Other Consolidated Financial Statement (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Litigation settlement agreement	$ 0.0	$ 900.0	$ 0.0	$ 900.0
Net gains recognized on the increase in fair value of equity securities	(105.8)	76.5	(29.3)	267.4
Net gains (losses) realized during the period on equity securities	(0.7)	0.7	0.9	0.5
Other long-term liabilities	776.9		776.9		$ 944.2
Accrued income taxes	383.3		383.3		$ 541.7
Ionis, Sangamo, Denali and Sage
Net gains recognized on the increase in fair value of equity securities	117.7	75.3	78.0	277.1
Net losses recognized on the decrease in fair value of equity securities	$ 10.9		$ 47.4
Net gains recognized on the decrease in fair value of equity securities		$ 3.4		$ 19.0

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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