Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 144.9	$ 277.3	$ 257.7
Other comprehensive income (loss):
Defined benefit pension and other postretirement plans, net of income taxes	(1.0)	(2.6)	4.6
Currency translation adjustments	(43.3)	(28.0)	(23.6)
Gain (loss) from hedging activities, net of income taxes	1.3	(4.5)	(0.2)
Other than temporary impairment of investment	0.0	0.8	0.0
(Loss) gain on securities available for sale, net of income taxes	0.0	(0.1)	0.1
Total other comprehensive income (loss) attributable to noncontrolling interests	0.2	(2.2)	(0.9)
Total other comprehensive loss	(42.8)	(36.6)	(20.0)
Comprehensive income	102.1	240.7	237.7
Less: comprehensive (income) loss attributable to noncontrolling interests	(0.9)	1.2	(0.7)
Comprehensive income attributable to W. R. Grace & Co. shareholders	$ 101.2	$ 241.9	$ 237.0