v3.20.4
Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets    
Compensation and employee benefits $ 1,109 $ 810
Accruals and reserves 438 371
Chargebacks and rebates 555 477
Advance payments 324 615
Net operating losses and other credit carryforwards 2,765 838
Other 1,371 406
Total deferred tax assets 6,562 3,517
Valuation allowances (1,203) (731)
Total net deferred tax assets 5,359 2,786
Deferred tax liabilities    
Excess of book basis over tax basis of intangible assets (5,274) (2,712)
Excess of book basis over tax basis in investments (335) (249)
Other (982) (440)
Total deferred tax liabilities (6,591) (3,401)
Net deferred tax liabilities (1,232) (615)
Tax Credit Carryforward    
Deferred Tax Assets, Valuation Allowance 1,203 $ 731
U.S. Federal and State    
Tax Credit Carryforward    
Tax credit carryforwards 293  
U.S. Federal, State and Non-U.S.    
Tax Credit Carryforward    
Operating loss carryforwards with expiration through 2040 4,300  
U.S. Federal and Non-U.S.    
Tax Credit Carryforward    
Operating loss carryforwards $ 5,800