Consolidated Statements of Operations (unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net sales	$ 838.0	$ 802.8	$ 1,582.5	$ 1,512.7
Cost of goods sold	517.1	501.9	992.4	952.8
Gross profit	320.9	300.9	590.1	559.9
Selling, general and administrative expenses	144.0	142.1	280.8	275.4
Research and development expenses	20.3	16.6	40.8	33.5
Interest expense and related financing costs	11.1	10.9	22.3	21.4
Interest accretion on deferred payment obligations	13.6	0	21.8	0
Gain on termination of postretirement plans	(7.9)	0	(7.9)	0
Chapter 11 expenses, net of interest income	3.0	3.3	9.1	8.1
Equity in earnings of unconsolidated affiliate	(3.1)	(9.2)	(6.8)	(14.3)
Other expense, net	10.9	3.9	20.9	11.8
Total costs and expenses	191.9	167.6	381.0	335.9
Income before income taxes	129.0	133.3	209.1	224.0
Benefit from (provision for) income taxes	7.7	(42.5)	(22.1)	(73.8)
Net income	136.7	90.8	187.0	150.2
Less: Net income attributable to noncontrolling interests	(0.5)	(0.5)	(0.7)	(0.8)
Net income attributable to W. R. Grace & Co. shareholders	$ 136.2	$ 90.3	$ 186.3	$ 149.4
Basic earnings per share:
Net income attributable to W. R. Grace & Co. shareholders (in dollars per share)	$ 1.79	$ 1.18	$ 2.44	$ 1.97
Weighted average number of basic shares	75.9	76.3	76.5	76.0
Diluted earnings per share:
Net income attributable to W. R. Grace & Co. shareholders (in dollars per share)	$ 1.77	$ 1.16	$ 2.40	$ 1.93
Weighted average number of diluted shares	76.8	77.6	77.5	77.4