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Income Taxes (Schedule Of Reconciliation Of U.S. Federal Statutory Tax Rate To Our Effective Income Tax Rate) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2017
Income Tax Examination [Line Items]        
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ (1,057) $ (3,039) $ (474)  
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 512 2,603 25  
Effective Income Tax Rate Reconciliation, CARES Act, Amount 3 [1] (1,175)    
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount [2]   (587) (371)  
Effective Income Tax Rate Reconciliation, Tax Credit, Amount (189) (284) (382)  
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount 41 234 66  
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount (94) (168) (45)  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount [3] 6 82 180  
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Transition Tax on Accumulated Foreign Earnings, Amount [4]   31 229  
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount   (13) (53)  
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount 47 7 20  
Total income tax (benefit)/expense $ (743) $ (2,535) $ (1,623)  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00% 21.00% 35.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent (10.20%) (18.00%) (1.10%)  
Effective Income Tax Rate Reconciliation, CARES Act, Percent (0.10%) [1] 8.10%    
Effective Income Tax Rate Reconciliation, Tax Settlement, Percent [2]   4.10% 16.40%  
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent 3.80% 2.00% 16.90%  
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent (0.90%) (1.70%) (3.00%)  
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent 1.90% 1.20% 2.00%  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent [3] 0.10% 0.60% 8.00%  
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Transition Tax on Accumulated Foreign Earnings, Percent [4]   0.20% 10.10%  
Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent   (0.10%) (2.40%)  
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent (0.90%) (0.10%) (0.90%)  
Effective income tax rate 14.70% 17.50% 71.80%  
[1]
The following is a reconciliation of the U.S. federal statutory tax to actual income tax (benefit)/expense:
Years ended December 31,202120202019
AmountRateAmountRateAmountRate
U.S. federal statutory tax($1,057)21.0 %($3,039)21.0 %($474)21.0 %
Valuation allowance512 (10.2)2,603 (18.0)25 (1.1)
Research and development credits(189)3.8 (284)2.0 (382)16.9 
State income tax provision, net of effects on U.S. federal tax(94)1.9 (168)1.2 (45)2.0 
Tax on non-U.S. activities47 (0.9)7 (0.1)20 (0.9)
Impact of CARES Act (1)
3 (0.1)(1,175)8.1 
Other provision adjustments41 (0.9)234 (1.7)66 (3.0)
Excess tax benefits(2)
(6)0.1 (82)0.6 (180)8.0 
Audit settlements(3)
(587)4.1 (371)16.4 
Foreign derived intangible income(4)
(31)0.2 (229)10.1 
Tax deductible dividends(13)0.1 (53)2.4 
Income tax (benefit)/expense($743)14.7 %($2,535)17.5 %($1,623)71.8 %
(1)    On March 27, 2020, the CARES Act was enacted, which includes a five year net operating loss (NOL) carryback provision which enabled us to benefit from the 2020 U.S. federal tax NOL at the former federal tax rate of 35%. In 2021 and 2020, we recorded tax expense of $3 and tax benefits of $1,175 related to the NOL carryback provision.
(2)    In 2021, 2020 and 2019, we recorded excess tax benefits related to employee share-based payments of $6, $82 and $180, respectively.
(3)    In the fourth quarter of 2020, we recorded a tax benefit of $587 related to the settlement of the 2015-2017 federal tax audit. In the fourth quarter of 2019, we recorded a tax benefit of $371 related to the settlement of state tax audits spanning 15 tax years.
(4)    In 2020 and 2019, we recorded tax benefits related to foreign derived intangible income of $31 and $229, respectively which effectively apply a lower U.S. tax rate to intangible income derived from serving non-U.S. markets.
[2] n 2021, 2020 and 2019, we recorded excess tax benefits related to employee share-based payments of $6, $82 and $180, respectively.
[3] In the fourth quarter of 2020, we recorded a tax benefit of $587 related to the settlement of the 2015-2017 federal tax audit. In the fourth quarter of 2019, we recorded a tax benefit of $371 related to the settlement of state tax audits spanning 15 tax years.
[4] In 2020 and 2019, we recorded tax benefits related to foreign derived intangible income of $31 and $229, respectively which effectively apply a lower U.S. tax rate to intangible income derived from serving non-U.S. markets.