Other Consolidated Financial Statement Detail - Gain (Loss) on Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net (gains) losses recognized on equity securities	$ 275.2	$ 264.7	$ 821.1
Less: Net (gains) losses realized on equity securities	5.2	0.0	(10.3)
Net unrealized (gains) losses recognized on equity securities	$ 270.0	$ 264.7	$ 831.4