Consolidated Statements of (Deficit) Equity (unaudited) - USD ($) $ in Millions	Total	Common Stock	Accumulated deficit	Treasury Stock	Net Parent Investment	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 2014	$ 607.4				$ 670.6	$ (66.0)	$ 2.8
Increase (Decrease) in Stockholders' Equity
Net income	48.0				47.7		0.3
Other comprehensive (loss) income	(19.2)					(19.4)	0.2
Net transfer (to) from parent	4.1				4.1
Balance at Jun. 30, 2015	640.3				722.4	(85.4)	3.3
Balance at Dec. 31, 2015	474.1				598.3	(127.7)	3.5
Increase (Decrease) in Stockholders' Equity
Net income	47.8		$ 39.9		7.2		0.7
Other comprehensive (loss) income	0.2					0.0	0.2
Net transfer (to) from parent	(676.5)				(676.5)
Reclassification of net parent investment in connection with Separation	0.0	$ 0.7	(71.7)		71.0
Share based compensation	3.2		3.2
Exercise of stock options	2.5		2.5
Tax benefit related to stock plans	1.0		1.0
Treasury stock purchased under GCP 2016 Stock Incentive Plan	(1.7)			$ (1.7)
Noncontrolling interest dividend	(0.3)						(0.3)
Balance at Jun. 30, 2016	$ (149.7)	$ 0.7	$ (25.1)	$ (1.7)	$ 0.0	$ (127.7)	$ 4.1