Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value of Assets and Liabilities

The following tables present our assets and liabilities that are measured at fair value on a recurring basis at September 30, 2012:

	Fair Value Measurements at September 30, 2012
Assets	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	(in millions)
Fixed income securities	$	6.0		$	6.0	$	—		$	—
Hedging contracts		52.2			—		52.2			—
Total	$	58.2		$	6.0	$	52.2		$	—
	Fair Value Measurements at September 30, 2012
Liabilities	Total			Quoted Prices in Active Markets for Identical Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	(in millions)
Hedging contracts	($	3.3	)	$	—	($	3.3	)	$	—
Total	($	3.3	)	$	—	($	3.3	)	$	—

The following tables present our assets and liabilities that are measured at fair value on a recurring basis at December 31, 2011:

	Fair Value Measurements at December 31, 2011
Assets	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	(in millions)
Money market funds	$	5.6		$	5.6	$	—		$	—
Hedging contracts		47.7			—		47.7			—
Total	$	53.3		$	5.6	$	47.7		$	—
	Fair Value Measurements at December 31, 2011
Liabilities	Total			Quoted Prices in Active Markets for Identical Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	(in millions)
Hedging contracts	($	11.9	)	$	—	($	11.9	)	$	—
Total	($	11.9	)	$	—	($	11.9	)	$	—