Consolidated Balance Sheets (unaudited) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 366.9	$ 557.5
Trade accounts receivable, less allowance of $7.0 (2014—$5.8)	480.9	481.1
Inventories	322.8	332.8
Deferred income taxes	244.0	235.4
Other current assets	88.9	84.1
Total Current Assets	1,503.5	1,690.9
Properties and equipment, net of accumulated depreciation and amortization of $1,771.0 (2014—$1,818.4)	825.4	833.5
Goodwill	444.8	452.9
Technology and other intangible assets, net	273.6	288.0
Deferred income taxes	552.2	612.0
Overfunded defined benefit pension plans	45.6	44.1
Investment in unconsolidated affiliate	108.7	113.1
Other assets	60.2	60.7
Total Assets	3,814.0	4,095.2
Current Liabilities
Debt payable within one year	76.8	96.8
Accounts payable	273.0	255.3
PI warrant liability	0.0	490.0
Other current liabilities	339.0	340.0
Total Current Liabilities	688.8	1,182.1
Liabilities, Noncurrent [Abstract]
Debt payable after one year	2,146.5	1,919.0
Deferred income taxes	18.5	19.3
Income tax contingencies	24.2	24.0
Underfunded and unfunded defined benefit pension plans	438.6	457.5
Other liabilities	112.1	124.3
Total Liabilities	$ 3,428.7	$ 3,726.2
Commitments and Contingencies—Note 8
Equity
Common stock issued, par value $0.01; 300,000,000 shares authorized; outstanding: 72,418,302 (2014—72,922,565)	$ 0.7	$ 0.7
Paid-in capital	491.1	526.1
Retained earnings	402.2	292.1
Treasury stock, at cost: shares: 5,038,323 (2014—4,524,688)	475.9	429.2
Accumulated other comprehensive loss	(36.8)	(23.8)
Total W. R. Grace & Co. Shareholders' Equity	381.3	365.9
Noncontrolling interests	4.0	3.1
Total Equity	385.3	369.0
Total Liabilities and Equity	$ 3,814.0	$ 4,095.2