Marketable Securities - Schedule of Marketable Securities (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Market value, available for sale securities, current	$ 101.0	$ 75.1
Market value, available for sale securities, noncurrent	1.6	1.2
Non Current Assets
Schedule Of Available For Sale Securities [Line Items]
Market value, available for sale securities, noncurrent	1.6	1.2
Cost or amortized cost	1.6	1.2
Current Assets
Schedule Of Available For Sale Securities [Line Items]
Market value, available for sale securities, current	101.0	75.1
Cost or amortized cost	101.5	75.7
Unrealized loss, net	$ (0.5)	$ (0.6)

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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Amount of investment in marketable security, classified as current.

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Amount of investment in marketable security, classified as noncurrent.

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Amount of unrealized gain (loss) on investment in marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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