Schedule Of Segment Assets (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,364.8	$ 1,252.1
Sealing Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	555.4	474.8
Engineered Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	328.7	324.3
Engine Products And Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	126.7	99.1
Corporate [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 354.0	$ 353.9