Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of carrying amount of goodwill attributable to each operating segment and the changes in those balances during the period

The carrying amount of goodwill attributable to each operating segment and the changes in those balances during the years ended December 31, 2015 and 2014, are as follows:

(In millions)	Grace Catalysts Technologies			Grace Materials Technologies			Grace Construction Products			Total Grace
Balance, December 31, 2013	$	293.4		$	41.2		$	122.9		$	457.5
Foreign currency translation	(0.9		)	(2.3		)	(10.8		)	(14.0		)
Other adjustments	1.3			11.5			(3.4		)	9.4
Balance, December 31, 2014	293.8			50.4			108.7			452.9
Foreign currency translation	(1.0		)	(2.0		)	(10.8		)	(13.8		)
Other adjustments	—			—			(0.1		)	(0.1		)
Balance, December 31, 2015	$	292.8		$	48.4		$	97.8		$	439.0

Summary of net book value of other intangible assets

Grace's net book value of other intangible assets at December 31, 2015 and 2014, was $260.8 million and $288.0 million, respectively, detailed as follows:

	December 31, 2015
(In millions)	Gross Carrying Amount		Accumulated Amortization
Technology	$	254.9	$	60.7
Customer lists	81.1		47.6
Trademarks	34.0		16.3
Other	20.6		5.2
Total	$	390.6	$	129.8

	December 31, 2014
(In millions)	Gross Carrying Amount		Accumulated Amortization
Technology	$	257.9	$	49.5
Customer lists	88.5		46.2
Trademarks	34.9		15.0
Other	21.5		4.1
Total	$	402.8	$	114.8

Summary of estimated amortization expenses

At December 31, 2015, estimated future annual amortization expense for intangible assets is:

	(In millions)
2016	$	17.9
2017	16.7
2018	16.4
2019	14.7
2020	14.3
Thereafter	177.0
	$	257.0