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Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2016	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Derivative [Line Items]
Revenues other than USD	48.00%			48.00%
Notional amount hedge debt	$ 500			$ 500
Teva other comprehensive loss				493
Forward starting interest rate swaps and treasury lock agreements losses	8	$ 8		24	$ 23
Interest Rate Swap Gain				1
Gain from currency swap				2	3
Cost of sales [Member]
Derivative [Line Items]
Cash received on settlement of position	$ 3			3
Derivative, Gain on Derivative				27	$ 29
Senior Notes Due 2023 Two [Member]
Derivative [Line Items]
Notional amount hedge debt			$ 3,000				$ 500
Previously hedge debt rate							2.80%
Cash received on settlement of position							$ 10
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)			41
Senior Notes Due 2022 [Member]
Derivative [Line Items]
Notional amount hedge debt			$ 844
Previously hedge debt rate			2.95%
Senior Notes Due 2021 [Member]
Derivative [Line Items]
Notional amount hedge debt			$ 450			$ 588
Previously hedge debt rate			3.65%			3.65%
Cash received on settlement of position						$ 95
Revenue 2022 [Member] | Cost of sales [Member]
Derivative [Line Items]
Derivative, Gain on Derivative				$ 6

X

- Definition

Notional amount hedge debt.

+ References

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Gain from currency swap.

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Revenues other than US Dollar.

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 20
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121577181&loc=SL110061172-113977

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
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-SubTopic 10
-Section 50
-Paragraph 4A
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