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Goodwill And Intangible Assets (Composition Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill |  | $ 149 |  | $ 148 | $ 85
Total intangible assets |  | 61 |  | 72 |
Accumulated amortization |  | (30) |  | (27) |
Total intangible assets, net |  | 31 |  | 45 |
Impairment of digital assets |  | 11 | $ 7 |  |
Licenses and Others [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Amortizable intangible assets |  | 13 |  | 13 |
Non-Compete Agreement [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Amortizable intangible assets |  | 4 |  | 4 |
Customer Lists [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Amortizable intangible assets |  | 12 |  | 13 |
Trademarks [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Amortizable intangible assets |  | 8 |  | 7 |
Hub Network [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Amortizable intangible assets |  | 4 |  | 3 |
Other Intangible Assets [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Amortizable intangible assets |  | 3 |  | 3 |
Trademarks [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets with indefinite lives |  | 7 |  | 8 |
Digital Assets [Member] |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets with indefinite lives | [1] | 10 |  | 21 |
Impairment of digital assets |  | $ 20 |  | $ 9 |
[1] | Digital assets are net of $20 million and $9 million of impairment losses as of June 30, 2022 and December 31, 2021.

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