Balance Sheet Components (Other Long-term Obligations) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Schedule of Other Noncurrent Liabilities [Line Items]
Employee benefit liabilities	$ 383.4	$ 397.7
Contingent consideration	258.8	355.3
Tax related items, including contingencies	75.2	162.1
Operating Lease, Liability, Noncurrent	181.3	0.0
Other	83.8	239.7
Other long-term obligations	927.6	1,096.8
Clean energy investments
Schedule of Other Noncurrent Liabilities [Line Items]
Other long-term obligations	66.6	100.3
Other long-term obligations
Schedule of Other Noncurrent Liabilities [Line Items]
Contingent consideration	$ 137.3	$ 197.0