Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 69.7	$ 76.0	$ 206.2	$ 207.0
Other comprehensive income (loss):
Defined benefit pension and other postretirement plans, net of income taxes	28.8	(13.0)	98.3	(40.3)
Currency translation adjustments	5.0	14.5	(18.3)	5.1
Gain (loss) from hedging activities, net of income taxes	0	1.5	(0.4)	3.0
Total other comprehensive income (loss) attributable to noncontrolling interests	(0.7)	(0.3)	(0.9)	0
Total other comprehensive income	33.1	2.7	78.7	(32.2)
Comprehensive income	102.8	78.7	284.9	174.8
Less: comprehensive income attributable to noncontrolling interests	0.4	(0.2)	(0.2)	(1.3)
Comprehensive income attributable to W. R. Grace & Co. shareholders	$ 103.2	$ 78.5	$ 284.7	$ 173.5