Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended				3 Months Ended	9 Months Ended		12 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2012 LegalMatter	Sep. 30, 2013 claim LegalMatter	Dec. 31, 2012 claim LegalMatter	Dec. 31, 2012 Minimum [Member]	Sep. 30, 2013 Minimum [Member] defendant	Dec. 31, 2012 Maximum [Member]	Sep. 30, 2013 Maximum [Member] defendant	Dec. 31, 2012 Maximum [Member]	Sep. 30, 2013 Claims that Specify Amount of Damages Sought [Member] LegalMatter	Sep. 30, 2013 Claims that Cite Jurisdictional Amounts [Member] LegalMatter	Sep. 30, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] LegalMatter	Sep. 30, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Maximum [Member] defendant	Sep. 30, 2013 Claims that Specify Amount of Damages Sought not Based on Jurisdictional Requirements [Member] Legal Claim 1 [Member] Compensatory [Member]	Sep. 30, 2013 Superfund Sites Proceedings [Member] LegalMatter	Dec. 31, 2012 Superfund Sites Proceedings [Member]	Mar. 31, 2010 PCB Contamination Proceedings [Member]	Sep. 30, 2013 PCB Contamination Proceedings [Member]	Sep. 30, 2013 PCB Contamination Proceedings [Member] Building [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of pending claims (legal matter)	319	355	319						73	281	1			1
Estimated total cleanup costs, cost sharing percentage (percent)														2.00%
Loss contingency, minimum possible loss														$ 18.8	$ 17.0
Loss contingency, maximum possible loss														29.6	24.0
Estimated total cleanup costs, accrual		0.4
Remediation and monitoring costs incurred since inception related to the PCB soil and building contamination																	2.5	0.8
PCB contamination of the building, liability recording during the period																1.0	0.2
Percentage of pending claims (percent)											1.00%
Number of defendants (defendant)					1		833					21
Damages sought													20
Description of named defendants		Cases brought against us typically name 50-300 defendants
Number of claims dismissed		81	94
Number of claims settled (claim)		9	16
Claims settlements amount (claim)		1.5	6.3
Asbestos forcast claim period (years)				5 years		10 years	10 years	10 years
Cost sharing agreement, expiration period (years)		4 years
Cost sharing agreement, expiration date		Jan. 25, 2015
Asbestos-related liabilities, estimated liability	51.4		51.4
Asbestos-related liabilities, estimated insurance recovery	48.3		48.3
Environmental expense and liabilities	2.9
Environmental remediation expense			$ 0.2