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INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2024
Income Tax Disclosure [Abstract]  
Summary of Income Before Income Taxes
Income before income taxes consists of the following:
Year Ended December 31,
(in millions)202420232022
Domestic$(876)$5,467 $4,439 
Foreign1,566 1,392 1,375 
Income before income taxes$690 $6,859 $5,814 
Summary of Income Tax Expense
Income tax expense consists of the following:
Year Ended December 31,
(in millions)202420232022
Federal:
Current$1,495 $1,781 $2,539 
Deferred(1,562)(1,126)(1,502)
(67)655 1,037 
State:
Current39 80 32 
Deferred(386)170 (154)
(347)250 (122)
Foreign:
Current519 381 232 
Deferred106 (39)101 
625 342 333 
Income tax expense$211 $1,247 $1,248 
Summary of Difference Between Provision for Income Taxes and Federal Statutory Income Tax Rate to Income Before Provision for Income Taxes
The reconciliation between the federal statutory tax rate applied to Income before income taxes and our effective tax rate is summarized as follows(1):
Year Ended December 31,
202420232022
Federal statutory rate21.0 %21.0 %21.0 %
State taxes, net of federal benefit(43.6)%2.3 %(2.0)%
Foreign earnings at different rates10.9 %(0.2)%(0.6)%
Research and other credits(31.6)%(4.3)%(2.7)%
US tax on foreign earnings12.1 %1.0 %2.7 %
Foreign-derived intangible income deduction(19.3)%(2.1)%(3.8)%
Tax examinations(33.7)%(4.7)%(0.2)%
Acquired IPR&D & related charges117.3 %1.3 %1.4 %
Changes in valuation allowance15.6 %0.9 %1.2 %
Non-taxable unrealized loss on investment6.8 %0.2 %0.7 %
Legal entity restructuring(52.6)%— %— %
Other27.6 %2.8 %3.8 %
Effective tax rate30.5 %18.2 %21.5 %
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(1)     Recurring items in this rate reconciliation table for 2024 are significantly impacted by the lower Income before income taxes for that year.
Summary of Deferred Tax Assets and Liabilities
Significant components of our deferred tax4 assets and liabilities are as follows:
December 31,
(in millions)20242023
Deferred tax assets:  
Net operating loss carryforwards$288 $417 
Stock-based compensation84 94 
Reserves and accruals not currently deductible685 644 
Excess of tax basis over book basis of intangible assets910 1,041 
Upfront and milestone payments1,312 1,271 
Research and other credit carryforwards428 283 
Equity investments237 221 
Liability related to future royalties287 296 
Capitalized R&D expenditures2,173 1,623 
Capital losses590 17 
Other, net213 303 
Total deferred tax assets before valuation allowance7,207 6,210 
Valuation allowance(1,217)(663)
Total deferred tax assets5,990 5,547 
Deferred tax liabilities:
Property, plant and equipment(276)(274)
Excess of book basis over tax basis of intangible assets(3,836)(5,481)
Other(224)(184)
Total deferred tax liabilities(4,336)(5,939)
Net deferred tax assets (liabilities)$1,654 $(392)
Summary of Unrecognized Tax Benefits Roll Forward
The following is a rollforward of our total gross unrecognized tax benefits:
Year Ended December 31,
(in millions)202420232022
Beginning balance$1,962 $1,959 $1,713 
Tax positions related to current year:
Additions743 265 129 
Reductions— — — 
Tax positions related to prior years:
Additions190 109 225 
Reductions(298)(315)(31)
Settlements(270)(42)(10)
Lapse of statute of limitations(2)(13)(68)
Ending balance$2,325 $1,962 $1,959