Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2025

Investments, Debt and Equity Securities [Abstract]

Available-for-sale debt securities

The following tables summarize the Company's investments in available-for-sale debt securities:

(In millions)	Amortized		Unrealized				Fair
As of December 31, 2025	Cost Basis		Gains		Losses		Value
Corporate bonds	$	10,141.0	$	80.9	$	(2.4)	$	10,219.5
U.S. government and government agency obligations	4,352.2		15.2		(0.1)		4,367.3
Commercial paper	540.8		0.3		—		541.1
Certificates of deposit	265.7		0.2		—		265.9
Asset-backed securities	241.4		1.4		—		242.8
Sovereign bonds	76.3		0.5		—		76.8
	$	15,617.4	$	98.5	$	(2.5)	$	15,713.4
As of December 31, 2024
Corporate bonds	$	8,226.9	$	25.1	$	(31.4)	$	8,220.6
U.S. government and government agency obligations	4,820.5		3.4		(6.9)		4,817.0
Commercial paper	548.3		0.4		—		548.7
Certificates of deposit	380.6		0.5		—		381.1
Asset-backed securities	279.0		0.6		(0.3)		279.3
Sovereign bonds	82.7		0.1		(0.4)		82.4
	$	14,338.0	$	30.1	$	(39.0)	$	14,329.1

Marketable securities, based on contractual maturity dates

The fair values of available-for-sale debt securities by contractual maturity consist of the following:

	As of December 31,
(In millions)	2025		2024
Maturities within one year	$	5,487.1	$	6,524.3
Maturities after one year through five years	10,224.8		7,804.8
Maturities after five years	1.5		—
	$	15,713.4	$	14,329.1