Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Changes in goodwill balances
Balance at the beginning of the period	$ 196.7
Goodwill acquired during the year	262.9
Foreign currency translation / other adjustments	(2.1)
Balance at the end of the period	457.5
Grace Catalysts Technologies
Changes in goodwill balances
Balance at the beginning of the period	39.5
Goodwill acquired during the year	253.2
Foreign currency translation / other adjustments	0.7
Balance at the end of the period	293.4
Grace Materials Technologies
Changes in goodwill balances
Balance at the beginning of the period	40.5
Goodwill acquired during the year
Foreign currency translation / other adjustments	0.7
Balance at the end of the period	41.2
Grace Construction Products
Changes in goodwill balances
Balance at the beginning of the period	116.7
Goodwill acquired during the year	9.7
Foreign currency translation / other adjustments	(3.5)
Balance at the end of the period	$ 122.9