The total number of Board members of the Investee.

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The number of the Company's Board members currently serving on the Investee's Board.

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The number of warrants issued or sold by the subsidiary or equity method investee per stock transaction.

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The amount the Company agreed to pay for common stock and warrants upon satisfaction of certain closing conditions under the terms of the securities purchase agreement.

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The number of tranches in which the Company agreed to purchase common stock and warrants upon satisfaction of certain closing conditions under the terms of the securities purchase agreement.

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The total number of shares to be purchased under the terms of a securities purchase agreement.

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The total number of warrants to be purchased under the terms of a securities purchase agreement.

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Special Terms on amended and restated investor rights agreement.

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Represents the percentage of maximum voting rights under voting agreement.

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Exercise price per share or per unit of warrants or rights outstanding.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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No definition available.

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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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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Financial Instruments and Fair Value Measurements - Equity Investment in Armata (Details) - Armata $ / shares in Units, $ in Millions		3 Months Ended					9 Months Ended
	Feb. 09, 2022 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) Director	Dec. 31, 2021 USD ($) shares	Sep. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) Director Tranche	Sep. 30, 2021 USD ($)
Equity investment
Number of tranches \| Tranche							2
Percentage of maximum voting rights	49.50%						49.50%
Number of Investee's Board members currently representing the Company \| Director		3					3
Number of the Investee's Board members \| Director		8					8
Unrealized loss from fair value changes in equity investments				$ 11.6			$ 35.3
Unrealized gain		$ 11.7						$ 25.3
Special terms on re-designating board member to board of investee	In addition, as of February 9, 2022, Armata entered into an amended and restated investor rights agreement with the Company and ISO, pursuant to which for as long as the Company and ISO hold at least 12.5% of the outstanding shares of Armata’s common stock on a fully-diluted, the Company and ISO shall have the right to designate two directors to Armata’s board of directors, and for so long as the Company and ISO hold at least 8%, but less than 12.5%, of the outstanding shares of Armata’s common stock on a fully-diluted basis, the Company and ISO shall have the right to designate one director to Armata’s board of directors, subject to certain conditions and qualifications set forth in the amended and restated investor rights agreement.
Consolidated Investees [Member]
Equity investment
Equity method investment ownership percentage		69.40%	59.30%				69.40%
Two Directors
Equity investment
Armata outstanding shares percentage	12.50%
Common stock and warrants
Equity investment
Amount of securities purchase agreement						$ 25.0
Equity and long-term investments at fair value		$ 156.4	$ 146.7				$ 156.4
Warrants purchased in 2020
Equity investment
Exercise price of warrants \| $ / shares						$ 2.87
Term of warrants						5 years
Warrants purchased in 2021
Equity investment
Exercise price of warrants \| $ / shares					$ 3.25
Term of warrants						5 years
Warrants purchased in 2022 Member
Equity investment
Exercise price of warrants \| $ / shares	$ 5.00
Term of warrants	5 years
Warrants
Equity investment
Number of warrants purchased under the securities purchase agreement \| shares						8,710,800
Equity and long-term investments at fair value		50.6	$ 58.6				50.6
Common stock
Equity investment
Number of shares to be purchased under the securities purchase agreement \| shares			1,212,122			8,710,800
Amount of securities purchase agreement			$ 4.0
Equity and long-term investments at fair value		$ 105.8	$ 88.1				$ 105.8
Minimum [Member] \| One Director
Equity investment
Armata outstanding shares percentage	8.00%
Maximum [Member] \| One Director
Equity investment
Armata outstanding shares percentage	12.50%
Innoviva Strategic Opportunities, LLC \| Common stock and warrants
Equity investment
Amount of securities purchase agreement	$ 45.0				$ 20.0
Innoviva Strategic Opportunities, LLC \| Warrants
Equity investment
Number of warrants to be purchased under the securities purchase agreement \| shares	4,500,000				6,153,847
Exercise price of warrants \| $ / shares	$ 5.00
Innoviva Strategic Opportunities, LLC \| Common stock
Equity investment
Number of shares to be purchased under the securities purchase agreement \| shares	9,000,000				6,153,847