Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 754.4	$ 695.7
Cost of goods sold	477.3	443.3
Gross profit	277.1	252.4
Selling, general and administrative expenses	136.6	129.9
Restructuring expenses and related asset impairments	3.0	0.2
Research and development expenses	16.5	15.6
Defined benefit pension expense	18.8	16.5
Interest expense and related financing costs	11.3	10.4
Provision for environmental remediation	0.6	0.2
Chapter 11 expenses, net of interest income	4.5	5.8
Equity in earnings of unconsolidated affiliate	(5.7)	(3.5)
Other income, net	(0.6)	(2.2)
Total costs and expenses	185.0	172.9
Income before income taxes	92.1	79.5
Provision for income taxes	(30.8)	(25.5)
Net income	61.3	54.0
Less: Net loss (income) attributable to noncontrolling interests	(0.4)	0.2
Net income attributable to W. R. Grace & Co. shareholders	$ 60.9	$ 54.2
Basic earnings per share:
Net income attributable to W. R. Grace & Co. shareholders (in dollars per share)	$ 0.82	$ 0.74
Weighted average number of basic shares (in shares)	74.3	73.2
Diluted earnings per share:
Net income attributable to W. R. Grace & Co. shareholders (in dollars per share)	$ 0.8	$ 0.72
Weighted average number of diluted shares (in shares)	76.4	75.1