Schedule of fair value hierarchy of financial instruments held

The following tables present the Company’s fair value hierarchy for certain assets and liabilities held by the Company, with the exception of debt which is presented at its carrying value, as of June 30, 2021 and December 31, 2020 (in millions):


	June 30, 2021
	Total		Level 1		Level 2		Level 3
Assets:
U.S. Treasury securities	$	93.1	$	93.1	$	—	$	—
Deferred compensation plan assets		25.6		25.6		—		—
Total assets	$	118.7	$	118.7	$	—	$	—
Liabilities:
Contingent consideration liabilities	$	26.6	$	—	$	—	$	26.6
Deferred compensation plan liabilities		25.6		25.6		—		—
Debt		1,298.5		—		1,298.5		—
Total liabilities	$	1,350.7	$	25.6	$	1,298.5	$	26.6


	December 31, 2020
	Total		Level 1		Level 2		Level 3
Assets:
U.S. Treasury securities	$	67.9	$	67.9	$	—	$	—
Deferred compensation plan assets		24.5		24.5		—		—
Total assets	$	92.4	$	92.4	$	—	$	—
Liabilities:
Contingent consideration liabilities	$	32.7	$	—	$	—	$	32.7
Deferred compensation plan liabilities		24.5		24.5		—		—
Debt		1,319.1		—		1,319.1		—
Total liabilities	$	1,376.3	$	24.5	$	1,319.1	$	32.7

Summary of changes in the fair value of Level 3 financial liabilities

The following table sets forth a summary of changes in the fair value of the Company’s Level 3 financial liabilities during the three and six months ended June 30, 2021 (in millions):


	Level 3 Financial Liabilities for the Three Months Ended June 30, 2021
	Balance at		Realized (gains)						Foreign
	Beginning of		losses during						Currency		Balance at
	Period		period		Additions		Settlements		Translation		End of Period
Liabilities
Contingent consideration liabilities	$	32.1	$	—	$	—	$	(5.7)	$	0.2	$	26.6
Total liabilities	$	32.1	$	—	$	—	$	(5.7)	$	0.2	$	26.6


	Level 3 Financial Liabilities for the Six Months Ended June 30, 2021
	Balance at		Realized (gains)						Foreign
	Beginning of		losses during						Currency		Balance at
	Period		period		Additions		Settlements		Translation		End of Period
Liabilities
Contingent consideration liabilities	$	32.7	$	—	$	—	$	(6.5)	$	0.4	$	26.6
Total liabilities	$	32.7	$	—	$	—	$	(6.5)	$	0.4	$	26.6