Consolidated Statements of Operations (unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales	$ 709.9	$ 754.4
Cost of goods sold	446.1	477.3
Gross profit	263.8	277.1
Selling, general and administrative expenses	128.9	136.6
Restructuring expenses and related asset impairments	0.8	3.0
Research and development expenses	16.9	16.5
Defined benefit pension expense	18.6	18.8
Interest expense and related financing costs	10.5	11.3
Provision for environmental remediation	1.0	0.6
Chapter 11 expenses, net of interest income	4.8	4.5
Equity in earnings of unconsolidated affiliate	(5.1)	(5.7)
Other (income) expense, net	6.1	(0.6)
Total costs and expenses	182.5	185.0
Income before income taxes	81.3	92.1
Provision for income taxes	(28.1)	(30.8)
Net income	53.2	61.3
Less: Net income attributable to noncontrolling interests	(0.3)	(0.4)
Net income attributable to W. R. Grace & Co. shareholders	$ 52.9	$ 60.9
Basic earnings per share:
Net income attributable to W. R. Grace & Co. shareholders (in dollars per share)	$ 0.70	$ 0.82
Weighted average number of basic shares	75.7	74.3
Diluted earnings per share:
Net income attributable to W. R. Grace & Co. shareholders (in dollars per share)	$ 0.69	$ 0.80
Weighted average number of diluted shares	77.2	76.4