Commitments and Contingencies (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended												12 Months Ended			12 Months Ended			12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2013 claim LegalMatter	Dec. 31, 2012 claim LegalMatter	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2011 Minimum [Member] defendant	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2011 Maximum [Member] defendant	Dec. 31, 2013 5 year forecast [Member]	Dec. 31, 2013 10 year forecast [Member]	Dec. 31, 2013 15 year forecast [Member]	Dec. 31, 2013 Claims that Specify Amount of Damages Sought [Member] LegalMatter	Dec. 31, 2013 Claims that Cite Jurisdictional Amounts [Member] LegalMatter	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] LegalMatter	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Minimum [Member] LegalMatter	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Maximum [Member] LegalMatter	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Legal Claim 1 [Member] LegalMatter	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Legal Claim 1 [Member] Compensatory [Member]	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Legal Claim 1 [Member] Punitive [Member]	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Legal Claim 2 [Member] LegalMatter	Dec. 31, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Legal Claim 2 [Member] Punitive [Member]	Dec. 31, 2013 Superfund Sites Proceedings [Member] LegalMatter	Mar. 31, 2010 PCB Contamination Proceedings [Member]	Dec. 31, 2013 PCB Contamination Proceedings [Member]	Dec. 31, 2013 PCB Contamination Proceedings [Member] Building [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of pending claims	362	319								69	291	2			1			1		1
Estimated total cleanup costs, cost sharing percentage																				2.00%
Loss contingency, minimum possible loss																				$ 18.8
Loss contingency, maximum possible loss																				29.6
Estimated total cleanup costs, accrual	0.4
PCB contamination of the building, liability recording during the period																					1.0	0.2
Remediation and monitoring costs incurred since inception related to the PCB soil and building contamination																						1.9	0.8
Percentage of pending claims												1.00%
Damages sought																20	20		20
Number of defendants				1		833							21	29
Number of claims dismissed	115	93
Number of claims settled	23	16
Claims settlements amount	4.8	6.3
Cost Sharing Agreement, expiration date	Jan. 25, 2015
Asbestos Forecast Claim Period	10 years		5 years		10 years
Asbestos-related liabilities, estimated liability							34.9	59.7	77.2
Asbestos-related liabilities, estimated insurance recovery							$ 33.6	$ 57.1	$ 73.2