Balance Sheet Components (Other Current Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Aug. 05, 2016	Dec. 31, 2015
Schedule of other current liabilities [Line Items]
Accrued Sales Allowances Other Current	$ 818.0	$ 809.0
Employee-related Liabilities, Current	404.6	409.8
Estimated Litigation Liability, Current	241.1	720.4
Business Combination, Contingent Consideration, Liability	453.7	564.6		$ 526.4
Restructuring Reserve, Current	91.5	138.6
Compulsory acquisition proceeding liability			$ 431.0
Other current liabilities	2,964.5	3,258.5
Interest Payable, Current	42.3	41.0
Liability derivatives, fair value	31.1	15.3
Other Accrued Liabilities, Current	1,111.4	732.6
Clean energy investments
Schedule of other current liabilities [Line Items]
Other current liabilities	56.7	64.7
Meda AB
Schedule of other current liabilities [Line Items]
Compulsory acquisition proceeding liability	0.0	70.2
Other current liabilities
Schedule of other current liabilities [Line Items]
Business Combination, Contingent Consideration, Liability	$ 167.8	$ 256.9		$ 35.0	[1]

[1] Included in other current liabilities on the Consolidated Balance Sheets.