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Investments - Equity Investments Without Readily Determinable Fair Values (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Equity Securities without Readily Determinable Fair Value [Roll Forward] |  |  |  |
Carrying value, beginning of period | $ 78 | $ 528 | $ 85 | $ 539
Additions | 0 | 1 | 0 | 1
Upward adjustments for observable price changes | 0 | 41 | 0 | 41
Downward adjustments for observable price changes and impairment | 0 | 0 | (7) | 0
Foreign currency translation and other | (2) | 1 | (2) | (10)
Carrying value, end of period | $ 76 | $ 571 | 76 | $ 571
Strategic Investments |  |  |  |
Equity Securities without Readily Determinable Fair Value [Roll Forward] |  |  |  |
Downward adjustments for observable price changes and impairment |  |  | $ (7) |

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- Definition Equity Securities without Readily Determinable Fair Value, Foreign Currency Translation + References No definition available. + Details
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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
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- Definition Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
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- Definition Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
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