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Goodwill (Tables)
6 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Changes in the Carrying Amount of Goodwill by Segment
The following table summarizes the changes in the carrying amount of goodwill, by segment, as of September 30, 2021.

(in millions)GBSGISTotal
Goodwill, gross$5,131 $5,066 $10,197 
Accumulated impairment losses(4,490)(5,066)(9,556)
Balance as of March 31, 2021, net$641 $— $641 
Foreign currency translation (10)— (10)
Goodwill, gross5,121 5,066 10,187 
Accumulated impairment losses(4,490)(5,066)(9,556)
Balance as of September 30, 2021, net$631 $— $631