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Other Consolidated Financial Statement (Details Textual) - USD ($) $ in Millions		1 Months Ended	3 Months Ended			9 Months Ended
	Sep. 26, 2023	Oct. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Litigation settlement agreement			$ 0.0	$ 0.0	$ 900.0	$ 0.0	$ 900.0
Net gains recognized on the increase in fair value of equity securities			297.6	(109.3)		268.3	158.1
Net gains (losses) realized during the period on equity securities			4.4	(0.5)		5.3	0.0
Other long-term liabilities			747.9			747.9		$ 944.2
Accrued income taxes			393.8			393.8		$ 541.7
Reata Pharmaceuticals, Inc
Loss on research and development contracts terminated with Eisai	$ 300.0
Total transaction value	$ 6,602.9
Reata Pharmaceuticals, Inc \| Subsequent Event
Total transaction value		$ 980.0
Ionis, Sangamo, Denali and Sage
Net gains recognized on the increase in fair value of equity securities			$ 295.6	$ 112.5		$ 265.0	198.0
Net gains recognized on the decrease in fair value of equity securities							$ 52.2