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Equity and Other Investments and Fair Value Measurements - Equity and Other Investments in Armata (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Mar. 12, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Equity Investment
Warrant expiration period				3 months
Armata
Equity Investment
Number of warrants owned by parent		10,653,847		10,653,847
Number of shares owned by parent		25,076,769		25,076,769
Term of warrants		5 years		5 years
Armata \| Consolidated Investees
Equity Investment
Equity method investment ownership percentage		69.30%		69.30%
Armata \| Common stock and warrants
Equity Investment
Unrealized gain		$ 13.1
Unrealized loss			$ 60.1	$ 0.4	$ 24.8
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		4.2		$ 4.2		$ 5.9
Armata \| Common stock
Equity Investment
Equity and long-term investments at fair value		47.6		47.6		46.4
Armata \| Armata Convertible Note
Equity Investment
Convertible notes face value		30.1		30.1
Armata \| Convertible Notes
Equity Investment
Equity and long-term investments at fair value		44.0		44.0		42.1
Unrealized gain		6.2		1.9
Unrealized loss			16.6		4.2
Armata \| 2023 Term Loan
Equity Investment
Equity and long-term investments at fair value		31.6		31.6		30.2
Unrealized gain		1.1	0.6	1.4	1.0
Armata \| 2024 Term Loan
Equity Investment
Equity and long-term investments at fair value		41.3		41.3		$ 39.3
Unrealized gain		1.4	$ 0.9	2.0	$ 1.4
Armata \| 2025 Term Loan
Equity Investment
Equity and long-term investments at fair value		10.5		10.5
Unrealized gain		0.4		0.5
Armata \| Armata Term Loan
Equity Investment
Convertible notes face value		$ 70.1		$ 70.1
Minimum [Member] \| Armata \| Warrants
Equity Investment
Exercise price of warrants		$ 3.25		$ 3.25
Maximum [Member] \| Armata \| Warrants
Equity Investment
Exercise price of warrants		$ 5		$ 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