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Goodwill And Acquisition-Related Intangibles, Net (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2022
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Finite-Lived Intangible Assets          
Operating Expenses   $ 1,015 $ 992 $ 2,027 $ 1,906
Goodwill and Intangible Asset Impairment         $ 12
Impairment of Intangible Assets (Excluding Goodwill)   18      
Revenue Cost          
Finite-Lived Intangible Assets          
Impairment of Intangible Assets (Excluding Goodwill)   12      
Operating expenses          
Finite-Lived Intangible Assets          
Impairment of Intangible Assets (Excluding Goodwill)   $ 6      
Minimum          
Finite-Lived Intangible Assets          
Finite-Lived Intangible Asset, Useful Life       1 year  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 5 years        
Maximum          
Finite-Lived Intangible Assets          
Finite-Lived Intangible Asset, Useful Life       7 years  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 5 years 2 months 12 days