Fair Value Measurements

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note 4. Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table provides a summary of assets and liabilities measured at fair value on a recurring basis and as reported in the Consolidated Balance Sheets (in millions):

	Fair Value Measurements at December 31, 2020									Fair Value Measurements at December 31, 2019
	Quoted Prices in Active Markets For Identical Assets (Level 1)			Significant Other Observable Remaining Inputs (Level 2)		Significant Other Unobservable Remaining Inputs (Level 3)		Total		Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Other Observable Remaining Inputs (Level 2)		Significant Other Unobservable Remaining Inputs (Level 3)		Total
Assets:
Available-for-sale debt securities:
Asset-backed securities	$	—		$	76.7	$	—	$	76.7	$	—	$	81.4	$	—	$	81.4
Certificates of deposit	—			32.9		—		32.9		—		38.6		—		38.6
Commercial paper	—			89.3		—		89.3		—		168.2		—		168.2
Corporate debt securities	—			637.4		—		637.4		—		605.5		—		605.5
Foreign government debt securities	—			4.6		—		4.6		—		11.4		—		11.4
Time deposits	—			255.6		—		255.6		—		226.3		—		226.3
U.S. government agency securities	—			65.5		—		65.5		—		89.0		—		89.0
U.S. government securities	140.0			93.8		—		233.8		318.9		75.6		—		394.5
Privately-held debt and redeemable preferred stock securities	—			—		55.7		55.7		—		—		56.5		56.5
Total available-for-sale debt securities	140.0			1,255.8		55.7		1,451.5		318.9		1,296.0		56.5		1,671.4
Equity securities:
Money market funds	536.6			—		—		536.6		446.4		—		—		446.4
Mutual funds	29.3			—		—		29.3		26.8		—		—		26.8
Publicly-traded equity securities	6.6			—		—		6.6		3.8		—		—		3.8
Total equity securities	572.5		—	—		—		572.5		477.0		—		—		477.0
Derivative assets:
Foreign exchange contracts	—			38.0		—		38.0		—		2.5		—		2.5
Interest rate contracts	—			51.0		—		51.0		—		—		—		—
Total derivative assets	—			89.0		—		89.0		—		2.5		—		2.5
Total assets measured at fair value on a recurring basis	$	712.5		$	1,344.8	$	55.7	$	2,113.0	$	795.9	$	1,298.5	$	56.5	$	2,150.9
Liabilities:
Derivative liabilities:
Foreign exchange contracts	$	—		$	(0.5)	$	—	$	(0.5)	$	—	$	(6.8)	$	—	$	(6.8)
Interest rate contracts	—			—		—		—		—		(3.1)		—		(3.1)
Total derivative liabilities	—			(0.5)		—		(0.5)		—		(9.9)		—		(9.9)
Total liabilities measured at fair value on a recurring basis	$	—		$	(0.5)	$	—	$	(0.5)	$	—	$	(9.9)	$	—	$	(9.9)
Total assets, reported as:
Cash equivalents	$	519.8		$	333.7	$	—	$	853.5	$	442.3	$	290.9	$	—	$	733.2
Short-term investments	101.0			311.1		—		412.1		188.8		549.2		—		738.0
Long-term investments	45.6			611.0		—		656.6		133.9		455.9		—		589.8
Prepaid expenses and other current assets	9.9			28.0		—		37.9		4.1		2.5		—		6.6
Other long-term assets	36.2			61.0		55.7		152.9		26.8		—		56.5		83.3
Total assets measured at fair value on a recurring basis	$	712.5		$	1,344.8	$	55.7	$	2,113.0	$	795.9	$	1,298.5	$	56.5	$	2,150.9

	Fair Value Measurements at December 31, 2020								Fair Value Measurements at December 31, 2019
	Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Other Observable Remaining Inputs (Level 2)		Significant Other Unobservable Remaining Inputs (Level 3)		Total		Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Other Observable Remaining Inputs (Level 2)		Significant Other Unobservable Remaining Inputs (Level 3)		Total
Total liabilities, reported as:
Other accrued liabilities	$	—	$	(0.3)	$	—	$	(0.3)	$	—	$	(6.8)	$	—	$	(6.8)
Other long-term liabilities	—		(0.2)		—		(0.2)		—		(3.1)		—		(3.1)
Total liabilities measured at fair value on a recurring basis	$	—	$	(0.5)	$	—	$	(0.5)	$	—	$	(9.9)	$	—	$	(9.9)

The Company's Level 2 available-for-sale debt securities are priced using quoted market prices for similar instruments or non-binding market prices that are corroborated by observable market data. The Company uses inputs such as actual trade data, benchmark yields, broker/dealer quotes, or alternative pricing sources with reasonable levels of price transparency which are obtained from quoted market prices, independent pricing vendors, or other sources, to determine the ultimate fair value of these assets. The Company's derivative instruments are classified as Level 2, as they are not actively traded and are valued using pricing models that use observable market inputs. During the years ended December 31, 2020 and 2019, the Company had no transfers into or out of Level 3 of the fair value hierarchy of its assets or liabilities measured at fair value.

The Company's privately-held debt and redeemable preferred stock securities are classified as Level 3 assets due to the lack of observable inputs to determine fair value. The Company estimates the fair value of its privately-held debt and redeemable preferred stock securities on a recurring basis using an analysis of the financial condition and near-term prospects of the investee, including recent financing activities and the investee's capital structure. During the year ended December 31, 2020, there were no material activities related to privately-held debt and redeemable preferred stock.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

The Company's investments in equity securities without readily determinable fair value are classified as Level 3 assets due to the lack of observable inputs to determine fair value. The Company estimates the fair value on a nonrecurring basis (i.e. when an observable transaction occurs) using an analysis of the financial condition and near-term prospects of the investee, including recent financing activities and the investee's capital structure. As of December 31, 2020 and December 31, 2019, there have been no material adjustments for price changes to the equity securities without readily determinable fair value.

Certain of the Company's assets, including intangible assets and goodwill, are measured at fair value on a nonrecurring basis. There were no significant impairment charges recognized during the years ended December 31, 2020, 2019, and 2018.

As of December 31, 2020 and 2019, the Company had no liabilities measured at fair value on a nonrecurring basis.

Assets and Liabilities Not Measured at Fair Value

The carrying amounts of the Company's accounts receivable, accounts payable, and other accrued liabilities approximate fair value due to their short maturities. As of December 31, 2020 and December 31, 2019, the estimated fair value of the Company's total outstanding debt in the Consolidated Balance Sheets was $2,386.6 million and $1,852.1 million, respectively, based on observable market inputs (Level 2). The carrying value of a contract manufacturer deposit of $43.6 million, reported within other long-term assets in the Consolidated Balance Sheets approximates its fair value as of December 31, 2020. See Note 7, Other Financial Information, for further information on contract manufacturer deposit.