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Acquisitions, Goodwill, and Acquired Intangible Assets - Expected Future Amortization Expense of Acquired Intangible Assets (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Year Ended December 31,  
2020 $ 486
2021 424
2022 391
2023 334
2024 270
Thereafter 2,116
Acquired intangibles $ 4,021