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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements [Abstract]

Carrying amount and fair values of the Company's assets and liabilities measured on a recurring basis


		March 31, 2013								December 31, 2012
(in millions)		Carrying Amount				Fair Value				Carrying Amount				Fair Value
Assets
Non-derivatives:
Cash and cash equivalents		$	43.2			$	43.2			$	22.4			$	22.4
Short-term investments			5.0				5.0				5.1				5.1
Non-financial assets (Level 3 measurement):
Goodwill—Octane Additives			0.9				0.9				1.3				1.3
Derivatives (Level 1 measurement):
Other non-current assets:
Commodity swaps			0.0				0.0				0.1				0.1
Foreign currency forward exchange contracts			0.0				0.0				0.8				0.8

Liabilities
Non-derivatives:
Long-term debt (including current portion)			37.0				37.0				30.0				30.0
Non-financial liabilities (Level 3 measurement):
Stock equivalent units			12.0				12.0				12.6				12.6
Acquisition-related contingent consideration			4.4				4.4				4.3				4.3
Derivatives (Level 1 measurement):
Other non-current liabilities:
Foreign currency forward exchange contracts		$	1.2			$	1.2			$	0.0			$	0.0