Marketable Investment Securities - Narrative (Details) $ in Millions	Dec. 31, 2021 USD ($)
Investments, Debt and Equity Securities [Abstract]
Debt securities with contractual maturities of one year or less	$ 793.4
Debt securities with contractual maturities exceeding one year	$ 87.4

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant