Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

Marketable Securities and Equity Investments - Summary of Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Cash equivalents:
Amortized Cost	$ 9,171.5	$ 6,795.0	$ 6,275.7	$ 5,988.2
Total marketable debt securities
Fair Value	4,105.5	3,977.1
Corporate equity securities
Amortized Cost	104.4	69.4
Gross Unrealized Gains	29.2	167.1
Gross Unrealized Losses	(10.8)	(5.6)
Fair Value	122.8	230.9
Amortized Cost	584.9	568.9
Gross Unrealized Gains	29.2	167.1
Gross Unrealized Losses	(14.9)	(6.1)
Fair Value	599.2	729.9
Cash equivalents:
Cash equivalents:
Amortized Cost	5,629.1	3,478.1
Fair Value	5,629.1	3,478.1
Total marketable debt securities
Fair Value	3,629.1	3,478.1
Cash equivalents: \| Money market funds
Cash equivalents:
Amortized Cost	3,610.9	3,478.1
Fair Value	3,610.9	3,478.1
Cash equivalents: \| Time deposits
Cash equivalents:
Amortized Cost	2,000.0	0.0
Fair Value	2,000.0	0.0
Cash equivalents: \| Commercial paper
Cash equivalents:
Amortized Cost	18.2	0.0
Fair Value	18.2	0.0
Marketable securities
Total marketable debt securities
Amortized Cost	480.5	499.5
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	(4.1)	(0.5)
Fair Value	476.4	499.0
Marketable securities \| U.S. Treasury securities
Total marketable debt securities
Amortized Cost	131.7	86.6
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	(1.7)	(0.2)
Fair Value	130.0	86.4
Marketable securities \| Government-sponsored enterprise securities
Total marketable debt securities
Amortized Cost	10.6	69.0
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	(0.1)	0.0
Fair Value	10.5	69.0
Marketable securities \| Corporate debt securities
Total marketable debt securities
Amortized Cost	67.8	91.1
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	(1.0)	(0.2)
Fair Value	66.8	90.9
Marketable securities \| Commercial paper
Total marketable debt securities
Amortized Cost	270.4	252.8
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	(1.3)	(0.1)
Fair Value	$ 269.1	$ 252.7