Balance Sheet Components (Other Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Other Assets, Noncurrent [Abstract]
Operating lease right-of-use assets	$ 267.6	$ 245.6
Other long-term assets	721.1	821.1
Other assets	2,465.8	2,208.7
Convertible Preferred Stock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Securities, FV-NI, Cost	1,345.0	976.3
Private Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Securities, FV-NI, Cost	$ 132.1	$ 165.7