Balance Sheet Components (Other Current Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Schedule of other current liabilities [Line Items]
Other receivables	$ 401.4	$ 401.4	$ 464.5
Legal and professional accruals, including litigation accruals	164.6	164.6	128.1
Payroll and employee benefit liabilities	418.7	418.7	399.7
Contingent consideration	258.8	258.8	355.3
Accrued interest	184.6	184.6	62.4
Restructuring	33.6	33.6	62.3
Fair value of financial instruments	25.3	25.3	29.4
Operating lease liability	76.4	76.4	0.0
Other	583.0	583.0	635.6
Other current liabilities	2,375.2	2,375.2	2,147.6
Clean energy investments
Schedule of other current liabilities [Line Items]
Other current liabilities	47.2	47.2	45.1
Prepaid expenses and other current assets
Schedule of other current liabilities [Line Items]
Contingent consideration	121.5	121.5	158.3
Voluntary Recall of Valsartan and Certain Combinations Valsartan Medicines [Member] | INDIA
Schedule of other current liabilities [Line Items]
Inventory Recall Expense	1.0	21.0
Variable Consideration
Schedule of other current liabilities [Line Items]
Other receivables	$ 720.3	$ 720.3	$ 626.7