Consolidated Balance Sheets (unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 1,054.7	$ 1,336.9
Short-term Investments	500.0	0
Restricted cash and cash equivalents	185.2	197.6
Trade accounts receivable, less allowance of $5.4 (2012—$5.2)	467.8	474.8
Accounts receivable—unconsolidated affiliate	16.1	15.6
Inventories	314.8	278.6
Deferred income taxes	10.6	58.3
Other current assets	140.4	78.4
Total Current Assets	2,689.6	2,440.2
Properties and equipment, net of accumulated depreciation and amortization of $1,830.2 (2012—$1,785.1)	787.8	770.5
Goodwill	204.0	196.7
Patents, licenses and other intangible assets, net	76.9	82.7
Deferred income taxes	814.6	956.3
Asbestos-related insurance	500.0	500.0
Overfunded defined benefit pension plans	30.2	33.8
Investment in unconsolidated affiliate	90.8	85.5
Other assets	36.1	24.5
Total Assets	5,230.0	5,090.2
Current Liabilities
Debt payable within one year	86.2	83.4
Debt payable—unconsolidated affiliate	4.5	3.6
Accounts payable	249.5	249.4
Accounts payable—unconsolidated affiliate	10.8	2.6
Other current liabilities	289.3	307.3
Total Current Liabilities	640.3	646.3
Debt payable after one year	7.4	13.4
Debt payable—unconsolidated affiliate	24.1	22.4
Deferred income taxes	23.9	27.1
Underfunded and unfunded defined benefit pension plans	250.8	400.6
Other liabilities	45.2	45.0
Total Liabilities Not Subject to Compromise	991.7	1,154.8
Liabilities Subject to Compromise-Note 2
Debt plus accrued interest	997.5	973.3
Income tax contingencies	85.4	87.6
Asbestos-related contingencies	2,065.0	2,065.0
Environmental contingencies	134.0	140.5
Postretirement benefits	174.8	188.1
Other liabilities and accrued interest	169.7	162.6
Total Liabilities Subject to Compromise	3,626.4	3,617.1
Total Liabilities	4,618.1	4,771.9
Commitments and Contingencies—Note 10
Equity
Common stock issued, par value $0.01; 300,000,000 shares authorized; outstanding: 76,849,629 (2012—75,565,409)	0.8	0.8
Paid-in capital	530.1	536.5
Retained earnings	600.3	395.2
Treasury stock, at cost: shares: 140,571 (2012—1,414,351)	(1.7)	(16.8)
Accumulated other comprehensive loss	(527.7)	(607.3)
Total W. R. Grace & Co. Shareholders' Equity	601.8	308.4
Noncontrolling interests	10.1	9.9
Total Equity	611.9	318.3
Total Liabilities and Equity	$ 5,230.0	$ 5,090.2