Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Measurements

Fair values of financial and non-financial assets and liabilities

	Fair Value Measurements
			Quoted Prices in		Significant		Significant
			Active Markets		Observable		Unobservable
			for Identical		Inputs		Inputs
2020	Total		Assets (Level 1)		(Level 2)		(Level 3)
Short-term investments	$	36.1	$	36.1	$	—	$	—
Forward contracts		(2.7)		—		(2.7)		—
Total	$	33.4	$	36.1	$	(2.7)	$	—
2019
Short-term investments	$	17.4	$	17.4	$	—	$	—
Forward contracts		(1.3)		—		(1.3)		—
Contingent consideration		(75.0)		—		—		(75.0)
Total	$	(58.9)	$	17.4	$	(1.3)	$	(75.0)