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Goodwill and Intangible Assets, Net - Narrative - Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization expense of intangible assets $ 106 $ 112
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Estimated annual amortization expense, remainder of 2021 361  
Estimated annual amortization expense, 2022 355  
Estimated annual amortization expense, 2023 254  
Estimated annual amortization expense, 2024 237  
Estimated annual amortization expense, 2025 234  
Estimated annual amortization expense, thereafter $ 1,600