v3.22.0.1
Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets      
Compensation and employee benefits   $ 937 $ 1,109
Accruals and reserves   667 438
Chargebacks and rebates   837 555
Advance payments   809 324
Net operating losses and other credit carryforwards   10,095 2,765
Other   1,234 1,371
Total deferred tax assets   14,579 6,562
Valuation allowances   (9,391) (1,203)
Total net deferred tax assets   5,188 5,359
Deferred tax liabilities      
Excess of book basis over tax basis of intangible assets   (4,711) (5,274)
Excess of book basis over tax basis in investments   (308) (335)
Other   (904) (982)
Total deferred tax liabilities   (5,923) (6,591)
Net deferred tax liabilities   (735) (1,232)
Tax Credit Carryforward      
Valuation allowances   (9,391) $ (1,203)
Allergan plc      
Tax Credit Carryforward      
Measurement period adjustments to deferred income tax assets $ 8,200    
Measurement period adjustment to deferred tax assets valuation allowance $ 8,200    
U.S. Federal and State      
Tax Credit Carryforward      
Tax credit carryforwards   214  
U.S. Federal, State and Non-U.S.      
Tax Credit Carryforward      
Operating loss carryforwards with expiration through 2041   34,400  
U.S. Federal and Non-U.S.      
Tax Credit Carryforward      
Operating loss carryforwards   $ 3,200