Balance Sheet Components (Other Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Schedule of Other Assets [Line Items]
Equity method investments	$ 0.0	$ 0.0
Other long-term assets	156.0	172.2
Other assets	448.6	568.6
Other assets | Agila Specialties
Schedule of Other Assets [Line Items]
Equity method investments	0.0	75.8
Other assets | Clean energy investments
Schedule of Other Assets [Line Items]
Equity method investments	$ 292.6	$ 320.6