CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 38.1	$ 40.0
Accounts receivable, net	226.3	202.7
Inventories	154.4	153.8
Prepaid expenses	24.0	17.0
Assets held-for-sale	14.5	0.2
Income taxes receivable	17.4	7.0
Available-for-sale securities	9.1	0
Deferred income taxes	6.7	7.0
Other	0.8	1.8
Total current assets	491.3	429.5
Property, plant, equipment, and mineral rights and reserves:
Land	10.8	13.0
Mineral rights	5.1	48.6
Depreciable assets	557.7	552.0
Gross property, plant and equipment	573.6	613.6
Accumulated depreciation and depletion	(318.6)	(311.7)
Net property, plant and equipment	255.0	301.9
Goodwill	68.6	70.2
Intangible assets, net	28.9	33.9
Investment in and advances to affiliates and joint ventures	34.5	27.8
Available-for-sale securities	0	14.6
Deferred income taxes	5.3	7.4
Other assets	27.4	25.3
Total noncurrent assets	419.7	481.1
Total Assets	911.0	910.6
Current liabilities:
Accounts payable	58.3	51.1
Accrued income taxes	12.5	5.0
Accrued liabilities	64.4	58.4
Total current liabilities	135.2	114.5
Noncurrent liabilities:
Long-term debt	270.9	248.8
Pension liabilities	38.1	37.5
Deferred compensation	10.9	9.4
Deferred income taxes	1.6	12.8
Other long-term liabilities	19.5	22.5
Total noncurrent liabilities	341.0	331.0
Shareholders' Equity:
Common stock	0.3	0.3
Additional paid in capital	115.5	105.1
Retained earnings	343.0	355.2
Accumulated other comprehensive income (loss)	(20.2)	0.8
Total AMCOL shareholders' equity	438.6	461.4
Noncontrolling interest	(3.8)	3.7
Total equity	434.8	465.1
Total Liabilities and Shareholders' Equity	$ 911.0	$ 910.6