Balance Sheet Components (Other Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Schedule of Other Assets [Line Items]
Investments in subsidiaries	$ 0.0	$ 0.0
Restricted Cash and Cash Equivalents, Noncurrent	0.0	100.0
Other long-term assets	172.2	176.0
Other Assets, Noncurrent	568.6	751.5
Other assets | Agila Specialties
Schedule of Other Assets [Line Items]
Investments in subsidiaries	75.8	96.2
Clean energy investments | Other assets
Schedule of Other Assets [Line Items]
Investments in subsidiaries	$ 320.6	$ 379.3