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Goodwill and Other Acquired Intangibles - Future Amortization Expense (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2022 $ 1,858
2023 1,826
2024 1,785
2025 1,734
2026 $ 1,494