Balance Sheet Components (Other Long-term Obligations) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Schedule of Other Noncurrent Liabilities [Line Items]
Employee benefit liabilities	$ 390.3	$ 397.7
Contingent consideration	295.1	355.3
Tax related items, including contingencies	76.0	162.1
Operating Lease, Liability, Noncurrent	154.3	0.0
Other	236.5	239.7
Other long-term obligations	1,127.3	1,096.8
Clean energy investments
Schedule of Other Noncurrent Liabilities [Line Items]
Other long-term obligations	90.0	100.3
Other long-term obligations
Schedule of Other Noncurrent Liabilities [Line Items]
Contingent consideration	$ 180.2	$ 197.0