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Goodwill and Other Intangible Assets (Expected Amortization Expense for Acquisition-Related Intangible Assets) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Remainder of 2020 $ 181
2021 694
2022 354
2023 81
2024 57
Thereafter 153
Total $ 1,520