Computation of Basic and Diluted Net Income Per Common Share (Parenthetical) (Detail) shares in Millions	12 Months Ended
Dec. 31, 2021 $ / shares shares
Convertible Notes
Net Income Loss Per Common Share
Initial debt conversion price \| $ / shares	$ 31.52
Shares that would be issued upon conversion \| shares	4.4
Convertible Notes Hedge Warrant
Net Income Loss Per Common Share
Initial debt conversion price \| $ / shares	$ 39.55
Shares that would be issued upon conversion \| shares	14.6

The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant