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Significant Accounting Policies - Additional information (Detail) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 17, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Significant Accounting Policies [Line Items]        
Cash deposited with financially sound European us and Israeli banks and financial institutions   $ 2,478    
Percentage of consolidated sales in North America   48.00%    
Shipping and handling costs, which are included in selling and marketing expenses   $ 124 $ 138 $ 159
Advertising expense   $ 225 213 256
Ordinary shares issued upon mandatory conversion of preferred shares 70.6      
Operating leases rent expense net       175
Operating Lease description   Teva determines if an arrangement is a lease at inception. Lease classification is governed by five criteria in ASC 842-10-25-2. If any of these five criteria is met, Teva classifies the lease as a finance lease. Otherwise, Teva classifies the lease as an operating lease. When determining lease classification, Teva’s approach in assessing two of the mentioned criteria is: (i) generally, 75% or more of the remaining economic life of the underlying asset is a major part of the remaining economic life of that underlying asset; and (ii) generally, 90% or more of the fair value of the underlying asset comprises substantially all of the fair value of the underlying asset.    
Royalty income   $ 129 $ 147 $ 165
Building [Member]        
Significant Accounting Policies [Line Items]        
Property plant and equipment useful life   40 years    
Minimum [Member]        
Significant Accounting Policies [Line Items]        
Credit terms to customers   30 days    
Operating Lease Remaining Lease Term   1 year    
Minimum [Member] | Other Machinery and Equipment [Member]        
Significant Accounting Policies [Line Items]        
Property plant and equipment useful life   15 years    
Minimum [Member] | Other Capitalized Property Plant and Equipment [Member]        
Significant Accounting Policies [Line Items]        
Property plant and equipment useful life   5 years    
Maximum [Member]        
Significant Accounting Policies [Line Items]        
Credit terms to customers   90 days    
Operating Lease Remaining Lease Term   78 years    
Maximum [Member] | Other Machinery and Equipment [Member]        
Significant Accounting Policies [Line Items]        
Property plant and equipment useful life   20 years    
Maximum [Member] | Other Capitalized Property Plant and Equipment [Member]        
Significant Accounting Policies [Line Items]        
Property plant and equipment useful life   10 years