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Leases - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Operating leases rent expense net   $ 46 $ 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.    
Lessee Operating Lease Not Yet Commenced $ 0    
Lessee Finance Lease Not Yet Commenced $ 106    
Lessee Operating Lease Option To Extend Term 15 years    
Finance Lease, Right-of-Use Asset $ 76    
Finance Lease, Liability $ 26    
Maximum [Member]      
Operating lease remaining lease term 80 years    
Term of contract, finance leases not yet commenced 12 years    
Term of contract, operating leases not yet commenced 2020 years    
Minimum [Member]      
Operating lease remaining lease term 1 year    
Term of contract, finance leases not yet commenced 9 years    
Term of contract, operating leases not yet commenced 2019 years    
Leasehold Improvements [Member] | Maximum [Member]      
Capitalized land lease estimated useful lives maximum 99 years    
Leasehold Improvements [Member] | Minimum [Member]      
Capitalized land lease estimated useful lives maximum 30 years