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Summary Of Significant Accounting Policies (Narrative) (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 25, 2020
Jun. 10, 2019
Jun. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Significant Accounting Policies [Line Items]                    
Provision for doubtful accounts     $ 303   $ 82 $ 557 $ 166      
Long-lived assets, intangible assets and goodwill located in the foreign operations     1,101     1,101     $ 978  
Allowance for doubtful accounts, loan receivables and chargebacks     868     868     474  
Deferred revenue     29     29     34  
Deferred revenue, revenue recognized           21        
Recognized gains in interest income and other financial gains           12 3      
Aggregate gain included in net revenues arising from financing transactions, net of the costs recognized on sale of credit card receivables,     263   148 490 281      
Income tax expense (benefit)     39   70 85 $ 114      
Allowance for doubtful accounts, loan receivables and chargebacks     $ 842     $ 842     435  
Social security benefit       $ 15       $ 36    
Gain recognized related to export duties accrued       24       24    
2028 Convertible Senior Notes [Member]                    
Significant Accounting Policies [Line Items]                    
Effective tax rate           31.00% 77.00%      
Argentina [Member]                    
Significant Accounting Policies [Line Items]                    
Foreign exchange rate     125.23     125.23        
Argentina [Member] | Maximum [Member]                    
Significant Accounting Policies [Line Items]                    
Non-transferable tax credit bond percent 80.00%                  
Argentina [Member] | Minimum [Member]                    
Significant Accounting Policies [Line Items]                    
Benchmark percent of derived revenue, enacted law   70.00%                
Non-transferable tax credit bond percent 70.00%                  
Secretariat Of Knowledge Economy Resolution Issued [Member]                    
Significant Accounting Policies [Line Items]                    
Income tax expense (benefit)     $ 3 $ 12   $ (4)   $ 12   $ 8
Software development law audit fees     $ 1     $ 2        
Aggregate per share effect of the Argentine tax holiday | $ / shares     $ 0.06     $ 0.08        
Social security benefit     $ 11     $ 26        
Increase Carrying Value Of 2028 Notes [Member] | Accounting Standards Update 2020-06 [Member]                    
Significant Accounting Policies [Line Items]                    
Change in accounting principle, accounting standards update, expected change                 123  
Decrease Deferred Tax Liability Of 2028 Notes [Member] | Accounting Standards Update 2020-06 [Member]                    
Significant Accounting Policies [Line Items]                    
Change in accounting principle, accounting standards update, expected change                 26  
Change In APIC [Member] | Accounting Standards Update 2020-06 [Member]                    
Significant Accounting Policies [Line Items]                    
Change in accounting principle, accounting standards update, expected change                 131  
Change In Retained Earnings [Member] | Accounting Standards Update 2020-06 [Member]                    
Significant Accounting Policies [Line Items]                    
Change in accounting principle, accounting standards update, expected change                 $ 34  
Large [Member] | Argentina [Member]                    
Significant Accounting Policies [Line Items]                    
New criteria benchmark percent, income tax burden 20.00%                  
Medium-Sized [Member] | Argentina [Member]                    
Significant Accounting Policies [Line Items]                    
New criteria benchmark percent, income tax burden 40.00%                  
Micro And Small [Member] | Argentina [Member]                    
Significant Accounting Policies [Line Items]                    
New criteria benchmark percent, income tax burden 60.00%                  
Mexico Segment [Member]                    
Significant Accounting Policies [Line Items]                    
Valuation allowance in certain subsidiaries     $ 2   $ 21 17 $ 33      
Effective tax rate     24.50%   50.90%          
Increase in deferred tax valuation allowance     $ 2   $ 21 $ 17 $ 33