Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 1,251.2	$ 1,048.3
Restricted cash and cash equivalents	160.6	136.5
Trade accounts receivable, less allowance of $4.8 (2011-$8.1)	471.2	461.8
Accounts receivable-unconsolidated affiliate	12.2	11.2
Inventories	309.0	329.1
Deferred income taxes	58.8	66.5
Other current assets	95.1	93.0
Total Current Assets	2,358.1	2,146.4
Properties and equipment, net of accumulated depreciation and amortization of $1,780.1 (2011-$1,722.7)	735.4	723.5
Goodwill	170.0	148.2
Patents, licenses and other intangible assets, net	84.5	70.6
Deferred income taxes	756.5	759.4
Asbestos-related insurance	500.0	500.0
Overfunded defined benefit pension plans	32.8	37.1
Investment in unconsolidated affiliate	81.2	70.8
Other assets	38.0	38.0
Total Assets	4,756.5	4,494.0
Current Liabilities
Debt payable within one year	72.4	57.9
Debt payable-unconsolidated affiliate	3.5	3.4
Accounts payable	253.0	257.1
Accounts payable-unconsolidated affiliate	0.2	0.5
Other current liabilities	305.1	314.0
Total Current Liabilities	634.2	632.9
Debt payable after one year	13.2	3.3
Debt payable-unconsolidated affiliate	22.1	18.3
Deferred income taxes	24.1	19.8
Underfunded and unfunded defined benefit pension plans	380.6	407.4
Other liabilities	43.6	49.1
Total Liabilities Not Subject to Compromise	1,117.8	1,130.8
Liabilities Subject to Compromise-Note 2
Debt plus accrued interest	965.3	941.8
Income tax contingencies	80.7	69.3
Asbestos-related contingencies	1,700.0	1,700.0
Environmental contingencies	143.3	149.9
Postretirement benefits	189.6	185.2
Other liabilities and accrued interest	157.6	149.5
Total Liabilities Subject to Compromise	3,236.5	3,195.7
Total Liabilities	4,354.3	4,326.5
Commitments and Contingencies-Note 10
Equity
Common stock issued, par value $0.01; 300,000,000 shares authorized; outstanding: 75,248,277 (2011-73,886,050)	0.8	0.7
Paid-in capital	516.5	472.9
Retained earnings	506.8	301.1
Treasury stock, at cost: shares: 1,731,483 (2011-3,093,710)	(20.6)	(36.8)
Accumulated other comprehensive loss	(610.7)	(578.5)
Total W. R. Grace & Co. Shareholders' Equity	392.8	159.4
Noncontrolling interests	9.4	8.1
Total Equity	402.2	167.5
Total Liabilities and Equity	$ 4,756.5	$ 4,494.0