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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 |  |  |

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