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Certain Transactions - Assets and Liabilities Held For Sale - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2020
Nov. 30, 2015
Impairment charge $ 261  
Teva [Member]    
Equity Method Investment Ownership Percentage   51.00%
Minority Interest Ownership Percentage   49.00%