Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 16.9	$ 23.7	[1]
Accounts receivable, net	204.0	206.8	[1]
Inventories	150.6	146.6	[1]
Prepaid expenses	17.2	15.7	[1]
Deferred income taxes	6.2	5.9	[1]
Income tax receivable	5.7	6.9	[1]
Other	4.6	6.7	[1]
Total current assets	405.2	412.3	[1]
Property, plant, equipment, and mineral rights and reserves:
Land	14.3	13.9	[1]
Mineral rights	43.8	41.9	[1]
Depreciable assets	500.2	482.3	[1]
Gross property, plant and equipment	558.3	538.1	[1]
Less: accumulated depreciation and depletion	285.1	275.5	[1]
Net property, plant and equipment	273.2	262.6	[1]
Goodwill	70.2	69.5	[1]
Intangible assets, net	36.9	36.6	[1]
Investment in and advances to affiliates and joint ventures	27.1	26.4	[1]
Available-for-sale securities	2.9	3.8	[1]
Deferred income taxes	8.6	7.8	[1]
Other assets	26.0	23.7	[1]
Total noncurrent assets	444.9	430.4	[1]
Total Assets	850.1	842.7	[1]
Current liabilities:
Accounts payable	47.7	56.4	[1]
Accrued income taxes	6.8	2.7	[1]
Accrued liabilities	57.0	59.0	[1]
Total current liabilities	111.5	118.1	[1]
Noncurrent liabilities:
Long-term debt	250.7	260.7	[1]
Pension liabilities	34.6	34.8	[1]
Deferred compensation	9.5	8.9	[1]
Other long-term liabilities	21.0	20.0	[1]
Total noncurrent liabilities	315.8	324.4	[1]
Shareholders' Equity:
Common stock	0.3	0.3	[1]
Additional paid in capital	97.8	94.5	[1]
Retained earnings	326.6	319.5	[1]
Accumulated other comprehensive income (loss)	(4.7)	(14.9)	[1]
Less: Treasury stock	(1.7)	(3.4)	[1]
Total AMCOL shareholders' equity	418.3	396.0	[1]
Noncontrolling interest	4.5	4.2	[1]
Total equity	422.8	400.2	[1]
Total Liabilities and Shareholders' Equity	$ 850.1	$ 842.7	[1]

[1] *Condensed from audited financial statements.