Balance Sheet Components (Other Long-term Obligations) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Schedule of Other Noncurrent Liabilities [Line Items]
Employee benefit liabilities	$ 999.0	$ 1,020.4
Contingent consideration	209.2	223.6
Tax related items, including contingencies	466.6	469.5
Operating Lease, Liability, Noncurrent	217.2	229.5
Other	508.7	505.8
Other long-term obligations	2,469.6	2,483.1
Restructuring Reserve, Noncurrent	154.6	134.8
Other long-term obligations
Schedule of Other Noncurrent Liabilities [Line Items]
Contingent consideration	$ 123.5	$ 123.1