Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 1,008.2	$ 1,048.3
Restricted cash and cash equivalents	139.6	136.5
Trade accounts receivable, less allowance of $8.2 (2011-$8.1)	458.0	461.8
Accounts receivable-unconsolidated affiliate	13.7	11.2
Inventories	358.5	329.1
Deferred income taxes	68.7	66.5
Other current assets	86.5	93.0
Total Current Assets	2,133.2	2,146.4
Properties and equipment, net of accumulated depreciation and amortization of $1,758.2 (2011-$1,722.7)	726.8	723.5
Goodwill	150.4	148.2
Deferred income taxes	735.0	759.4
Asbestos-related insurance	500.0	500.0
Overfunded defined benefit pension plans	33.3	37.1
Investment in unconsolidated affiliate	76.4	70.8
Other assets	104.9	108.6
Total Assets	4,460.0	4,494.0
Current Liabilities
Debt payable within one year	59.1	57.9
Debt payable-unconsolidated affiliate	3.5	3.4
Accounts payable	259.1	257.1
Accounts payable-unconsolidated affiliate	4.5	0.5
Other current liabilities	291.1	314.0
Total Current Liabilities	617.3	632.9
Debt payable after one year	3.0	3.3
Debt payable-unconsolidated affiliate	19.4	18.3
Deferred income taxes	19.1	19.8
Underfunded and unfunded defined benefit pension plans	293.5	407.4
Other liabilities	45.6	49.1
Total Liabilities Not Subject to Compromise	997.9	1,130.8
Liabilities Subject to Compromise-Note 2
Debt plus accrued interest	949.5	941.8
Income tax contingencies	70.3	69.3
Asbestos-related contingencies	1,700.0	1,700.0
Environmental contingencies	146.3	149.9
Postretirement benefits	184.3	185.2
Other liabilities and accrued interest	152.3	149.5
Total Liabilities Subject to Compromise	3,202.7	3,195.7
Total Liabilities	4,200.6	4,326.5
Commitments and Contingencies-Note 10
Equity (Deficit)
Common stock issued, par value $0.01; 300,000,000 shares authorized; outstanding: 2012-74,569,101 (2011-73,886,050)	0.7	0.7
Paid-in capital	479.1	472.9
Retained earnings	362.0	301.1
Treasury stock, at cost: shares: 2012-2,410,659 (2011-3,093,710)	(28.7)	(36.8)
Accumulated other comprehensive loss	(562.3)	(578.5)
Total W. R. Grace & Co. Shareholders' Equity (Deficit)	250.8	159.4
Noncontrolling interests	8.6	8.1
Total Equity (Deficit)	259.4	167.5
Total Liabilities and Equity (Deficit)	$ 4,460.0	$ 4,494.0