, net	(10.3)	(10.4)	(11.0)
Gain on sale of available-for-sale securities	12.6	0	0
Other, net	(2.8)	(3.4)	0.3
Total other income (expense), net	(0.5)	(13.8)	(10.7)
Income before income taxes and income from affiliates and joint ventures	35.3	84.0	75.3
Income tax expense	11.0	23.3	20.8
Income before income from affiliates and joint ventures	24.3	60.7	54.5
Income from affiliates and joint ventures	3.2	3.9	5.2
Income (loss) from continuing operations	27.5	64.6	59.7
Discontinued Operations
Income (loss) on discontinued operations	(4.2)	0.3	(1.2)
Net income (loss)	23.3	64.9	58.5
Net income (loss) attributable to noncontrolling interests	(6.9)	(0.2)	0
Net income (loss) attributable to AMCOL shareholders	30.2	65.1	58.5
Basic earnings (loss) per share
Continuing operations (in dollars per share)	$ 1.06	$ 2.03	$ 1.88
Discontinued operations (in dollars per share)	$ (0.13)	$ 0.01	$ (0.04)
Net income (in dollars per share)	$ 0.93	$ 2.04	$ 1.84
Diluted earnings (loss) per share
Continuing operations (in dollars per share)	$ 1.05	$ 2.00	$ 1.86
Discontinued operations (in dollars per share)	$ (0.13)	$ 0.01	$ (0.04)
Net income (in dollars per share)	$ 0.92	$ 2.01	$ 1.82
Amounts attributable to AMCOL shareholders
Income from continuing operations, net of tax	34.4	64.8	59.7
Discontinued operations, net of tax	(4.2)	0.3	(1.2)
Net income	$ 30.2	$ 65.1	$ 58.5
Dividends declared per share (in dollars per share)	$ 0.80	$ 0.76	$ 0.72