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Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jul. 31, 2016
Derivative [Line Items]                
Teva other comprehensive loss     $ 493.0          
Transactions Termination Loss Settled     242.0          
Forward starting interest rate swaps and treasury lock agreements losses $ 7.0 $ 6.0 14.0 $ 13.0        
Settlement gain position             $ 41.0  
Interest rate swap gain 2.0 1.0 3.0 3.0        
Gain From Currency Swap 9.0 4.0 16.0 4.0        
Senior Notes Due 2023 Two [Member]                
Derivative [Line Items]                
Notional amount hedge debt           $ 500.0    
Previously hedge debt rate           2.80%    
Foreign Exchange Contract [Member] | Financial Expenses Net [Member]                
Derivative [Line Items]                
Gain (loss) recognized in earnings for the period on derivative contracts 24.0 (11.0) 5.0 (58.0)        
Interest Rate and Cross Currency Swap [Member] | Financial Expenses Net [Member]                
Derivative [Line Items]                
Gain (loss) recognized in earnings for the period on derivative contracts $ 0.5 2.0 $ 1.0 3.0        
Senior Notes Due 2022 [Member]                
Derivative [Line Items]                
Notional amount hedge debt   $ 500.0   $ 500.0 $ 500.0      
Asset Derivatives - Options and Forward Contracts [Member] | Cash Flow Hedge [Member]                
Derivative [Line Items]                
Notional amount hedge debt               $ 3,750.0
Treasury Lock [Member] | Cash Flow Hedge [Member]                
Derivative [Line Items]                
Notional amount hedge debt               $ 1,500.0