Garlock Sealing Technologies LLC and Garrison Litigation Management Group, Ltd., and OldCo, LLC - Additional Information (Detail) - USD ($) $ in Millions		6 Months Ended		12 Months Ended
	Nov. 11, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Jan. 14, 2015	Jun. 30, 2014
Product Liability Contingency [Line Items]
Loss Contingency, Accrual, Current		$ 60.8		$ 30.0
Litigation Settlement, Amount Awarded to other third party	$ 20.0
Deferred income taxes		115.3		152.6
Liabilities Subject to Compromise [Abstract]
Liabilities Subject to Compromise, Asbestos Obligations		0.0		80.0
GST, LLC [Member]
Product Liability Contingency [Line Items]
Litigation Settlement, Amount Awarded to other third party		370.0
Liability for Asbestos and Environmental Claims, Gross		370.0
Liabilities Subject to Compromise [Abstract]
Liabilities Subject to Compromise, Asbestos Obligations		387.0			$ 337.5		$ 280.5
Liabilities Subject to Compromise, Asbestos Obligations, Claims		16.8				$ 17.0
OldCo [Member]
Product Liability Contingency [Line Items]
Litigation Settlement, Amount Awarded to other third party		110.0		70.0
Deferred income taxes		40.8
Garlock Sealing Technologies [Member]
Product Liability Contingency [Line Items]
Deferred income taxes		90.5		$ 126.0
Payments for (Proceeds from) Businesses and Interest in Affiliates		$ 4.8	$ 0.0