Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Measurements

Fair values of financial and non-financial assets and liabilities

	Fair Value Measurements at December 31, 2014
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Short-term investments	$	360.7	$	360.7	$	—	$	—
Forward contracts	11.0		—		11.0		—
Total	$	371.7	$	360.7	$	11.0	$	—

	Fair Value Measurements at December 31, 2013
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Short-term investments	$	305.4		$	305.4	$	—		$	—
Forward contracts	(2.2		)	—		(2.2		)	—
Total	$	303.2		$	305.4	$	(2.2	)	$	—