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Equity and Other Investments and Fair Value Measurements - Equity Investment in Armata (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 12, 2025	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Equity Investment
Warrant expiration period		3 months
Armata
Equity Investment
Number of warrants owned by parent		10,653,847
Number of shares owned by parent		25,076,769
Term of warrants		5 years
Armata \| Consolidated Investees
Equity Investment
Equity method investment ownership percentage		69.30%
Armata \| Common stock and warrants
Equity Investment
Unrealized gain			$ 35.3
Unrealized loss		$ 13.5
Armata \| Warrants purchased in 2020
Equity Investment
Warrants expiration period		The warrants purchased in 2020 expired during the first quarter of 2025.
Armata \| Warrants
Equity Investment
Equity and long-term investments at fair value		$ 2.1		$ 5.9
Armata \| Common stock
Equity Investment
Equity and long-term investments at fair value		36.6		46.4
Armata \| Armata Convertible Note
Equity Investment
Convertible notes face value		30.1
Armata \| Convertible Notes
Equity Investment
Equity and long-term investments at fair value		37.8		42.1
Unrealized gain			12.4
Unrealized loss		4.3
Armata \| 2023 Term Loan
Equity Investment
Equity and long-term investments at fair value		30.5		30.2
Unrealized gain		0.3	0.4
Armata \| 2024 Term Loan
Equity Investment
Equity and long-term investments at fair value		39.9		$ 39.3
Unrealized gain		0.6	$ 0.5
Armata \| 2025 Term Loan
Equity Investment
Equity and long-term investments at fair value		10.1
Unrealized gain		0.1
Armata \| Armata Term Loan
Equity Investment
Convertible notes face value		$ 70.1
Minimum [Member] \| Armata \| Warrants
Equity Investment
Exercise price of warrants		$ 3.25
Maximum [Member] \| Armata \| Warrants
Equity Investment
Exercise price of warrants		$ 5
Innoviva Strategic Opportunities, LLC \| Armata \| March 2025 Credit and Security Agreement
Equity Investment
Term loan facility in aggregate amount	$ 10.0
Debt Instrument, annual interest rate	14.00%
Debt instrument maturity date	Mar. 12, 2026