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Intangible Assets Including Goodwill - Future Amortization (Details)
$ in Millions
Mar. 31, 2021
USD ($)
Future amortization expense, by year  
Remainder of 2021 $ 1,848
2022 2,142
2023 1,627
2024 1,420
2025 1,389
Thereafter 5,109
Capitalized software  
Future amortization expense, by year  
Remainder of 2021 469
2022 368
2023 168
2024 12
Acquired intangibles  
Future amortization expense, by year  
Remainder of 2021 1,379
2022 1,774
2023 1,459
2024 1,408
2025 1,389
Thereafter $ 5,109