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Strategic Investments (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Schedule of Investments [Line Items] |  |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 272 |
Equity Method Investments | 319 | $ 264
Measurement alternative investments (1) | 183 | 171
Equity Securities, FV-NI | 414 | 1
Notes receivable | 2 | 23
Investments | 918 | $ 458
Unrealized Gain (Loss) on Investments | $ 363 |

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