Equity Method Investments (Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Investments in subsidiaries	$ 0.0	$ 0.0
Other current liabilities	3,258.5	1,841.9
Other Liabilities, Noncurrent	1,358.6	1,366.0
Clean energy investments
Schedule of Equity Method Investments [Line Items]
Other liabilities	367.0	419.3
Other current liabilities	64.7	62.3
Other Liabilities, Noncurrent	302.3	357.0
Other assets | Clean energy investments
Schedule of Equity Method Investments [Line Items]
Investments in subsidiaries	320.6	379.3
Agila Specialties | Other assets
Schedule of Equity Method Investments [Line Items]
Investments in subsidiaries	$ 75.8	$ 96.2