Goodwill - Schedule of Goodwill (Details) $ in Millions	6 Months Ended
	Sep. 30, 2022 USD ($)
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, beginning balance	$ 617
Divestitures	(12)
Foreign currency translation	(43)
Goodwill, gross	10,118
Accumulated impairment losses	(9,556)
Goodwill, ending balance	562
GBS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, beginning balance	617
Divestitures	(12)
Foreign currency translation	(43)
Goodwill, gross	5,052
Accumulated impairment losses	(4,490)
Goodwill, ending balance	562
GIS
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill, beginning balance	0
Divestitures	0
Foreign currency translation	0
Goodwill, gross	5,066
Accumulated impairment losses	(5,066)
Goodwill, ending balance	$ 0