Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Worthless stock deduction	$ 636,100	$ 674,200
Valuation allowance	4,841,209	426,991
Increase in valuation allowance	4,414,200	386,300
Undistributed earnings of foreign subsidiaries	157,300
Total unrecognized tax benefits including interest and penalties	443,582	328,900
Unrecognized tax benefits that would impact effective tax rate	435,400	293,300
Accrued interest and penalties	18,981	12,700
Interest and penalties	5,100	1,600	$ 4,600
Acquisitions
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance		14,700
Worthless Stock Deduction
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance		25,900
Jurisdictions Where Unable to Support Recognition of Deferred Tax Assets
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance	3,950,100	$ 349,400
State Tax Benefits
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance	67,100
Deferred Tax Assets on US Generics
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance	$ 400,800