Balance Sheet Components (Other Current Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Schedule of other current liabilities [Line Items]
Payments for Legal Settlements	$ 472.7
Other receivables	411.1	$ 464.5
Legal and professional accruals, including litigation accruals	128.7	128.1
Payroll and employee benefit liabilities	311.4	399.7
Contingent consideration	295.1	355.3
Restructuring	37.5	62.3
Other Accrued Liabilities, Current	615.7	635.6
Accrued interest	166.0	62.4
Fair value of financial instruments	9.7	29.4
Operating Lease, Liability, Current	80.0	0.0
Other current liabilities	2,114.0	2,147.6
Clean energy investments
Schedule of other current liabilities [Line Items]
Other current liabilities	46.0	45.1
Prepaid expenses and other current assets
Schedule of other current liabilities [Line Items]
Contingent consideration	114.9	$ 158.3
Voluntary Recall of Valsartan and Certain Combinations Valsartan Medicines [Member] | INDIA
Schedule of other current liabilities [Line Items]
Other current liabilities	$ 3.9