Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 31, 2016
Derivative [Line Items]
Revenues other than USD	50.00%		50.00%
Teva other comprehensive loss			$ 493
Transactions termination loss settled			242
Forward starting interest rate swaps and treasury lock agreements losses	$ 7	$ 7	22	$ 21
Interest Rate Swap Gain	3	$ 2	6	$ 5
Senior Notes Due 2023 Two [Member]
Derivative [Line Items]
Notional amount hedge debt							$ 500
Previously hedge debt rate							2.80%
Settlement gain position	$ 10		$ 10					$ 41
Senior Notes Due 2022 [Member]
Derivative [Line Items]
Notional amount hedge debt								$ 844
Previously hedge debt rate								2.95%
Asset Derivatives - Options and Forward Contracts [Member] \| Cash Flow Hedge [Member]
Derivative [Line Items]
Notional amount hedge debt									$ 3,750
Treasury Lock [Member] \| Cash Flow Hedge [Member]
Derivative [Line Items]
Notional amount hedge debt									$ 1,500
Senior Notes Due 2021 [Member]
Derivative [Line Items]
Notional amount hedge debt								$ 450
Previously hedge debt rate								3.65%
Senior Notes Due 2020 [Member]
Derivative [Line Items]
Notional amount hedge debt					$ 500	$ 500