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Intangible Assets Including Goodwill - Future Amortization (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Future amortization expense, by year  
2021 $ 2,353
2022 2,051
2023 1,546
2024 1,383
2025 1,364
Thereafter 5,099
Capitalized software  
Future amortization expense, by year  
2021 544
2022 305
2023 114
2024 0
Acquired intangibles  
Future amortization expense, by year  
2021 1,809
2022 1,746
2023 1,432
2024 1,382
2025 1,364
Thereafter $ 5,099