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Intangible Assets (Schedule of Estimated Amortization of Intangibles for the Next Five Years) (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Estimated Amortization of Intangibles  
2020 $ 2,382
2021 2,308
2022 2,155
2023 1,967
2024 $ 1,773